chore(release): bump workspace version to 0.21.0

42 commits since v0.20.0 (v0.20.1 was tagged but never announced; superseded by this release rather than repointed, since real new functionality landed after it was cut). Minor, not patch: the headline is streaming one of the machine's own physical monitors instead of always creating a virtual display — pick it from a new console card or pin it in host.env, on KWin, Mutter, sway and Hyprland, in both the Punktfunk app and Moonlight. Also folds in the full v0.20.1 fix bundle: three Windows install blockers found within hours of 0.20.0, GameStream/Moonlight compat back to opt-in on fresh installs, three gamescope Game Mode takeover faults, a laptop-panel stall misdiagnosis, and the PyroWave high-bitrate latency-creep bundle — plus a KWin 6.7 regression found while building the monitor feature (silent kscreen-doctor fallback on every session) and a winget release-verification CI fix. Wire protocol stays at 2, the embeddable C ABI at 13 and the Windows virtual-display driver protocol at 6. GET /display/monitors is a new additive endpoint; the display policy gains an optional capture_monitor field. No embedder rebuild required. Notes authored ahead of the tag per docs/releases/README.md. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
fix(ci/winget): envs: must live under with:, not as a step sibling
2026-07-28 00:03:44 +02:00 · 2026-07-28 00:01:45 +02:00 · 2026-07-27 23:51:41 +02:00 · 2026-07-27 23:51:41 +02:00 · 2026-07-27 23:51:41 +02:00 · 2026-07-27 23:51:41 +02:00
41 changed files with 4058 additions and 973 deletions
@@ -436,11 +436,13 @@ jobs:
              | grep -q "${GITHUB_REF_NAME#v}" \
              || { echo "served catalogue does not contain ${GITHUB_REF_NAME#v}"; exit 1; }
            echo "winget source serving ${GITHUB_REF_NAME#v}"
          # `env:` below populates the RUNNER's environment; this action runs `script` on the
          # REMOTE host, which inherits nothing from it. `envs:` is the action's OWN input —
          # it must live under `with:` (matching docker.yml/deploy-services.yml's REGISTRY_TOKEN
          # forwarding) — naming the variables to forward into the remote shell. A prior fix put
          # it as a step-level sibling of `with:`/`env:` instead: that key is not part of the
          # step schema, so appleboy/ssh-action never received it as an input and the step kept
          # failing ("GITHUB_REF_NAME: unbound variable") on every tag after 24d2f97e too.
          envs: GITHUB_REF_NAME
        env:
          GITHUB_REF_NAME: ${{ gitea.ref_name }}
        # `env:` populates the RUNNER's environment; this action runs `script` on the REMOTE
        # host, which inherits nothing from it. `envs:` is the action's own allow-list of names
        # to forward into the remote shell — without it `set -u` aborted at the first expansion
        # ("GITHUB_REF_NAME: unbound variable") and the step failed on every tag, after the
        # catalogue had already shipped correctly.
        envs: GITHUB_REF_NAME
@@ -1022,7 +1022,7 @@ dependencies = [
 [[package]]
 name = "display-disturb"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "windows 0.62.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2201,7 +2201,7 @@ dependencies = [
 [[package]]
 name = "latency-probe"
-version = "0.20.1"
+version = "0.21.0"
 [[package]]
 name = "lazy_static"
@@ -2306,7 +2306,7 @@ dependencies = [
 [[package]]
 name = "libvpl-sys"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "bindgen",
 "cmake",
@@ -2341,7 +2341,7 @@ checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"
 [[package]]
 name = "loss-harness"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "punktfunk-core",
 ]
@@ -2830,7 +2830,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 [[package]]
 name = "pf-capture"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ashpd",
@@ -2851,7 +2851,7 @@ dependencies = [
 [[package]]
 name = "pf-client-core"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -2875,7 +2875,7 @@ dependencies = [
 [[package]]
 name = "pf-clipboard"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ashpd",
@@ -2893,7 +2893,7 @@ dependencies = [
 [[package]]
 name = "pf-console-ui"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -2914,7 +2914,7 @@ dependencies = [
 [[package]]
 name = "pf-encode"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -2938,7 +2938,7 @@ dependencies = [
 [[package]]
 name = "pf-ffvk"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "ash",
 "bindgen",
@@ -2947,7 +2947,7 @@ dependencies = [
 [[package]]
 name = "pf-frame"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "libc",
@@ -2959,7 +2959,7 @@ dependencies = [
 [[package]]
 name = "pf-gpu"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "pf-host-config",
@@ -2973,11 +2973,11 @@ dependencies = [
 [[package]]
 name = "pf-host-config"
-version = "0.20.1"
+version = "0.21.0"
 [[package]]
 name = "pf-inject"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ashpd",
@@ -3006,14 +3006,14 @@ dependencies = [
 [[package]]
 name = "pf-paths"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "tracing",
 ]
 [[package]]
 name = "pf-presenter"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -3028,7 +3028,7 @@ dependencies = [
 [[package]]
 name = "pf-vdisplay"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ashpd",
@@ -3060,7 +3060,7 @@ dependencies = [
 [[package]]
 name = "pf-win-display"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "pf-paths",
@@ -3072,7 +3072,7 @@ dependencies = [
 [[package]]
 name = "pf-zerocopy"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ash",
@@ -3280,7 +3280,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-client-android"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "android_logger",
 "jni",
@@ -3296,7 +3296,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-client-linux"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "async-channel",
@@ -3312,7 +3312,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-client-session"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "pf-client-core",
@@ -3327,7 +3327,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-client-windows"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "async-channel",
 "ffmpeg-next",
@@ -3346,7 +3346,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-core"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "aes-gcm",
 "bytes",
@@ -3378,7 +3378,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-host"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "aes",
 "aes-gcm",
@@ -3462,7 +3462,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-probe"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "mdns-sd",
@@ -3476,7 +3476,7 @@ dependencies = [
 [[package]]
 name = "punktfunk-tray"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "anyhow",
 "ksni",
@@ -3499,7 +3499,7 @@ checksum = "d55d956fa96f5ec02be2e13af0e20391a5aa83d6a074e3ad368959d0fab299ea"
 [[package]]
 name = "pyrowave-sys"
-version = "0.20.1"
+version = "0.21.0"
 dependencies = [
 "bindgen",
 "cmake",
@@ -49,7 +49,7 @@ exclude = [
 ndk = { path = "clients/android/native/vendor/ndk" }
 [workspace.package]
-version = "0.20.1"
+version = "0.21.0"
 edition = "2021"
 rust-version = "1.82"
 license = "MIT OR Apache-2.0"
@@ -190,6 +190,38 @@
        }
      }
    },
    "/api/v1/display/monitors": {
      "get": {
        "tags": [
          "display"
        ],
        "summary": "Physical monitors",
        "description": "The heads this host actually has — for pinning capture at one (`PUNKTFUNK_CAPTURE_MONITOR`) and\nfor rendering a picker. Read-only: this never creates, moves or disables anything. Note these\nare *not* the managed virtual displays — those are `/display/state`. See\n`design/per-monitor-portal-capture.md` §5.1.",
        "operationId": "getDisplayMonitors",
        "responses": {
          "200": {
            "description": "The host's physical monitors",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/MonitorsResponse"
                }
              }
            }
          },
          "401": {
            "description": "Missing or invalid bearer token",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ApiError"
                }
              }
            }
          }
        }
      }
    },
    "/api/v1/display/presets": {
      "get": {
        "tags": [
@@ -3646,6 +3678,66 @@
          }
        }
      },
      "ApiMonitorInfo": {
        "type": "object",
        "description": "One physical monitor this host has, as the compositor reports it.",
        "required": [
          "connector",
          "description",
          "mode",
          "x",
          "y",
          "scale",
          "primary",
          "enabled",
          "managed",
          "selected"
        ],
        "properties": {
          "connector": {
            "type": "string",
            "description": "Connector name (`DP-1`, `HDMI-A-2`) — the value `PUNKTFUNK_CAPTURE_MONITOR` takes."
          },
          "description": {
            "type": "string",
            "description": "Human label for a picker (`make model`, else the connector)."
          },
          "enabled": {
            "type": "boolean",
            "description": "Driven right now. A disabled head is still listed, so it can be explained rather than missing."
          },
          "managed": {
            "type": "boolean",
            "description": "Best-effort: this is one of OUR virtual displays, not a real head (reliable on KWin only)."
          },
          "mode": {
            "type": "string",
            "description": "`WIDTHxHEIGHT@HZ` of the current mode (size only when the refresh is unknown)."
          },
          "primary": {
            "type": "boolean",
            "description": "The compositor's primary/focused head."
          },
          "scale": {
            "type": "number",
            "format": "double",
            "description": "Logical scale factor."
          },
          "selected": {
            "type": "boolean",
            "description": "True when `PUNKTFUNK_CAPTURE_MONITOR` currently names this monitor."
          },
          "x": {
            "type": "integer",
            "format": "int32",
            "description": "Desktop-space top-left — what makes a head identifiable when two share a size."
          },
          "y": {
            "type": "integer",
            "format": "int32"
          }
        }
      },
      "ApiSelectedGpu": {
        "type": "object",
        "description": "The GPU the **next** session's pipeline will be created on, and why. (A preference change\napplies to the next session; a running session keeps the GPU it opened on.)",
@@ -4251,6 +4343,13 @@
        "type": "object",
        "description": "The user-facing display-management policy — what `display-settings.json` holds and what the mgmt\nAPI GETs/PUTs. When [`preset`](Self::preset) is not [`Preset::Custom`] the explicit fields are\nignored (the console writes one or the other); [`effective`](Self::effective) resolves both to a\nsingle [`EffectivePolicy`].",
        "properties": {
          "capture_monitor": {
            "type": [
              "string",
              "null"
            ],
            "description": "**Mirror a physical monitor instead of creating a virtual display**: the connector name\n(`DP-1`, `HDMI-A-2`) sessions should stream, or `None` for the normal virtual-display path.\n\nOrthogonal to `preset`/lifecycle (like `game_session`): a preset change never clears it, and\n`#[serde(default)]` leaves existing `display-settings.json` files untouched. It is a\n**host-wide** setting, not per-client — the host-pinned decision of record in\n`design/per-monitor-portal-capture.md` §5.3. `PUNKTFUNK_CAPTURE_MONITOR` overrides it (see\n[`capture_monitor`]), so an appliance can pin in `host.env` without the console fighting it."
          },
          "ddc_power_off": {
            "type": "boolean",
            "description": "EXPERIMENTAL (Windows): command physical monitors' panels off over DDC/CI (VCP 0xD6 →\nDPMS off) right before an `Exclusive` isolate deactivates them, and back on at restore.\nTargets the \"connected-but-dark head\" periodic-stutter class (monitor standby\nauto-input-scan / DP link churn while the virtual display is the sole active display) at\nthe monitor-firmware level. Best-effort — monitors without DDC/CI (or with it disabled in\nthe OSD) are skipped. Orthogonal to `preset` (like `game_session`): preserved across\npreset changes; `#[serde(default)]` = off so existing `display-settings.json` files are\nuntouched."
@@ -5720,6 +5819,43 @@
          "reject"
        ]
      },
      "MonitorsResponse": {
        "type": "object",
        "description": "The host's physical monitors + which one capture is pinned to.",
        "required": [
          "monitors"
        ],
        "properties": {
          "compositor": {
            "type": [
              "string",
              "null"
            ],
            "description": "Compositor backend the enumeration came from (`kwin`, `mutter`, …), when one was resolved."
          },
          "error": {
            "type": [
              "string",
              "null"
            ],
            "description": "Why the list is empty, when enumeration failed (compositor unreachable, unsupported\nplatform). `None` with an empty list means \"asked, and there are none\"."
          },
          "monitors": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/ApiMonitorInfo"
            },
            "description": "The heads, ordered left-to-right by desktop position."
          },
          "pinned": {
            "type": [
              "string",
              "null"
            ],
            "description": "The configured `PUNKTFUNK_CAPTURE_MONITOR`, if any — reported even when it matches nothing,\nso the console can show \"pinned to DP-2, which this host doesn't have\"."
          }
        }
      },
      "NativeClient": {
        "type": "object",
        "description": "A paired native (punktfunk/1) client.",
@@ -10,13 +10,18 @@
 use anyhow::{anyhow, Context, Result};
 use std::os::fd::OwnedFd;
-/// Whether any monitor of the live GNOME session is currently in BT.2100 (HDR) colour mode — the
+/// Whether the monitor this host would mirror is currently in BT.2100 (HDR) colour mode — the
 /// precondition for Mutter's monitor screencast advertising the 10-bit PQ formats (GNOME 50+;
 /// Mutter only appends the HDR formats while the mirrored monitor's colour state is BT.2020+PQ).
 /// Queried over the session bus: `DisplayConfig.GetCurrentState`, monitor property
 /// `"color-mode" == 1` (`META_COLOR_MODE_BT2100`). `false` on any error — not GNOME, a pre-48
 /// Mutter without colour modes, no monitors — so callers fall back to the honest SDR offer.
 /// Blocking (one D-Bus round-trip on a fresh connection); call from control-plane threads only.
 ///
 /// **Scoped to `PUNKTFUNK_CAPTURE_MONITOR` when it is set** (`design/per-monitor-portal-capture.md`
 /// §7.4). Without a pin this asks "is ANY monitor in HDR mode", which was a fair heuristic while the
 /// capture path took whatever monitor it was handed — but once the operator names the head, an
 /// HDR-capable *neighbour* must not talk this host into offering PQ formats for an SDR panel.
 pub fn gnome_hdr_monitor_active() -> bool {
    use ashpd::zbus;
    // GetCurrentState reply: (serial, monitors, logical_monitors, properties); each monitor is
@@ -74,12 +79,21 @@ pub fn gnome_hdr_monitor_active() -> bool {
                .body()
                .deserialize()
                .context("parse GetCurrentState")?;
-            Ok(monitors.iter().any(|(_spec, _modes, props)| {
+            // `spec.0` is the connector; "color-mode" 1 is META_COLOR_MODE_BT2100.
-                props
+            let heads: Vec<(&str, bool)> = monitors
                .iter()
                .map(|(spec, _modes, props)| {
                    let hdr = props
                        .get("color-mode")
                        .and_then(|v| u32::try_from(v).ok())
-                    .is_some_and(|mode| mode == 1) // META_COLOR_MODE_BT2100
+                        .is_some_and(|mode| mode == 1);
-            }))
+                    (spec.0.as_str(), hdr)
                })
                .collect();
            Ok(hdr_offer_for(
                &heads,
                pf_host_config::config().capture_monitor.as_deref(),
            ))
        })
    };
    match probe() {
@@ -91,6 +105,24 @@ pub fn gnome_hdr_monitor_active() -> bool {
    }
 }
 /// Should this host offer the HDR (10-bit PQ) formats, given each head as `(connector, is_bt2100)`
 /// and the `PUNKTFUNK_CAPTURE_MONITOR` pin?
 ///
 /// Pinned: only that head's colour mode counts — an HDR-capable neighbour must not talk the host
 /// into offering PQ for the SDR panel it is actually streaming. A pin naming no live head reports
 /// SDR rather than falling back to "any": the session is about to fail on that same missing
 /// monitor, and an over-claimed HDR offer would be a second, quieter wrong answer.
 /// Unpinned: the pre-existing "any monitor is in HDR mode" heuristic, unchanged.
 fn hdr_offer_for(heads: &[(&str, bool)], pinned: Option<&str>) -> bool {
    match pinned {
        Some(want) => heads
            .iter()
            .find(|(connector, _)| connector.eq_ignore_ascii_case(want))
            .is_some_and(|(_, hdr)| *hdr),
        None => heads.iter().any(|(_, hdr)| *hdr),
    }
 }
 /// Pick the ScreenCast cursor mode from what the backend advertises (`AvailableCursorModes`).
 /// With `want_metadata` the ladder prefers **cursor-as-metadata**: the compositor keeps its cheap
 /// hardware cursor plane and ships the pointer as PipeWire `SPA_META_Cursor` metadata (position +
@@ -355,3 +387,33 @@ pub(super) fn portal_thread_remote_desktop(
    // See `portal_thread`: drop the runtime before the caller's completion signal.
    drop(rt);
 }
 #[cfg(test)]
 mod hdr_offer_tests {
    use super::hdr_offer_for;
    #[test]
    fn unpinned_keeps_the_any_monitor_heuristic() {
        assert!(hdr_offer_for(&[("DP-1", false), ("HDMI-A-1", true)], None));
        assert!(!hdr_offer_for(&[("DP-1", false)], None));
    }
    /// The regression this exists to prevent: an HDR TV on HDMI while the pinned head is an SDR
    /// desk monitor. Before scoping, the host offered PQ formats for a panel that can't show them.
    #[test]
    fn a_pin_ignores_an_hdr_neighbour() {
        let heads = [("DP-1", false), ("HDMI-A-1", true)];
        assert!(!hdr_offer_for(&heads, Some("DP-1")));
        assert!(hdr_offer_for(&heads, Some("HDMI-A-1")));
    }
    #[test]
    fn a_pin_matches_case_insensitively_like_the_resolver() {
        assert!(hdr_offer_for(&[("HDMI-A-1", true)], Some("hdmi-a-1")));
    }
    #[test]
    fn a_pin_naming_no_live_head_reports_sdr() {
        assert!(!hdr_offer_for(&[("DP-1", true)], Some("DP-9")));
    }
 }
@@ -96,6 +96,14 @@ pub struct HostConfig {
    pub perf: bool,
    /// `PUNKTFUNK_VIDEO_SOURCE` — GameStream video source select (`virtual` / `portal` / unset → synthetic).
    pub video_source: Option<String>,
    /// `PUNKTFUNK_CAPTURE_MONITOR` — pin capture at a NAMED physical monitor (`DP-1`, `HDMI-A-2`),
    /// instead of creating a virtual display or taking whichever head the portal hands back. The
    /// point of the knob is an unattended host: a background `systemd --user` service has nobody to
    /// answer a chooser dialog, so the monitor has to be config, not a prompt. A name that matches
    /// no head is a hard error at session open (never a silent fall-back to a different screen —
    /// showing the wrong monitor is worse than showing none). Linux-only today; see
    /// `design/per-monitor-portal-capture.md`.
    pub capture_monitor: Option<String>,
    /// `PUNKTFUNK_COMPOSITOR` — explicit compositor override (operator/CI/test). NOT the runtime-detected
    /// session — this one is a constant operator knob; `apply_session_env` never writes it.
    pub compositor: Option<String>,
@@ -170,6 +178,11 @@ impl HostConfig {
            chacha20: env_on("PUNKTFUNK_CHACHA20").unwrap_or(true),
            perf: flag("PUNKTFUNK_PERF"),
            video_source: val("PUNKTFUNK_VIDEO_SOURCE"),
            // Trimmed + emptied-to-None: `PUNKTFUNK_CAPTURE_MONITOR=` in a host.env means "not
            // set", not "match the monitor named empty string".
            capture_monitor: val("PUNKTFUNK_CAPTURE_MONITOR")
                .map(|s| s.trim().to_string())
                .filter(|s| !s.is_empty()),
            compositor: val("PUNKTFUNK_COMPOSITOR"),
            gamepad: val("PUNKTFUNK_GAMEPAD"),
            vdisplay: val("PUNKTFUNK_VDISPLAY"),
@@ -20,6 +20,7 @@
 //! key events) is enough.
 use super::{gs_button_to_evdev, vk_to_evdev, InputInjector};
 use crate::AbsoluteAnchor;
 use anyhow::{anyhow, Result};
 use ashpd::desktop::{
    remote_desktop::{
@@ -374,25 +375,98 @@ async fn connect_socket_file(file: &std::path::Path) -> Result<(UnixStream, Opti
 }
 /// One EI device and its emulation state.
-/// Pick the region to map absolute coordinates into: the one whose logical size matches the
+/// Pick the region to map absolute coordinates into. The device advertises one region per logical
-/// streamed mode (the session's virtual output). The device advertises one region per logical
+/// monitor and blindly taking `first()` next to a physical monitor put the pointer — and every
 /// monitor, and blindly taking `first()` next to a physical monitor put the pointer — and every
 /// click — on whichever output the compositor happened to announce first (on-glass: GNOME with a
 /// dummy HDMI beside the virtual primary; the seat cursor never entered the streamed monitor, so
-/// neither embedded nor metadata cursor capture could see it). Size is the only key available
+/// neither embedded nor metadata cursor capture could see it).
-/// today: regions carry no output name, and matching the screencast stream's `mapping_id` needs
+///
-/// the stream id plumbed across crates (follow-up). Two same-sized monitors stay ambiguous.
+/// The ladder, most identifying first:
-fn region_for_mode(
+///
-    regions: &[reis::event::Region],
+/// 1. **`mapping_id`** from the session's [`AbsoluteAnchor`] — the protocol's own key for
 ///    correlating a region with a video stream.
 /// 2. **origin** from the anchor — two outputs can share a size, never a top-left. This is what
 ///    makes a *mirrored physical monitor* land correctly (`design/per-monitor-portal-capture.md`
 ///    §7.2): its region is not the client's size, so the size rung can't find it.
 /// 3. **size** — the streamed mode. Correct for a client-sized virtual output, ambiguous the
 ///    moment two heads share a mode, which is exactly why the rungs above exist.
 /// 4. `first()`.
 ///
 /// An anchor that matches nothing falls through rather than failing: the region set is the truth
 /// and the anchor is our belief about it. The caller logs that miss ([`anchor_missed`]).
 fn region_for_mode<'a>(
    regions: &'a [reis::event::Region],
    w: f32,
    h: f32,
-) -> Option<&reis::event::Region> {
+    anchor: Option<&AbsoluteAnchor>,
 ) -> Option<&'a reis::event::Region> {
    if let Some(a) = anchor {
        if let Some(id) = a.mapping_id.as_deref() {
            if let Some(r) = regions.iter().find(|r| r.mapping_id.as_deref() == Some(id)) {
                return Some(r);
            }
        }
        if let Some((x, y)) = a.origin {
            // EI region offsets are unsigned; a compositor places every output at a non-negative
            // origin in its own global space, so a negative anchor simply matches nothing.
            if x >= 0 && y >= 0 {
                if let Some(r) = regions.iter().find(|r| r.x == x as u32 && r.y == y as u32) {
                    return Some(r);
                }
            }
        }
    }
    regions
        .iter()
        .find(|r| r.width as f32 == w && r.height as f32 == h)
        .or_else(|| regions.first())
 }
 /// Report which region absolute coordinates actually landed in, once per distinct answer.
 ///
 /// The ladder above is only *observable* through where the pointer ends up, which on a two-head box
 /// is precisely the thing that is hard to see and easy to get wrong — the anchor exists because it
 /// already resolved wrong on-glass once, silently. `warn_anchor_miss` covers the anchor naming
 /// nothing; this covers the other half, an anchor that matched *something*, by saying which. Once
 /// per distinct region so a live session logs one line, not one per motion event.
 fn note_abs_region(region: &reis::event::Region, anchor: Option<&AbsoluteAnchor>) {
    static LAST: std::sync::Mutex<Option<(u32, u32, u32, u32)>> = std::sync::Mutex::new(None);
    let key = (region.x, region.y, region.width, region.height);
    let mut last = LAST.lock().unwrap_or_else(|e| e.into_inner());
    if *last == Some(key) {
        return;
    }
    *last = Some(key);
    tracing::info!(
        region = %format!("{}x{}+{}+{}", region.width, region.height, region.x, region.y),
        mapping_id = ?region.mapping_id,
        anchor_origin = ?anchor.and_then(|a| a.origin),
        anchor_mapping_id = ?anchor.and_then(|a| a.mapping_id.clone()),
        "libei: absolute input maps into this output"
    );
 }
 /// Did an anchor name an output this region set doesn't have? Drives the one-shot warning — a
 /// silently mis-mapped pointer is the failure this whole ladder exists to prevent, so when the
 /// anchor can't be honored that has to be visible in the log rather than inferred from "clicks land
 /// on the wrong screen".
 fn anchor_missed(regions: &[reis::event::Region], anchor: Option<&AbsoluteAnchor>) -> bool {
    let Some(a) = anchor else {
        return false;
    };
    if let Some(id) = a.mapping_id.as_deref() {
        if regions.iter().any(|r| r.mapping_id.as_deref() == Some(id)) {
            return false;
        }
    }
    if let Some((x, y)) = a.origin {
        if x >= 0 && y >= 0 && regions.iter().any(|r| r.x == x as u32 && r.y == y as u32) {
            return false;
        }
    }
    true
 }
 struct DeviceSlot {
    device: reis::event::Device,
    /// The device is resumed (allowed to emit). Devices arrive paused and may pause again.
@@ -430,6 +504,30 @@ struct EiState {
    output_hint: Option<(u32, u32)>,
 }
 /// The anchor whose miss we last warned about, so a persistently unmatchable anchor logs once per
 /// *change* instead of once per pointer sample (absolute motion arrives at client frame rate).
 static LAST_WARNED_ANCHOR: std::sync::Mutex<Option<String>> = std::sync::Mutex::new(None);
 /// Warn — once per distinct anchor — that the session's anchor names an output this EIS doesn't
 /// advertise, so absolute coordinates fell back to size matching. See [`region_for_mode`].
 fn warn_anchor_miss(anchor: &AbsoluteAnchor, regions: &[reis::event::Region]) {
    let key = format!("{anchor:?}");
    let mut last = LAST_WARNED_ANCHOR.lock().unwrap_or_else(|e| e.into_inner());
    if last.as_deref() == Some(key.as_str()) {
        return;
    }
    *last = Some(key);
    tracing::warn!(
        ?anchor,
        regions = ?regions
            .iter()
            .map(|r| (r.x, r.y, r.width, r.height, r.mapping_id.clone()))
            .collect::<Vec<_>>(),
        "libei: the session's absolute-coordinate anchor matches no EIS region — falling back to \
         size matching, so the pointer may land on the wrong monitor"
    );
 }
 /// Is this EIS region a plausible OUTPUT geometry — something to map normalized coordinates
 /// into? gamescope advertises a degenerate `(0,0,INT32_MAX,INT32_MAX)` "everything" region on
 /// its virtual input device, meaning "absolute coordinates are raw"; normalizing into it
@@ -763,13 +861,23 @@ impl EiState {
                        // raw client pixels as the last resort.
                        let nx = (ev.x as f32 / w).clamp(0.0, 1.0);
                        let ny = (ev.y as f32 / h).clamp(0.0, 1.0);
-                        let (x, y) = match region_for_mode(slot.regions(), w, h)
+                        let anchor = crate::absolute_anchor();
                        if let Some(a) = anchor
                            .as_ref()
                            .filter(|a| anchor_missed(slot.regions(), Some(a)))
                        {
                            warn_anchor_miss(a, slot.regions());
                        }
                        let (x, y) = match region_for_mode(slot.regions(), w, h, anchor.as_ref())
                            .filter(|r| sane_region(r))
                        {
-                            Some(region) => (
+                            Some(region) => {
                                note_abs_region(region, anchor.as_ref());
                                (
                                    region.x as f32 + nx * region.width as f32,
                                    region.y as f32 + ny * region.height as f32,
-                            ),
+                                )
                            }
                            // Degenerate/absent region: scale into the relay-file output hint
                            // (correct even when the client streams at a different resolution
                            // than the session runs); raw client pixels as the last resort.
@@ -847,14 +955,20 @@ impl EiState {
                    Some(t) if w > 0.0 && h > 0.0 => {
                        let nx = (ev.x as f32 / w).clamp(0.0, 1.0);
                        let ny = (ev.y as f32 / h).clamp(0.0, 1.0);
-                        // Same region-selection + degenerate fallback ladder as MouseMoveAbs.
+                        // Same region-selection + degenerate fallback ladder as MouseMoveAbs
-                        let (x, y) = match region_for_mode(slot.regions(), w, h)
+                        // (including the session anchor — touch must land on the same monitor the
                        // pointer does, or a mirrored session's taps go to a different screen).
                        let anchor = crate::absolute_anchor();
                        let (x, y) = match region_for_mode(slot.regions(), w, h, anchor.as_ref())
                            .filter(|r| sane_region(r))
                        {
-                            Some(region) => (
+                            Some(region) => {
                                note_abs_region(region, anchor.as_ref());
                                (
                                    region.x as f32 + nx * region.width as f32,
                                    region.y as f32 + ny * region.height as f32,
-                            ),
+                                )
                            }
                            None => match self.output_hint {
                                Some((ow, oh)) => (nx * ow as f32, ny * oh as f32),
                                None => (ev.x as f32, ev.y as f32),
@@ -913,3 +1027,122 @@ impl EiState {
        }
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    fn region(x: u32, y: u32, w: u32, h: u32, mapping_id: Option<&str>) -> reis::event::Region {
        reis::event::Region {
            x,
            y,
            width: w,
            height: h,
            scale: 1.0,
            mapping_id: mapping_id.map(str::to_string),
        }
    }
    /// The case the anchor exists for: two heads at the SAME size, so the size rung is a coin
    /// flip. The origin picks the right one.
    #[test]
    fn the_origin_disambiguates_two_same_size_monitors() {
        let regions = [
            region(0, 0, 1920, 1080, None),
            region(1920, 0, 1920, 1080, None),
        ];
        let anchor = AbsoluteAnchor {
            origin: Some((1920, 0)),
            mapping_id: None,
        };
        let picked = region_for_mode(&regions, 1920.0, 1080.0, Some(&anchor)).unwrap();
        assert_eq!((picked.x, picked.y), (1920, 0));
        // Without the anchor the same call takes the first same-sized region — the old behavior,
        // preserved deliberately for the client-sized virtual-output path.
        let picked = region_for_mode(&regions, 1920.0, 1080.0, None).unwrap();
        assert_eq!((picked.x, picked.y), (0, 0));
    }
    /// `mapping_id` outranks the origin: it is the protocol's own stream↔region correlation, so a
    /// stale/rounded origin can't override it.
    #[test]
    fn mapping_id_outranks_the_origin() {
        let regions = [
            region(0, 0, 1920, 1080, Some("head-a")),
            region(1920, 0, 1920, 1080, Some("head-b")),
        ];
        let anchor = AbsoluteAnchor {
            origin: Some((0, 0)),
            mapping_id: Some("head-b".into()),
        };
        let picked = region_for_mode(&regions, 1920.0, 1080.0, Some(&anchor)).unwrap();
        assert_eq!(picked.mapping_id.as_deref(), Some("head-b"));
    }
    /// A mirrored monitor's region is NOT the client's streamed size, so the size rung would miss
    /// it entirely — the origin is what makes this land.
    #[test]
    fn the_anchor_finds_a_monitor_the_streamed_size_does_not_match() {
        let regions = [
            region(0, 0, 1920, 1080, None),
            region(1920, 0, 3840, 2160, None),
        ];
        // Client streams 1280x720 of a 4K head parked to the right.
        let anchor = AbsoluteAnchor {
            origin: Some((1920, 0)),
            mapping_id: None,
        };
        let picked = region_for_mode(&regions, 1280.0, 720.0, Some(&anchor)).unwrap();
        assert_eq!((picked.width, picked.height), (3840, 2160));
    }
    /// An anchor that names nothing present must not strand input: fall back down the ladder
    /// (size, then first) — and say so, which `anchor_missed` drives.
    #[test]
    fn an_unmatched_anchor_falls_back_and_is_reported() {
        let regions = [region(0, 0, 1920, 1080, None)];
        let anchor = AbsoluteAnchor {
            origin: Some((5000, 5000)),
            mapping_id: None,
        };
        assert!(anchor_missed(&regions, Some(&anchor)));
        let picked = region_for_mode(&regions, 1920.0, 1080.0, Some(&anchor)).unwrap();
        assert_eq!((picked.x, picked.y), (0, 0), "fell back to the size match");
        // A matched anchor is never reported as missed.
        let ok = AbsoluteAnchor {
            origin: Some((0, 0)),
            mapping_id: None,
        };
        assert!(!anchor_missed(&regions, Some(&ok)));
        assert!(!anchor_missed(&regions, None), "no anchor is not a miss");
    }
    /// EI region offsets are unsigned; a negative anchor origin can only ever match nothing, and
    /// must not be cast into a huge u32 that accidentally matches something.
    #[test]
    fn a_negative_origin_matches_nothing_rather_than_wrapping() {
        let regions = [region(0, 0, 1920, 1080, None)];
        let anchor = AbsoluteAnchor {
            origin: Some((-1920, 0)),
            mapping_id: None,
        };
        assert!(anchor_missed(&regions, Some(&anchor)));
        let picked = region_for_mode(&regions, 1920.0, 1080.0, Some(&anchor)).unwrap();
        assert_eq!((picked.x, picked.y), (0, 0));
    }
    /// An empty anchor is the same as no anchor — so a caller can build one unconditionally and
    /// let the setter drop it.
    #[test]
    fn an_empty_anchor_is_dropped_by_the_setter() {
        crate::set_absolute_anchor(Some(AbsoluteAnchor::default()));
        assert_eq!(crate::absolute_anchor(), None);
        crate::set_absolute_anchor(Some(AbsoluteAnchor {
            origin: Some((1920, 0)),
            mapping_id: None,
        }));
        assert_eq!(crate::absolute_anchor().unwrap().origin, Some((1920, 0)));
        crate::set_absolute_anchor(None);
        assert_eq!(crate::absolute_anchor(), None);
    }
 }
@@ -107,6 +107,64 @@ pub fn open(_backend: Backend) -> Result<Box<dyn InputInjector>> {
    anyhow::bail!("no input-injection backend on this platform")
 }
 /// Which output the session's **absolute** coordinates belong to, by identity rather than by size.
 ///
 /// libei hands the injector one region per logical monitor and the region set carries no output
 /// name, so the backend has to decide which one a normalized client position maps into. Matching on
 /// *size* — all it could do before — is a coin flip the moment two heads share a mode, and it
 /// resolved wrong on-glass once already (GNOME, a dummy HDMI beside the virtual primary: the seat
 /// cursor never entered the streamed monitor). These are the two keys that actually identify a
 /// region: the protocol's own `mapping_id`, and the origin (two outputs can share a size; they can
 /// never share a top-left).
 ///
 /// Best-effort by design: an anchor that matches no region warns and falls back to the size ladder,
 /// because the region set is the truth and the anchor is our belief about it.
 #[derive(Clone, Debug, Default, PartialEq)]
 pub struct AbsoluteAnchor {
    /// The target output's top-left in the compositor's global logical space.
    pub origin: Option<(i32, i32)>,
    /// The EI `mapping_id` of the target output, when the capture side knows it — the protocol's
    /// blessed way to correlate a region with a video stream, so it wins over the origin.
    pub mapping_id: Option<String>,
 }
 impl AbsoluteAnchor {
    /// Nothing to match on — treated as "no anchor" so callers can build one unconditionally.
    pub fn is_empty(&self) -> bool {
        self.origin.is_none() && self.mapping_id.is_none()
    }
 }
 /// The current absolute-coordinate anchor. A `RwLock` rather than an env var: the injector is
 /// host-lifetime and lives behind a channel, so a *session* can only reach it through process
 /// state — and process state that is typed and lock-guarded beats the `set_var` pattern the
 /// backend-select still uses (security-review 2026-06-28 #7).
 static ABSOLUTE_ANCHOR: std::sync::RwLock<Option<AbsoluteAnchor>> = std::sync::RwLock::new(None);
 /// Anchor absolute coordinates at a specific output. `None` (the default) keeps the size-matched
 /// behavior.
 ///
 /// ⚠️ **This is a HOST-level pin, not per-session state.** The injector is host-lifetime and every
 /// concurrent session's input flows through the same one, so an anchor set per session would apply
 /// to all of them — the last connect silently re-aiming everyone else's pointer. That is fine for
 /// what this exists for (`PUNKTFUNK_CAPTURE_MONITOR`, a host-wide pin — the host-pinned decision of
 /// record in `design/per-monitor-portal-capture.md` §5.3) and wrong for anything per-client. A
 /// per-session anchor needs the injector to become session-aware first; don't call this from a
 /// session path until it is.
 pub fn set_absolute_anchor(anchor: Option<AbsoluteAnchor>) {
    let anchor = anchor.filter(|a| !a.is_empty());
    tracing::debug!(?anchor, "input: absolute-coordinate anchor set");
    *ABSOLUTE_ANCHOR.write().unwrap_or_else(|e| e.into_inner()) = anchor;
 }
 /// The anchor an injector should map absolute coordinates into, if any.
 pub fn absolute_anchor() -> Option<AbsoluteAnchor> {
    ABSOLUTE_ANCHOR
        .read()
        .unwrap_or_else(|e| e.into_inner())
        .clone()
 }
 /// Pick the injection backend for the current session. gamescope hosts its own EIS server (no
 /// portal), so a gamescope session injects directly into it. wlroots/Sway only implements the
 /// ScreenCast portal (no RemoteDesktop), so libei can't run there — use the wlr virtual-input
@@ -288,8 +288,35 @@ pub fn rebuild_probe_active() -> bool {
    REBUILD_PROBES.load(std::sync::atomic::Ordering::SeqCst) > 0
 }
 /// The monitor this host mirrors instead of creating a virtual display, or `None` for the normal
 /// virtual-display path.
 ///
 /// Precedence: **`PUNKTFUNK_CAPTURE_MONITOR` wins over the stored policy.** An appliance pins in
 /// `host.env` and must stay pinned there — a console click (or a stale settings file) should not be
 /// able to re-aim a machine whose operator declared the answer in its unit's environment. With the
 /// env unset, the console's persisted choice applies, which is what makes a picker possible at all:
 /// the env is read once at startup, so it could never be what a UI writes.
 ///
 /// Read per `open` rather than cached, so a console change takes effect on the next session instead
 /// of at the next host restart.
 pub fn capture_monitor() -> Option<String> {
    if let Some(env) = pf_host_config::config().capture_monitor.as_deref() {
        return Some(env.to_string());
    }
    policy::prefs().get().capture_monitor
 }
 /// Open the virtual-display driver for `compositor`.
 ///
 /// A [`capture_monitor`] pin routes to the **mirror** backend instead: the host streams that
 /// physical head and creates no virtual display at all. Deliberately resolved here, at the one place
 /// every session opens a display, so the pin can't be honored on one plane and ignored on another —
 /// it is a host-wide setting (`design/per-monitor-portal-capture.md` §5.3).
 pub fn open(compositor: Compositor) -> Result<Box<dyn VirtualDisplay>> {
    #[cfg(target_os = "linux")]
    if let Some(connector) = capture_monitor() {
        return Ok(Box::new(mirror::MirrorDisplay::new(compositor, connector)?));
    }
    #[cfg(target_os = "linux")]
    {
        match compositor {
@@ -321,6 +348,18 @@ pub fn open(compositor: Compositor) -> Result<Box<dyn VirtualDisplay>> {
    }
 }
 /// Open the **mirror** backend for a specific monitor, bypassing the `PUNKTFUNK_CAPTURE_MONITOR`
 /// pin that [`open`] consults. For tools that name the head explicitly (`punktfunk-host
 /// mirror-test`) — the pin can't serve them, since `pf_host_config` parses the environment once at
 /// startup, so a tool setting the variable for itself would be reading a snapshot taken before it.
 #[cfg(target_os = "linux")]
 pub fn open_mirror(compositor: Compositor, connector: &str) -> Result<Box<dyn VirtualDisplay>> {
    Ok(Box::new(mirror::MirrorDisplay::new(
        compositor,
        connector.to_string(),
    )?))
 }
 /// Readiness probe for `compositor`: is it up and able to create a virtual output *right
 /// now*? A session-bringup script polls this (via `punktfunk-host probe-compositor`) to gate
 /// on actual readiness instead of racing the compositor with a blind sleep.
@@ -359,6 +398,21 @@ pub fn probe(compositor: Compositor) -> Result<()> {
 #[path = "vdisplay/policy.rs"]
 pub mod policy;
 // Read-only physical-monitor enumeration (the heads the compositor ALREADY has — not ours), for
 // pinning capture at one of them + the console picker. Platform-neutral facade; the per-backend
 // reads live beside the code that already speaks each dialect. See
 // `design/per-monitor-portal-capture.md` §5.1.
 #[path = "vdisplay/monitors.rs"]
 pub mod monitors;
 // The monitor-mirror backend: stream a head the compositor ALREADY has (the
 // `PUNKTFUNK_CAPTURE_MONITOR` pin) instead of creating one. Implements `VirtualDisplay` so the
 // session machinery is unchanged, but reports `DisplayOwnership::External` so none of the
 // virtual-display lifecycle policy is applied to someone else's monitor.
 #[cfg(target_os = "linux")]
 #[path = "vdisplay/mirror.rs"]
 mod mirror;
 // The pure per-display lifecycle state machine (refcount + linger + pin), platform-neutral and
 // property-tested; the registry executes the side effects its transitions dictate.
 #[path = "vdisplay/lifecycle.rs"]
@@ -174,25 +174,12 @@ impl VirtualDisplay for HyprlandDisplay {
        set_monitor_rule(&name, mode).with_context(|| format!("set monitor rule for {name}"))?;
        // Steer xdph's custom picker at our new output, then run the portal handshake on its own
-        // thread (it parks to keep the cast alive, like the other backends).
+        // thread (it parks to keep the cast alive, like the other backends). Serialized: the
-        ensure_xdph_config()?;
+        // selection is one per-user file, so a concurrent session's write between ours and xdph's
-        let sel = selection_file();
+        // read would silently capture the wrong output (see `SELECTION_LOCK`).
-        std::fs::write(&sel, picker_selection_line(&name))
+        let (fd, node_id, stop) = {
-            .with_context(|| format!("write {sel}"))?;
+            let _sel = SELECTION_LOCK.lock().unwrap_or_else(|e| e.into_inner());
-
+            select_and_cast(&name, self.hw_cursor)?
        let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<(OwnedFd, u32), String>>();
        let stop = Arc::new(AtomicBool::new(false));
        let stop_thread = stop.clone();
        let hw_cursor = self.hw_cursor;
        thread::Builder::new()
            .name("punktfunk-hypr-vout".into())
            .spawn(move || portal_thread(setup_tx, stop_thread, hw_cursor))
            .context("spawn hyprland portal thread")?;
        let (fd, node_id) = match setup_rx.recv_timeout(Duration::from_secs(20)) {
            Ok(Ok(v)) => v,
            Ok(Err(e)) => bail!("ScreenCast portal on {name} failed: {e}"),
            Err(_) => bail!("timed out waiting for the ScreenCast portal on {name}"),
        };
        tracing::info!(
            node_id,
@@ -272,6 +259,102 @@ fn hyprctl(args: &[&str]) -> Result<String> {
    Ok(String::from_utf8_lossy(&out.stdout).into_owned())
 }
 /// Serializes **write-the-selection → complete-the-handshake**, process-wide — see the wlroots
 /// backend's `SELECTION_LOCK`. The xdph selection is likewise one per-user file, so a concurrent
 /// write between ours and xdph's read would silently steer capture at the other session's output.
 static SELECTION_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());
 /// Point xdph's custom picker at `output` and run the ScreenCast handshake, returning the portal fd
 /// + node id and the guard that stops the cast. The caller must hold [`SELECTION_LOCK`].
 fn select_and_cast(output: &str, hw_cursor: bool) -> Result<(OwnedFd, u32, Arc<AtomicBool>)> {
    ensure_xdph_config()?;
    let sel = selection_file();
    std::fs::write(&sel, picker_selection_line(output)).with_context(|| format!("write {sel}"))?;
    let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<(OwnedFd, u32), String>>();
    let stop = Arc::new(AtomicBool::new(false));
    let stop_thread = stop.clone();
    thread::Builder::new()
        .name("punktfunk-hypr-cast".into())
        .spawn(move || portal_thread(setup_tx, stop_thread, hw_cursor))
        .context("spawn hyprland portal thread")?;
    match setup_rx.recv_timeout(Duration::from_secs(20)) {
        Ok(Ok((fd, node_id))) => Ok((fd, node_id, stop)),
        Ok(Err(e)) => bail!("ScreenCast portal on {output} failed: {e}"),
        Err(_) => bail!("timed out waiting for the ScreenCast portal on {output}"),
    }
 }
 /// Record an **existing** Hyprland monitor — the monitor-mirror path
 /// (`design/per-monitor-portal-capture.md` L3): the same custom-picker mechanism the virtual-output
 /// path uses, pointed at a physical connector, so no GUI picker is involved.
 ///
 /// The keepalive stops the cast only — the monitor is Hyprland's, not ours.
 pub(crate) fn stream_existing_output(
    connector: &str,
    hw_cursor: bool,
 ) -> Result<crate::mirror::MirrorStream> {
    let _sel = SELECTION_LOCK.lock().unwrap_or_else(|e| e.into_inner());
    let (fd, node_id, stop) = select_and_cast(connector, hw_cursor)?;
    Ok(crate::mirror::MirrorStream {
        node_id,
        remote_fd: Some(fd),
        keepalive: Box::new(StopGuard(stop)),
    })
 }
 /// Every head Hyprland reports, for [`crate::monitors::list`].
 ///
 /// `hyprctl -j monitors all` (rather than plain `monitors`) so **disabled** heads are listed too —
 /// a picker that silently omits the monitor the operator is trying to name is worse than one that
 /// shows it greyed out. Hyprland reports geometry post-transform in logical pixels, which is the
 /// space `crate::monitors` documents.
 pub(crate) fn list_monitors() -> Result<Vec<crate::monitors::PhysicalMonitor>> {
    let raw = hyprctl(&["-j", "monitors", "all"])?;
    let parsed: serde_json::Value =
        serde_json::from_str(&raw).context("parse hyprctl -j monitors all")?;
    let mut out: Vec<_> = parsed
        .as_array()
        .context("hyprctl monitors: not an array")?
        .iter()
        .filter_map(|m| {
            let connector = m.get("name")?.as_str()?.to_string();
            let num = |k: &str| m.get(k).and_then(|v| v.as_i64()).unwrap_or(0);
            // Hyprland's `description` is already a "make model (connector)" string; treat it as
            // the make and let the shared helper drop it when it is empty/Unknown.
            let description = crate::monitors::describe(
                m.get("description").and_then(|v| v.as_str()).unwrap_or(""),
                "",
                &connector,
            );
            Some(crate::monitors::PhysicalMonitor {
                connector,
                description,
                width: num("width").max(0) as u32,
                height: num("height").max(0) as u32,
                // `refreshRate` is Hz as a float.
                refresh_mhz: (m.get("refreshRate").and_then(|v| v.as_f64()).unwrap_or(0.0) * 1000.0)
                    as u32,
                x: num("x") as i32,
                y: num("y") as i32,
                scale: m
                    .get("scale")
                    .and_then(|v| v.as_f64())
                    .filter(|s| *s > 0.0)
                    .unwrap_or(1.0),
                primary: m.get("focused").and_then(|v| v.as_bool()).unwrap_or(false),
                enabled: !m.get("disabled").and_then(|v| v.as_bool()).unwrap_or(false),
                // Our headless outputs are named `PF-<n>` (see `next_output_name`).
                managed: m
                    .get("name")
                    .and_then(|v| v.as_str())
                    .is_some_and(|n| n.starts_with("PF-")),
            })
        })
        .collect();
    out.sort_by_key(|m| (m.x, m.y, m.connector.clone()));
    Ok(out)
 }
 /// Run a `hyprctl` **dispatch** command (`output …`, `keyword …`, `eval …`) that reports success by
 /// printing `ok`. hyprctl often exits 0 even when the command is rejected, printing the error to
 /// stdout, so treat a known error marker as failure (this is also how [`set_monitor_rule`] tells the
@@ -32,6 +32,7 @@ use std::sync::mpsc::Sender;
 use std::sync::Arc;
 use std::thread;
 use std::time::Duration;
 use wayland_client::protocol::wl_output::{self, WlOutput};
 use wayland_client::protocol::wl_registry::{self, WlRegistry};
 use wayland_client::{Connection, Dispatch, Proxy, QueueHandle};
@@ -914,6 +915,10 @@ struct State {
    node_id: Option<u32>,
    failed: Option<String>,
    closed: bool,
    /// Every `wl_output` KWin advertises, keyed by the proxy, with its connector name once the
    /// `name` event arrives. Only the monitor-mirror path ([`stream_existing_output`]) needs these
    /// — `stream_output` takes a `wl_output` object, so the connector has to be resolved to one.
    outputs: Vec<(WlOutput, Option<String>)>,
 }
 impl Dispatch<WlRegistry, ()> for State {
@@ -934,6 +939,34 @@ impl Dispatch<WlRegistry, ()> for State {
            if interface == Screencast::interface().name {
                let v = version.min(MAX_VERSION);
                state.screencast = Some(registry.bind::<Screencast, _, _>(name, v, qh, ()));
            } else if interface == WlOutput::interface().name {
                // v4 is where `wl_output.name` (the connector) arrives; bind at least that when the
                // compositor offers it, else bind what it has and let the resolve fail loudly
                // rather than mirroring an unidentifiable head.
                let v = version.min(WL_OUTPUT_MAX_VERSION);
                let out = registry.bind::<WlOutput, _, _>(name, v, qh, ());
                state.outputs.push((out, None));
            }
        }
    }
 }
 /// `wl_output` version we bind at: 4 brings the `name` event carrying the connector
 /// (`DP-1`, …) — the only way to tell KWin's outputs apart on this connection.
 const WL_OUTPUT_MAX_VERSION: u32 = 4;
 impl Dispatch<WlOutput, ()> for State {
    fn event(
        state: &mut Self,
        output: &WlOutput,
        event: wl_output::Event,
        _: &(),
        _: &Connection,
        _: &QueueHandle<Self>,
    ) {
        if let wl_output::Event::Name { name } = event {
            if let Some(slot) = state.outputs.iter_mut().find(|(o, _)| o == output) {
                slot.1 = Some(name);
            }
        }
    }
@@ -988,6 +1021,55 @@ fn virtual_output_thread(
    }
 }
 /// Start recording the existing KWin output named `connector` (the monitor-mirror path), returning
 /// its PipeWire node id and the keepalive whose drop stops the recording.
 ///
 /// `hw_cursor` selects the pointer mode exactly as the virtual-output path does: metadata for a
 /// cursor-channel session, embedded otherwise, so the cursor behaves the same whichever source a
 /// session is on.
 pub(crate) fn stream_existing_output(
    connector: &str,
    hw_cursor: bool,
 ) -> Result<crate::mirror::MirrorStream> {
    let pointer_mode = if hw_cursor {
        POINTER_METADATA
    } else {
        POINTER_EMBEDDED
    };
    let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<u32, String>>();
    let stop = Arc::new(AtomicBool::new(false));
    let stop_thread = stop.clone();
    let connector_thread = connector.to_string();
    thread::Builder::new()
        .name("punktfunk-kwin-mirror".into())
        .spawn(move || {
            if let Err(e) = run_existing(&connector_thread, pointer_mode, &setup_tx, &stop_thread) {
                let _ = setup_tx.send(Err(format!("{e:#}")));
            }
        })
        .context("spawn KWin monitor-mirror thread")?;
    let node_id = match setup_rx.recv_timeout(Duration::from_secs(20)) {
        Ok(Ok(v)) => v,
        Ok(Err(e)) => bail!("KWin monitor mirror failed: {e}"),
        Err(_) => bail!("timed out recording the KWin output {connector:?}"),
    };
    Ok(crate::mirror::MirrorStream {
        node_id,
        // KWin publishes on the user's own PipeWire daemon — no portal remote to carry.
        remote_fd: None,
        keepalive: Box::new(StopOnDrop(stop)),
    })
 }
 /// Stops the mirror thread (and thus the recording) when the capturer drops it.
 struct StopOnDrop(Arc<AtomicBool>);
 impl Drop for StopOnDrop {
    fn drop(&mut self) {
        self.0.store(true, Ordering::Relaxed);
    }
 }
 /// Readiness probe: connect to the KWin Wayland socket, roundtrip the registry, and confirm
 /// the privileged `zkde_screencast` global is actually advertised. This is exactly what
 /// [`run`] needs before it can create a virtual output, so a session-bringup script can poll
@@ -1019,6 +1101,106 @@ pub fn is_available() -> bool {
    probe().is_ok()
 }
 /// Stream an **existing** KWin output — the monitor-mirror path
 /// (`design/per-monitor-portal-capture.md` L1). Same privileged global and the same thread/keepalive
 /// shape as the virtual-output path; `stream_output` simply takes a `wl_output` instead of minting
 /// one, so there is no dialog, no portal, and no chooser: the connector name IS the selection.
 ///
 /// Returns the PipeWire node id. The thread parks until `stop`, holding the Wayland connection that
 /// is the cast's lifetime — dropping it stops the recording and leaves the monitor untouched (we
 /// never created it, so there is nothing to tear down; §7.1).
 fn run_existing(
    connector: &str,
    pointer_mode: u32,
    setup_tx: &Sender<Result<u32, String>>,
    stop: &AtomicBool,
 ) -> Result<()> {
    let conn = Connection::connect_to_env()
        .context("connect to KWin Wayland (is WAYLAND_DISPLAY set to the KWin socket?)")?;
    let mut queue = conn.new_event_queue();
    let qh = queue.handle();
    let _registry = conn.display().get_registry(&qh, ());
    let mut state = State::default();
    // Two roundtrips: the first processes the globals (binding screencast + every wl_output), the
    // second drains each output's property burst — the `name` event we resolve the connector by.
    queue.roundtrip(&mut state).context("registry roundtrip")?;
    queue
        .roundtrip(&mut state)
        .context("wl_output property roundtrip")?;
    let screencast = state.screencast.clone().ok_or_else(|| {
        anyhow!(
            "KWin does not expose zkde_screencast_unstable_v1 to this client — install the host's \
             .desktop (io.unom.Punktfunk.Host.desktop, X-KDE-Wayland-Interfaces) and re-login so \
             KWin authorizes it, or run KWin with KWIN_WAYLAND_NO_PERMISSION_CHECKS=1 (headless test)"
        )
    })?;
    // Resolve the connector to a bound wl_output. A miss is a hard error naming what IS there:
    // mirroring some other monitor because the requested one is unplugged shows the operator a
    // screen they did not ask for, which is worse than a session that refuses with a reason.
    let named: Vec<&str> = state
        .outputs
        .iter()
        .filter_map(|(_, n)| n.as_deref())
        .collect();
    let output = state
        .outputs
        .iter()
        .find(|(_, n)| n.as_deref() == Some(connector))
        .or_else(|| {
            state.outputs.iter().find(|(_, n)| {
                n.as_deref()
                    .is_some_and(|n| n.eq_ignore_ascii_case(connector))
            })
        })
        .map(|(o, _)| o.clone())
        .ok_or_else(|| {
            if named.is_empty() {
                anyhow!(
                    "KWin advertised no named wl_output (needs wl_output v4 for the connector \
                     name) — cannot mirror {connector:?}"
                )
            } else {
                anyhow!(
                    "KWin has no output named {connector:?} — it has: {}",
                    named.join(", ")
                )
            }
        })?;
    let stream = screencast.stream_output(&output, pointer_mode, &qh, ());
    tracing::info!(
        connector,
        embedded_pointer = pointer_mode != POINTER_METADATA,
        "KWin: recording an existing output; awaiting PipeWire node"
    );
    let node_id = loop {
        queue
            .blocking_dispatch(&mut state)
            .context("wayland dispatch (awaiting created)")?;
        if let Some(node) = state.node_id {
            break node;
        }
        if let Some(e) = state.failed.take() {
            bail!("stream_output failed: {e}");
        }
        if state.closed {
            bail!("KWin closed the stream before it was created");
        }
    };
    setup_tx
        .send(Ok(node_id))
        .map_err(|_| anyhow!("monitor-mirror opener went away"))?;
    park_until_stopped(&conn, &mut queue, &mut state, stop, connector, node_id)?;
    stream.close();
    let _ = conn.flush();
    Ok(())
 }
 fn run(
    width: u32,
    height: u32,
@@ -1080,15 +1262,31 @@ fn run(
        .send(Ok(node_id))
        .map_err(|_| anyhow!("virtual-output opener went away"))?;
-    // Keep the connection (and thus the virtual output) alive until told to stop, observing
+    park_until_stopped(&conn, &mut queue, &mut state, stop, name, node_id)?;
-    // `closed`. blocking_dispatch can't be interrupted, so poll the connection fd with a short
+
-    // timeout so `stop` is honored within ~200 ms.
+    // Best-effort clean teardown; dropping the connection also makes KWin reclaim the output.
    stream.close();
    let _ = conn.flush();
    Ok(())
 }
 /// Keep the connection (and thus the stream) alive until told to stop, observing `closed`.
 /// `blocking_dispatch` can't be interrupted, so poll the connection fd with a short timeout and
 /// honor `stop` within ~200 ms. Shared by the virtual-output and monitor-mirror paths — for a
 /// virtual output this connection IS the output's lifetime; for a mirror it is only the
 /// recording's, and the monitor itself is untouched either way.
 fn park_until_stopped(
    conn: &Connection,
    queue: &mut wayland_client::EventQueue<State>,
    state: &mut State,
    stop: &AtomicBool,
    output: &str,
    node_id: u32,
 ) -> Result<()> {
    while !stop.load(Ordering::Relaxed) {
-        queue
+        queue.dispatch_pending(state).context("dispatch_pending")?;
            .dispatch_pending(&mut state)
            .context("dispatch_pending")?;
        if state.closed {
-            tracing::warn!(output = %name, node_id, "KWin closed the virtual-output stream");
+            tracing::warn!(output = %output, node_id, "KWin closed the screencast stream");
            break;
        }
        conn.flush().context("wayland flush")?;
@@ -1110,10 +1308,6 @@ fn run(
            let _ = guard.read();
        } // else: timeout or signal — drop the guard, re-check `stop`
    }
    // Best-effort clean teardown; dropping the connection also makes KWin reclaim the output.
    stream.close();
    let _ = conn.flush();
    Ok(())
 }
@@ -69,6 +69,9 @@ pub mod management {
 }
 use device::kde_output_device_mode_v2::{Event as ModeEvent, KdeOutputDeviceModeV2 as DeviceMode};
 use device::kde_output_device_registry_v2::{
    Event as RegistryEvent, KdeOutputDeviceRegistryV2 as DeviceRegistry,
 };
 use device::kde_output_device_v2::{Event as DeviceEvent, KdeOutputDeviceV2 as OutputDevice};
 use management::kde_mode_list_v2::KdeModeListV2 as ModeList;
 use management::kde_output_configuration_v2::{
@@ -82,10 +85,16 @@ use management::kde_output_management_v2::KdeOutputManagementV2 as OutputManagem
 /// always in range on any KWin that advertises the globals.
 const MGMT_MAX: u32 = 22;
 const DEVICE_MAX: u32 = 24;
 /// `kde_output_device_registry_v2` — the newer way KWin hands out output devices (verified live on
 /// KWin 6.7.3, which advertises this at v23 and NO per-output `kde_output_device_v2` globals).
 const DEVICE_REGISTRY_MAX: u32 = 24;
 /// The opcode of `kde_output_device_v2.mode` (0-based event index) — the event that creates a child
 /// `kde_output_device_mode_v2`. Kept in sync with the vendored `kde-output-device-v2.xml`.
 const DEVICE_MODE_EVENT_OPCODE: u16 = 2;
 /// The opcode of `kde_output_device_registry_v2.output` — the event that creates a child
 /// `kde_output_device_v2`. `finished` is event 0, `output` is event 1.
 const REGISTRY_OUTPUT_EVENT_OPCODE: u16 = 1;
 /// Overall budget for one enumerate-then-apply operation. Generous next to a healthy roundtrip (a
 /// few ms); it exists only so a wedged compositor can't pin the session's stream thread.
@@ -131,6 +140,14 @@ struct DeviceState {
    name: Option<String>,
    uuid: Option<String>,
    enabled: bool,
    /// Top-left in the compositor's global logical space, from the `geometry` event — the key that
    /// makes a head identifiable when two of them share a size (`monitors::PhysicalMonitor`).
    position: (i32, i32),
    /// `make` / `model` from the same event, for the picker label.
    make: Option<String>,
    model: Option<String>,
    /// Logical scale from the `scale` event. `None` ⇒ the protocol's documented default of 1.
    scale: Option<f64>,
    /// KWin's output priority; 1 is the primary. `None` until the `priority` event (device ≥ v18).
    priority: Option<u32>,
    /// The `current_mode` object id; its size is looked up in [`State::mode_dims`].
@@ -148,6 +165,9 @@ struct DeviceState {
 struct State {
    management: Option<OutputManagement>,
    mgmt_name_version: Option<(u32, u32)>,
    /// The `kde_output_device_registry_v2` on KWin ≥ 6.7, held so it keeps announcing outputs for
    /// the life of the session (dropping it would end the announcements).
    device_registry: Option<DeviceRegistry>,
    devices: HashMap<ObjectId, DeviceState>,
    /// mode object id → `(width, height, refresh_mHz)`.
    mode_dims: HashMap<ObjectId, (u32, u32, u32)>,
@@ -185,6 +205,17 @@ impl Dispatch<WlRegistry, ()> for State {
                    let dev = registry.bind::<OutputDevice, _, _>(name, v, qh, name);
                    let id = dev.id();
                    state.devices.entry(id).or_default().proxy = Some(dev);
                } else if interface == DeviceRegistry::interface().name {
                    // KWin ≥ 6.7 (Plasma 6.7.3 verified) no longer advertises ONE
                    // `kde_output_device_v2` global per output — it advertises this registry and
                    // hands the devices out through its `output` events instead. Binding it is what
                    // makes this whole module work on a current KWin: without it the device list
                    // comes back EMPTY, which reads as "no outputs" and silently degrades every
                    // topology apply to the `kscreen-doctor` shell-out this module exists to avoid.
                    // Both models are kept — the per-output globals are still what older KWin sends.
                    let v = version.min(DEVICE_REGISTRY_MAX);
                    state.device_registry =
                        Some(registry.bind::<DeviceRegistry, _, _>(name, v, qh, ()));
                }
            }
            wl_registry::Event::GlobalRemove { .. } => {}
@@ -193,6 +224,30 @@ impl Dispatch<WlRegistry, ()> for State {
    }
 }
 /// The device registry hands out one `kde_output_device_v2` per output via its `output` event
 /// (a `new_id`, so the child is created by the `event_created_child!` binding below). Devices that
 /// arrive this way have no global `name` number — the newest-wins supersede tie-break uses 0 for
 /// them, which is fine: that tie-break only matters for the per-output-global model.
 impl Dispatch<DeviceRegistry, ()> for State {
    fn event(
        state: &mut Self,
        _: &DeviceRegistry,
        event: RegistryEvent,
        _: &(),
        _: &Connection,
        _: &QueueHandle<Self>,
    ) {
        if let RegistryEvent::Output { output } = event {
            let id = output.id();
            state.devices.entry(id).or_default().proxy = Some(output);
        }
    }
    event_created_child!(State, DeviceRegistry, [
        REGISTRY_OUTPUT_EVENT_OPCODE => (OutputDevice, 0u32),
    ]);
 }
 // Management has no events.
 impl Dispatch<OutputManagement, ()> for State {
    fn event(
@@ -237,6 +292,15 @@ impl Dispatch<OutputDevice, u32> for State {
        match event {
            DeviceEvent::Name { name } => entry.name = Some(name),
            DeviceEvent::Uuid { uuid } => entry.uuid = Some(uuid),
            DeviceEvent::Geometry {
                x, y, make, model, ..
            } => {
                entry.position = (x, y);
                entry.make = Some(make);
                entry.model = Some(model);
            }
            // `fixed` decodes to f64 in wayland-rs.
            DeviceEvent::Scale { factor } => entry.scale = Some(factor),
            DeviceEvent::Enabled { enabled } => entry.enabled = enabled != 0,
            DeviceEvent::Priority { priority } => entry.priority = Some(priority),
            DeviceEvent::CurrentMode { mode } => entry.current_mode = Some(mode.id()),
@@ -349,6 +413,15 @@ impl Session {
        if !s.sync_barrier(deadline) {
            return None;
        }
        // Phase 3 (KWin ≥ 6.7, the registry model): the devices themselves only arrive as the
        // registry's `output` events during phase 2, so their property bursts are one round further
        // out than they are for per-output globals. One more barrier — skipped when no device is
        // still waiting for its `done`, so the classic path costs nothing.
        if s.state.device_registry.is_some() && s.state.devices.values().any(|d| !d.seen_done) {
            if !s.sync_barrier(deadline) {
                return None;
            }
        }
        Some(s)
    }
@@ -455,6 +528,54 @@ fn mode_spec(dims: (u32, u32, u32)) -> String {
 /// treated as a physical to disable, and its primary is never stolen (first-slot-wins).
 const MANAGED_PREFIX: &str = "Virtual-punktfunk";
 /// Every head KWin reports, for [`crate::monitors::list`].
 ///
 /// Reuses the same bounded enumerate-only session the topology path opens — no configuration is
 /// built and nothing is applied, so this is a pure read. A device that never completed its `done`
 /// burst is skipped rather than reported half-read (its geometry would be a guess, and geometry is
 /// exactly what callers key on).
 pub(crate) fn list_monitors() -> anyhow::Result<Vec<crate::monitors::PhysicalMonitor>> {
    let session = Session::open().ok_or_else(|| {
        anyhow::anyhow!(
            "KWin did not answer kde_output_management_v2 (not a KWin session, the protocol is \
             not advertised to this client, or the compositor is wedged)"
        )
    })?;
    let mut out: Vec<_> = session
        .state
        .devices
        .values()
        .filter(|d| d.seen_done)
        .filter_map(|d| {
            let connector = d.name.clone()?;
            let dims = session.current_dims(d);
            Some(crate::monitors::PhysicalMonitor {
                managed: connector.starts_with(MANAGED_PREFIX),
                description: crate::monitors::describe(
                    d.make.as_deref().unwrap_or(""),
                    d.model.as_deref().unwrap_or(""),
                    &connector,
                ),
                // A disabled output has no current mode — report 0s rather than inventing one.
                width: dims.map(|d| d.0).unwrap_or(0),
                height: dims.map(|d| d.1).unwrap_or(0),
                refresh_mhz: dims.map(|d| d.2).unwrap_or(0),
                x: d.position.0,
                y: d.position.1,
                scale: d.scale.filter(|s| *s > 0.0).unwrap_or(1.0),
                // KWin ranks outputs; 1 is the primary.
                primary: d.priority == Some(1),
                enabled: d.enabled,
                connector,
            })
        })
        .collect();
    // The device globals arrive in bind order, which is not stable across runs; sort by desktop
    // position so a picker (and a log line) reads left-to-right the way the desk looks.
    out.sort_by_key(|m| (m.x, m.y, m.connector.clone()));
    Ok(out)
 }
 /// Make the streamed output (name starts with `our_prefix`, current size `our_w`×`our_h`) the
 /// primary — and, for `Exclusive`, disable every other enabled output — over `kde_output_management_v2`.
 /// See the module docs for why this is done in-process instead of via `kscreen-doctor`.
@@ -817,4 +938,12 @@ mod tests {
    fn mode_event_opcode_is_two() {
        assert_eq!(DEVICE_MODE_EVENT_OPCODE, 2);
    }
    /// Same hazard for the registry's `output` event (`finished` is 0, `output` is 1): the
    /// `event_created_child!` binding hardcodes the opcode, so a reorder in the vendored XML would
    /// bind the child to the wrong event and produce outputs with no properties.
    #[test]
    fn registry_output_event_opcode_is_one() {
        assert_eq!(REGISTRY_OUTPUT_EVENT_OPCODE, 1);
    }
 }
@@ -376,6 +376,190 @@ fn session_thread(
    });
 }
 /// Record an **existing** monitor by connector — the monitor-mirror path
 /// (`design/per-monitor-portal-capture.md` L2). Returns the PipeWire node id and the keepalive
 /// whose drop stops the recording.
 ///
 /// Same private ScreenCast API as the virtual path, one call different: `RecordMonitor` instead of
 /// `RecordVirtual`. So it inherits what makes that path work headlessly — Mutter's *direct* D-Bus
 /// API needs no interactive approval, unlike the xdg portal a background service could never answer.
 ///
 /// Deliberately **not** under [`TOPOLOGY_LOCK`]: that lock serializes operations which add/remove a
 /// monitor or apply a monitor configuration, and mirroring does neither. It creates nothing, changes
 /// no layout, and leaves the head exactly as its owner set it.
 pub(crate) fn stream_existing_output(
    connector: &str,
    hw_cursor: bool,
 ) -> Result<crate::mirror::MirrorStream> {
    let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<u32, String>>();
    let stop = Arc::new(AtomicBool::new(false));
    let stop_thread = stop.clone();
    let connector_thread = connector.to_string();
    thread::Builder::new()
        .name("punktfunk-mutter-mirror".into())
        .spawn(move || mirror_thread(setup_tx, stop_thread, connector_thread, hw_cursor))
        .context("spawn Mutter monitor-mirror thread")?;
    let node_id = match setup_rx.recv_timeout(Duration::from_secs(20)) {
        Ok(Ok(v)) => v,
        Ok(Err(e)) => bail!("Mutter monitor mirror failed: {e}"),
        Err(_) => bail!("timed out recording the Mutter output {connector:?}"),
    };
    Ok(crate::mirror::MirrorStream {
        node_id,
        // Mutter's RecordMonitor node lives on the user's PipeWire daemon (like RecordVirtual).
        remote_fd: None,
        keepalive: Box::new(MirrorStop(stop)),
    })
 }
 /// Stops the mirror thread — and with it the recording — when the capturer drops it.
 struct MirrorStop(Arc<AtomicBool>);
 impl Drop for MirrorStop {
    fn drop(&mut self) {
        self.0.store(true, Ordering::Relaxed);
    }
 }
 /// Owns the D-Bus connection behind a mirrored monitor's cast: connect, hand back the node id,
 /// park until stopped, then `Stop` the session.
 fn mirror_thread(
    setup_tx: Sender<Result<u32, String>>,
    stop: Arc<AtomicBool>,
    connector: String,
    hw_cursor: bool,
 ) {
    let rt = match tokio::runtime::Builder::new_multi_thread()
        .worker_threads(1)
        .enable_all()
        .build()
    {
        Ok(rt) => rt,
        Err(e) => {
            let _ = setup_tx.send(Err(format!("build tokio runtime: {e}")));
            return;
        }
    };
    rt.block_on(async move {
        let session = match connect_monitor(&connector, hw_cursor).await {
            Ok(s) => s,
            Err(e) => {
                let _ = setup_tx.send(Err(format!("{e:#}")));
                return;
            }
        };
        let _ = setup_tx.send(Ok(session.node_id));
        while !stop.load(Ordering::Relaxed) {
            tokio::time::sleep(Duration::from_millis(200)).await;
        }
        // Stop the cast. Nothing else to undo: no virtual output was added, so there is no monitor
        // removal for Mutter to rebuild around — the SIGSEGV-adjacent teardown ordering the virtual
        // path has to observe simply doesn't arise here.
        let _ = session.rd_session.call_method("Stop", &()).await;
    });
 }
 /// The `RecordMonitor` handshake: RemoteDesktop session → ScreenCast session anchored to it →
 /// record `connector` → node id on `PipeWireStreamAdded` after `Start`.
 async fn connect_monitor(connector: &str, hw_cursor: bool) -> Result<MutterSession> {
    let conn = zbus::Connection::session()
        .await
        .context("connect session D-Bus")?;
    let rd = zbus::Proxy::new(
        &conn,
        BUS_RD,
        "/org/gnome/Mutter/RemoteDesktop",
        "org.gnome.Mutter.RemoteDesktop",
    )
    .await
    .context("RemoteDesktop proxy (is gnome-shell running?)")?;
    let rd_path: OwnedObjectPath = rd
        .call("CreateSession", &())
        .await
        .context("RemoteDesktop.CreateSession")?;
    let rd_session = zbus::Proxy::new(
        &conn,
        BUS_RD,
        rd_path,
        "org.gnome.Mutter.RemoteDesktop.Session",
    )
    .await?;
    let session_id: String = rd_session
        .get_property("SessionId")
        .await
        .context("read SessionId")?;
    let sc = zbus::Proxy::new(
        &conn,
        BUS_SC,
        "/org/gnome/Mutter/ScreenCast",
        "org.gnome.Mutter.ScreenCast",
    )
    .await
    .context("ScreenCast proxy")?;
    let mut props: HashMap<&str, Value> = HashMap::new();
    props.insert("remote-desktop-session-id", Value::from(session_id));
    let sc_path: OwnedObjectPath = sc
        .call("CreateSession", &(props,))
        .await
        .context("ScreenCast.CreateSession")?;
    let sc_session = zbus::Proxy::new(
        &conn,
        BUS_SC,
        sc_path,
        "org.gnome.Mutter.ScreenCast.Session",
    )
    .await?;
    // `RecordMonitor(connector, properties) -> stream_path`. Only `cursor-mode` is set: the mode
    // belongs to the monitor's owner, not to us.
    let mut rec: HashMap<&str, Value> = HashMap::new();
    rec.insert(
        "cursor-mode",
        Value::from(if hw_cursor {
            CURSOR_METADATA
        } else {
            CURSOR_EMBEDDED
        }),
    );
    let stream_path: OwnedObjectPath = sc_session
        .call("RecordMonitor", &(connector, rec))
        .await
        .with_context(|| format!("Session.RecordMonitor({connector:?})"))?;
    let stream = zbus::Proxy::new(
        &conn,
        BUS_SC,
        stream_path,
        "org.gnome.Mutter.ScreenCast.Stream",
    )
    .await?;
    let mut added = stream
        .receive_signal("PipeWireStreamAdded")
        .await
        .context("subscribe PipeWireStreamAdded")?;
    rd_session
        .call_method("Start", &())
        .await
        .context("RemoteDesktop.Session.Start")?;
    let msg = tokio::time::timeout(Duration::from_secs(10), added.next())
        .await
        .map_err(|_| anyhow!("PipeWireStreamAdded did not arrive within 10s"))?
        .ok_or_else(|| anyhow!("signal stream ended before PipeWireStreamAdded"))?;
    let (node_id,): (u32,) = msg
        .body()
        .deserialize()
        .context("PipeWireStreamAdded body")?;
    tracing::info!(connector, node_id, "mutter: recording an existing monitor");
    Ok(MutterSession {
        rd_session,
        _sc_session: sc_session,
        _conn: conn,
        node_id,
    })
 }
 /// The live session objects (held for the stream's lifetime) + the PipeWire node id.
 struct MutterSession {
    rd_session: zbus::Proxy<'static>,
@@ -811,6 +995,56 @@ fn logical_scale(state: &CurrentState, connector: &str) -> Option<f64> {
        .map(|l| l.2)
 }
 /// Every head Mutter reports, for [`crate::monitors::list`].
 ///
 /// A pure `GetCurrentState` read on its own short-lived connection + runtime — no session, no
 /// `ApplyMonitorsConfig`, so it never touches the topology and never contends [`TOPOLOGY_LOCK`].
 /// Geometry comes from the **logical** monitors (`state.2`), which is the coordinate space that
 /// matters (see `crate::monitors`); a monitor absent from every logical monitor is disabled, and is
 /// reported as such at the origin rather than dropped.
 pub(crate) fn list_monitors() -> Result<Vec<crate::monitors::PhysicalMonitor>> {
    let rt = tokio::runtime::Builder::new_current_thread()
        .enable_all()
        .build()
        .context("build tokio runtime (monitor enumeration)")?;
    let state = rt.block_on(async {
        let dc = display_config().await?;
        get_state(&dc).await
    })?;
    let mut out: Vec<_> = state
        .1
        .iter()
        .map(|(spec, _modes, _props)| {
            let (connector, vendor, product, _serial) = spec;
            // The logical monitor carrying this connector: its (x, y), scale and primary flag.
            let logical = state
                .2
                .iter()
                .find(|l| l.5.iter().any(|s| &s.0 == connector));
            let (w, h, refresh) = current_mode_full(&state, connector)
                .map(|(_id, w, h, hz)| (w.max(0) as u32, h.max(0) as u32, (hz * 1000.0) as u32))
                .unwrap_or((0, 0, 0));
            crate::monitors::PhysicalMonitor {
                connector: connector.clone(),
                description: crate::monitors::describe(vendor, product, connector),
                width: w,
                height: h,
                refresh_mhz: refresh,
                x: logical.map(|l| l.0).unwrap_or(0),
                y: logical.map(|l| l.1).unwrap_or(0),
                scale: logical.map(|l| l.2).filter(|s| *s > 0.0).unwrap_or(1.0),
                primary: logical.map(|l| l.4).unwrap_or(false),
                enabled: logical.is_some(),
                // Mutter names a `RecordVirtual` monitor indistinguishably from a physical one —
                // no prefix to key on, and the connector is minted per session. See the field doc.
                managed: false,
            }
        })
        .collect();
    out.sort_by_key(|m| (m.x, m.y, m.connector.clone()));
    Ok(out)
 }
 /// Read the virtual output's current scale and, when the user changed it (GNOME Settings
 /// mid-stream), persist it under the client's `scale_key` so the next connect reapplies it.
 /// Best-effort: read failures (teardown races, shell restart) are silently skipped.
@@ -111,25 +111,13 @@ impl VirtualDisplay for WlrootsDisplay {
        swaymsg(&["output", &name, "enable"])
            .with_context(|| format!("swaymsg output {name} enable"))?;
-        // Steer xdpw's headless output chooser at our new output, then run the portal
+        // Steer xdpw's headless output chooser at our new output, then run the portal handshake on
-        // handshake on its own thread (it parks to keep the cast alive, like the other backends).
+        // its own thread (it parks to keep the cast alive, like the other backends). Serialized:
-        ensure_xdpw_config()?;
+        // the chooser is one per-user file, so a concurrent session's write between ours and xdpw's
-        let chooser = chooser_file();
+        // read would silently capture the wrong output (see `SELECTION_LOCK`).
-        std::fs::write(&chooser, format!("Monitor: {name}\n"))
+        let (fd, node_id, stop) = {
-            .with_context(|| format!("write {chooser}"))?;
+            let _sel = SELECTION_LOCK.lock().unwrap_or_else(|e| e.into_inner());
-        let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<(OwnedFd, u32), String>>();
+            select_and_cast(&name, self.hw_cursor)?
        let stop = Arc::new(AtomicBool::new(false));
        let stop_thread = stop.clone();
        let hw_cursor = self.hw_cursor;
        thread::Builder::new()
            .name("punktfunk-wlr-vout".into())
            .spawn(move || portal_thread(setup_tx, stop_thread, hw_cursor))
            .context("spawn wlroots portal thread")?;
        let (fd, node_id) = match setup_rx.recv_timeout(Duration::from_secs(20)) {
            Ok(Ok(v)) => v,
            Ok(Err(e)) => bail!("ScreenCast portal on {name} failed: {e}"),
            Err(_) => bail!("timed out waiting for the ScreenCast portal on {name}"),
        };
        tracing::info!(
            node_id,
@@ -207,20 +195,29 @@ fn swaymsg(args: &[&str]) -> Result<String> {
    Ok(String::from_utf8_lossy(&out.stdout).into_owned())
 }
-/// Current output names from `swaymsg -t get_outputs` (JSON).
+/// Run a swaymsg **query** (`-t <kind> --raw`) and parse its JSON.
-fn output_names() -> Result<Vec<String>> {
+///
 /// ⚠️ Deliberately NOT [`swaymsg`]: that helper inserts `--` so its arguments are read as a sway
 /// *command*, which is right for `create_output` and wrong for a query — `-t` after `--` comes back
 /// as `Unknown/invalid command '-t'` (caught on-glass writing the monitor enumeration).
 fn swaymsg_query(kind: &str) -> Result<serde_json::Value> {
    let out = Command::new("swaymsg")
-        .args(["-t", "get_outputs", "--raw"])
+        .args(["-t", kind, "--raw"])
        .output()
        .context("run swaymsg (is sway installed?)")?;
    if !out.status.success() {
        bail!(
-            "swaymsg -t get_outputs failed: {}",
+            "swaymsg -t {kind} failed: {}",
            String::from_utf8_lossy(&out.stderr).trim()
        );
    }
    let raw = String::from_utf8_lossy(&out.stdout).into_owned();
-    let outputs: serde_json::Value = serde_json::from_str(&raw).context("parse get_outputs")?;
+    serde_json::from_str(&raw).with_context(|| format!("parse {kind}"))
 }
 /// Current output names from `swaymsg -t get_outputs` (JSON).
 fn output_names() -> Result<Vec<String>> {
    let outputs = swaymsg_query("get_outputs")?;
    Ok(outputs
        .as_array()
        .context("get_outputs: not an array")?
@@ -229,6 +226,114 @@ fn output_names() -> Result<Vec<String>> {
        .collect())
 }
 /// Serializes **write-the-chooser → complete-the-handshake**, process-wide.
 ///
 /// The chooser is a single per-user file: whoever writes last before xdpw reads wins. Two sessions
 /// starting at once (or a mirror starting beside a virtual output) would otherwise race, and the
 /// loser doesn't fail — it silently captures the *other* session's output. Held across the portal
 /// handshake, not just the write, because the read happens inside it.
 static SELECTION_LOCK: std::sync::Mutex<()> = std::sync::Mutex::new(());
 /// Point xdpw's chooser at `output` and run the ScreenCast handshake, returning the portal fd +
 /// node id and the guard that stops the cast. The caller must hold [`SELECTION_LOCK`].
 fn select_and_cast(output: &str, hw_cursor: bool) -> Result<(OwnedFd, u32, Arc<AtomicBool>)> {
    ensure_xdpw_config()?;
    let chooser = chooser_file();
    std::fs::write(&chooser, format!("Monitor: {output}\n"))
        .with_context(|| format!("write {chooser}"))?;
    let (setup_tx, setup_rx) = std::sync::mpsc::channel::<Result<(OwnedFd, u32), String>>();
    let stop = Arc::new(AtomicBool::new(false));
    let stop_thread = stop.clone();
    thread::Builder::new()
        .name("punktfunk-wlr-cast".into())
        .spawn(move || portal_thread(setup_tx, stop_thread, hw_cursor))
        .context("spawn wlroots portal thread")?;
    match setup_rx.recv_timeout(Duration::from_secs(20)) {
        Ok(Ok((fd, node_id))) => Ok((fd, node_id, stop)),
        Ok(Err(e)) => bail!("ScreenCast portal on {output} failed: {e}"),
        Err(_) => bail!("timed out waiting for the ScreenCast portal on {output}"),
    }
 }
 /// Record an **existing** sway output — the monitor-mirror path
 /// (`design/per-monitor-portal-capture.md` L3). Same chooser mechanism the virtual-output path
 /// uses, pointed at a physical connector instead of a headless one we created, so it inherits the
 /// "no GUI picker" property a background service needs.
 ///
 /// The keepalive stops the cast and nothing else: sway keeps the monitor, because we never made it.
 pub(crate) fn stream_existing_output(
    connector: &str,
    hw_cursor: bool,
 ) -> Result<crate::mirror::MirrorStream> {
    let _sel = SELECTION_LOCK.lock().unwrap_or_else(|e| e.into_inner());
    let (fd, node_id, stop) = select_and_cast(connector, hw_cursor)?;
    Ok(crate::mirror::MirrorStream {
        node_id,
        remote_fd: Some(fd),
        keepalive: Box::new(StopGuard(stop)),
    })
 }
 /// Every head sway reports, for [`crate::monitors::list`].
 ///
 /// `swaymsg -t get_outputs` reports `rect` in the logical coordinate space (post-scale,
 /// post-transform) — what `crate::monitors` documents. An inactive output has no `current_mode`, so
 /// its mode reads as zeros rather than a guess.
 pub(crate) fn list_monitors() -> Result<Vec<crate::monitors::PhysicalMonitor>> {
    let parsed = swaymsg_query("get_outputs")?;
    let mut out: Vec<_> = parsed
        .as_array()
        .context("get_outputs: not an array")?
        .iter()
        .filter_map(|o| {
            let connector = o.get("name")?.as_str()?.to_string();
            let rect = |k: &str| {
                o.get("rect")
                    .and_then(|r| r.get(k))
                    .and_then(|v| v.as_i64())
                    .unwrap_or(0)
            };
            let mode = |k: &str| {
                o.get("current_mode")
                    .and_then(|m| m.get(k))
                    .and_then(|v| v.as_i64())
                    .unwrap_or(0)
            };
            let str_field = |k: &str| o.get(k).and_then(|v| v.as_str()).unwrap_or("").trim();
            Some(crate::monitors::PhysicalMonitor {
                description: crate::monitors::describe(
                    str_field("make"),
                    str_field("model"),
                    &connector,
                ),
                width: mode("width").max(0) as u32,
                height: mode("height").max(0) as u32,
                // sway reports `refresh` in mHz already.
                refresh_mhz: mode("refresh").max(0) as u32,
                x: rect("x") as i32,
                y: rect("y") as i32,
                scale: o
                    .get("scale")
                    .and_then(|v| v.as_f64())
                    .filter(|s| *s > 0.0)
                    .unwrap_or(1.0),
                primary: o
                    .get("primary")
                    .and_then(|v| v.as_bool())
                    .or_else(|| o.get("focused").and_then(|v| v.as_bool()))
                    .unwrap_or(false),
                enabled: o.get("active").and_then(|v| v.as_bool()).unwrap_or(true),
                // Sway auto-names headless outputs `HEADLESS-N` and that is what `create` adds. A
                // sway started with its own headless output would match too — hence best-effort.
                managed: connector.starts_with("HEADLESS-"),
                connector,
            })
        })
        .collect();
    out.sort_by_key(|m| (m.x, m.y, m.connector.clone()));
    Ok(out)
 }
 /// Wait for the output `create_output` added (the name not in `before` — HEADLESS-N).
 fn wait_new_output(before: &[String], timeout: Duration) -> Result<String> {
    let deadline = Instant::now() + timeout;
@@ -0,0 +1,269 @@
 //! The monitor-mirror display backend: stream a **physical** head the compositor already has,
 //! instead of creating a virtual one. See `design/per-monitor-portal-capture.md`.
 //!
 //! It implements [`VirtualDisplay`] so it drops into the session machinery unchanged — but it
 //! creates nothing, and that difference is load-bearing:
 //!
 //! * [`DisplayOwnership::External`] ("someone else's display, merely mirrored: no keep-alive, no
 //!   topology, no reuse") is exactly the contract for a head we don't own, so the registry's
 //!   pooling/linger/exclusive machinery passes it through. §7.1 of the design doc — never disable,
 //!   re-position or "restore" a monitor the user is sitting in front of — holds *by construction*
 //!   here rather than by everyone remembering it.
 //! * `create()` ignores the requested [`Mode`]. A panel runs at the mode the user set; the client
 //!   scales. Reconfiguring someone's physical display to match a phone would be the same class of
 //!   rudeness as blanking it (§7.3).
 //!
 //! Selection is a **host-level pin** (`PUNKTFUNK_CAPTURE_MONITOR`), not a per-session choice —
 //! the host-pinned decision of record (§5.3), which is also what makes the input anchor below
 //! sound: one pin for the whole host, so the shared injector can't be re-aimed per session.
 use super::backend::{DisplayOwnership, VirtualDisplay, VirtualOutput};
 use super::monitors;
 use crate::{Compositor, Mode};
 use anyhow::{bail, Context, Result};
 /// What a backend hands back when it starts recording an existing head.
 ///
 /// `remote_fd` is the split: KWin and Mutter publish the node on the user's own PipeWire daemon
 /// (nothing to carry), while the portal-based backends (sway/xdpw, Hyprland/xdph) hand back a
 /// sandboxed remote fd that the capturer must connect through — the same distinction their
 /// *virtual*-output paths already make.
 pub(crate) struct MirrorStream {
    pub node_id: u32,
    pub remote_fd: Option<std::os::fd::OwnedFd>,
    /// Dropping this ends the recording. It never owns the monitor — we did not create it.
    pub keepalive: Box<dyn Send>,
 }
 /// Streams an existing monitor, named by connector.
 pub struct MirrorDisplay {
    compositor: Compositor,
    connector: String,
    hw_cursor: bool,
 }
 impl MirrorDisplay {
    pub fn new(compositor: Compositor, connector: String) -> Result<Self> {
        Ok(MirrorDisplay {
            compositor,
            connector,
            hw_cursor: false,
        })
    }
 }
 impl VirtualDisplay for MirrorDisplay {
    fn name(&self) -> &'static str {
        "mirror"
    }
    fn set_hw_cursor(&mut self, on: bool) {
        self.hw_cursor = on;
    }
    fn hw_cursor(&self) -> bool {
        self.hw_cursor
    }
    fn create(&mut self, _mode: Mode) -> Result<VirtualOutput> {
        // Resolve the pin against the live head list FIRST: it yields the geometry the input anchor
        // needs, and it turns "that monitor is gone" into one clear error before any compositor
        // call. `resolve` refuses to substitute a different head (see its doc).
        let monitors = monitors::list(self.compositor)
            .with_context(|| format!("enumerate monitors to mirror {:?}", self.connector))?;
        let target = monitors::resolve(&monitors, &self.connector)?;
        check_mirrorable(target, self.compositor)?;
        let origin = (target.x, target.y);
        let dims = (target.width, target.height, refresh_hz(target.refresh_mhz));
        let stream = match self.compositor {
            #[cfg(target_os = "linux")]
            Compositor::Kwin => {
                crate::kwin::stream_existing_output(&target.connector, self.hw_cursor)?
            }
            #[cfg(target_os = "linux")]
            Compositor::Mutter => {
                crate::mutter::stream_existing_output(&target.connector, self.hw_cursor)?
            }
            #[cfg(target_os = "linux")]
            Compositor::Wlroots => {
                crate::wlroots::stream_existing_output(&target.connector, self.hw_cursor)?
            }
            #[cfg(target_os = "linux")]
            Compositor::Hyprland => {
                crate::hyprland::stream_existing_output(&target.connector, self.hw_cursor)?
            }
            // gamescope is nested — it has no physical heads of its own, and `monitors::list`
            // already returned an empty set, so `resolve` failed before we got here. This arm
            // exists for exhaustiveness, not as a reachable path.
            other => bail!(
                "mirroring an existing monitor is not supported on the {} backend",
                other.id()
            ),
        };
        // NOTE: aiming absolute input at this head is the HOST's job, not ours — this crate must
        // not depend on pf-inject (see the crate doc: "never on capture/inject"). The host sets the
        // anchor from the same pin at startup; §7.2 of the design doc explains why it is host-level
        // rather than set here per session.
        tracing::info!(
            connector = %target.connector,
            mode = %target.mode_label(),
            at = %format!("+{}+{}", origin.0, origin.1),
            node_id = stream.node_id,
            "mirroring an existing monitor (no virtual display created)"
        );
        // The keepalive IS the recording: dropping it stops the cast and leaves the monitor exactly
        // as it was (we created nothing, so there is nothing to restore).
        let mut out = VirtualOutput::owned(stream.node_id, Some(dims), stream.keepalive);
        // Portal-based backends (sway/xdpw, Hyprland/xdph) publish on a sandboxed remote the
        // capturer must connect through; KWin/Mutter use the user's own daemon.
        out.remote_fd = stream.remote_fd;
        // Never pooled, never lingered, never made primary/exclusive: we don't own this head.
        out.ownership = DisplayOwnership::External;
        Ok(out)
    }
 }
 /// Can this head be mirrored at all? Each rejection is something a compositor would otherwise
 /// answer with silence or a black stream, so it is caught here where the reason can be stated.
 fn check_mirrorable(target: &monitors::PhysicalMonitor, compositor: Compositor) -> Result<()> {
    if !target.enabled {
        bail!(
            "monitor {:?} is disabled — enable it before streaming it",
            target.connector
        );
    }
    if target.managed {
        // `managed` is only *conclusive* where the name is ours by construction: KWin's
        // `Virtual-punktfunk` prefix, Hyprland's `PF-N`. Sway names EVERY headless output
        // `HEADLESS-N` — its own included — so refusing there would block a legitimate setup
        // (a headless sway box whose outputs are all HEADLESS-N is exactly the remote case this
        // feature serves). Warn and continue; a user who really did pin our own virtual display
        // sees a mirror of it and the log says why.
        if names_ours_conclusively(compositor) {
            bail!(
                "monitor {:?} is one of punktfunk's own virtual displays, not a physical head — \
                 clear the streamed-screen setting to use the normal virtual-display path",
                target.connector
            );
        }
        tracing::warn!(
            connector = %target.connector,
            "the pinned monitor looks like a headless output — on this compositor that name is \
             ambiguous (it may be one of punktfunk's own virtual displays), mirroring it anyway"
        );
    }
    if target.width == 0 || target.height == 0 {
        bail!(
            "monitor {:?} reports no current mode ({}x{}) — it is not driving a signal",
            target.connector,
            target.width,
            target.height
        );
    }
    Ok(())
 }
 /// Does this compositor's `managed` flag mean "ours, for certain"? KWin outputs carry the
 /// `Virtual-punktfunk` prefix we chose, and Hyprland's are `PF-N` — both ours by construction.
 /// Sway's `HEADLESS-N` is sway's own generic naming, so it is a hint, not proof.
 fn names_ours_conclusively(compositor: Compositor) -> bool {
    matches!(compositor, Compositor::Kwin | Compositor::Hyprland)
 }
 /// mHz → whole Hz for [`VirtualOutput::preferred_mode`], never 0 (the negotiation treats 0 as
 /// "unset", and a head that didn't report a refresh is still running at *some* rate — 60 is the
 /// same assumption KWin's own virtual outputs are born with).
 fn refresh_hz(mhz: u32) -> u32 {
    let hz = (mhz as f64 / 1000.0).round() as u32;
    if hz == 0 {
        60
    } else {
        hz
    }
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    fn head(connector: &str) -> monitors::PhysicalMonitor {
        monitors::PhysicalMonitor {
            connector: connector.into(),
            description: "ACME 27".into(),
            width: 2560,
            height: 1440,
            refresh_mhz: 144_000,
            x: 1920,
            y: 0,
            scale: 1.0,
            primary: false,
            enabled: true,
            managed: false,
        }
    }
    #[test]
    fn a_real_enabled_head_is_mirrorable() {
        assert!(check_mirrorable(&head("DP-2"), Compositor::Kwin).is_ok());
    }
    /// Streaming a dark head would be a black rectangle with no explanation — say why instead.
    #[test]
    fn a_disabled_head_is_refused_with_the_reason() {
        let mut m = head("DP-2");
        m.enabled = false;
        let err = check_mirrorable(&m, Compositor::Kwin)
            .unwrap_err()
            .to_string();
        assert!(err.contains("disabled"), "{err}");
    }
    /// Mirroring our OWN virtual display is a loop with extra steps; catch the misconfiguration
    /// rather than streaming something confusing.
    #[test]
    fn one_of_our_own_virtual_displays_is_refused() {
        let mut m = head("Virtual-punktfunk-1");
        m.managed = true;
        let err = check_mirrorable(&m, Compositor::Kwin)
            .unwrap_err()
            .to_string();
        assert!(err.contains("virtual displays"), "{err}");
    }
    /// Sway names every headless output `HEADLESS-N`, its own included, so the `managed` hint is
    /// NOT proof there — refusing would block a headless sway box, which is exactly the remote
    /// setup this feature serves. (Found on-glass: a two-output headless sway had both heads
    /// flagged, and the KWin-strength rule would have refused to mirror either.)
    #[test]
    fn a_headless_sway_output_is_mirrored_despite_the_ambiguous_name() {
        let mut m = head("HEADLESS-2");
        m.managed = true;
        assert!(check_mirrorable(&m, Compositor::Wlroots).is_ok());
        // Hyprland's `PF-N` IS our naming, so it stays conclusive.
        assert!(check_mirrorable(&m, Compositor::Hyprland).is_err());
    }
    /// A head listed but not driving a mode (enabled yet modeless) would negotiate a 0x0 stream.
    #[test]
    fn a_head_with_no_current_mode_is_refused() {
        let mut m = head("DP-2");
        m.width = 0;
        m.height = 0;
        let err = check_mirrorable(&m, Compositor::Kwin)
            .unwrap_err()
            .to_string();
        assert!(err.contains("no current mode"), "{err}");
    }
    #[test]
    fn refresh_rounds_and_never_reports_zero() {
        assert_eq!(refresh_hz(60000), 60);
        assert_eq!(refresh_hz(59940), 60);
        assert_eq!(refresh_hz(119_920), 120);
        // An unreported refresh must not become a 0 Hz preferred mode.
        assert_eq!(refresh_hz(0), 60);
    }
 }
@@ -0,0 +1,208 @@
 //! Physical-monitor enumeration — "what heads does this host actually have?".
 //!
 //! This is the read-only counterpart to the rest of this crate: everything else here *creates* and
 //! owns virtual outputs, while this module only *reports* the heads the compositor already has, so
 //! an operator can pin capture at one of them (`PUNKTFUNK_CAPTURE_MONITOR`) and the console can
 //! render a picker. See `design/per-monitor-portal-capture.md` §5.1.
 //!
 //! It lives in pf-vdisplay because monitor enumeration is a **per-compositor** question and this
 //! crate already speaks every one of those dialects — KWin's `kde_output_device_v2`, Mutter's
 //! `DisplayConfig.GetCurrentState`, `swaymsg -t get_outputs`, `hyprctl -j monitors`. Each backend's
 //! implementation sits beside the code that already talks to it; this module is the shared type and
 //! the dispatch.
 //!
 //! **The geometry is the point.** `x`/`y` are what make a head *identifiable*: two monitors can
 //! share a size (and then a size-keyed match is a coin flip — see `pf-inject`'s absolute-coordinate
 //! region selection), but they can never share an origin in the compositor's global space.
 use crate::Compositor;
 use anyhow::{bail, Result};
 /// One head as the compositor currently reports it. Logical (post-scale) geometry throughout —
 /// the same coordinate space libei regions and compositor layout use, *not* pixels.
 #[derive(Clone, Debug, PartialEq)]
 pub struct PhysicalMonitor {
    /// Connector name — `DP-1`, `HDMI-A-2`, `eDP-1`. The id `PUNKTFUNK_CAPTURE_MONITOR` names.
    pub connector: String,
    /// Human label for a picker (`make model`, else the connector). Never used for matching.
    pub description: String,
    /// Current mode, in pixels.
    pub width: u32,
    pub height: u32,
    /// Refresh in mHz (60000 = 60 Hz). 0 when the backend doesn't report it.
    pub refresh_mhz: u32,
    /// Top-left in the compositor's global logical space — the identity key (see the module doc).
    pub x: i32,
    pub y: i32,
    /// Logical scale factor (1.0 when unreported).
    pub scale: f64,
    /// The compositor's primary/focused head, when it says.
    pub primary: bool,
    /// Enabled (driven). A disabled head is still listed, so "why can't I pick it?" has an answer.
    pub enabled: bool,
    /// **Best-effort**: this output is one WE created (a managed virtual display), not a real head.
    /// Only KWin can say so reliably (managed outputs carry a name prefix); the other backends
    /// name virtual outputs indistinguishably from physical ones, so this stays `false` there
    /// rather than guessing. Callers use it to grey out nonsense choices, never to filter blindly.
    pub managed: bool,
 }
 /// Build the picker label from a compositor's make/model, falling back to the connector.
 ///
 /// Compositors fill unknown fields with the literal string `"Unknown"` rather than leaving them
 /// empty (seen on-glass: sway reports `"Unknown Unknown"` for a headless output), so treat that as
 /// absent too — a picker row reading "Unknown Unknown" is worse than one reading "DP-1".
 pub(crate) fn describe(make: &str, model: &str, connector: &str) -> String {
    let known = |s: &str| {
        let s = s.trim();
        !s.is_empty() && !s.eq_ignore_ascii_case("unknown")
    };
    let label = [make, model]
        .iter()
        .map(|s| s.trim())
        .filter(|s| known(s))
        .collect::<Vec<_>>()
        .join(" ");
    if label.is_empty() {
        connector.to_string()
    } else {
        label
    }
 }
 impl PhysicalMonitor {
    /// `1920x1080@60` — for logs and pickers.
    pub fn mode_label(&self) -> String {
        if self.refresh_mhz == 0 {
            format!("{}x{}", self.width, self.height)
        } else {
            format!(
                "{}x{}@{}",
                self.width,
                self.height,
                (self.refresh_mhz as f64 / 1000.0).round() as u32
            )
        }
    }
 }
 /// Every head `compositor` reports, in the compositor's own order.
 ///
 /// Errors when the backend can't be reached (compositor not running, IPC unavailable) — that is
 /// deliberately distinct from `Ok(vec![])`, which means "reached it, it has no heads" (a headless
 /// session). Callers that only want to *offer* a picker can treat both as "nothing to show";
 /// callers resolving a pinned monitor must not (see [`resolve`]).
 pub fn list(compositor: Compositor) -> Result<Vec<PhysicalMonitor>> {
    match compositor {
        #[cfg(target_os = "linux")]
        Compositor::Kwin => crate::kwin_output_mgmt::list_monitors(),
        #[cfg(target_os = "linux")]
        Compositor::Mutter => crate::mutter::list_monitors(),
        #[cfg(target_os = "linux")]
        Compositor::Wlroots => crate::wlroots::list_monitors(),
        #[cfg(target_os = "linux")]
        Compositor::Hyprland => crate::hyprland::list_monitors(),
        // gamescope is nested: it has no physical heads of its own, and mirroring the desktop it
        // runs on is a question for the compositor UNDER it. Not an error — just nothing to offer.
        #[cfg(target_os = "linux")]
        Compositor::Gamescope => Ok(Vec::new()),
        #[cfg(not(target_os = "linux"))]
        _ => bail!("physical-monitor enumeration is implemented for the Linux backends only"),
    }
 }
 /// Resolve a configured monitor name against `monitors`, exactly then case-insensitively.
 ///
 /// **A miss is a hard error carrying the available names**, never a silent fall-back to some other
 /// head: an operator who pinned `DP-2` and gets `DP-1` streamed has been shown the wrong screen,
 /// which is worse than a host that refuses to start a session and says why
 /// (`design/per-monitor-portal-capture.md` §5.2).
 pub fn resolve<'a>(monitors: &'a [PhysicalMonitor], want: &str) -> Result<&'a PhysicalMonitor> {
    if let Some(m) = monitors.iter().find(|m| m.connector == want) {
        return Ok(m);
    }
    if let Some(m) = monitors
        .iter()
        .find(|m| m.connector.eq_ignore_ascii_case(want))
    {
        return Ok(m);
    }
    let available = monitors
        .iter()
        .map(|m| m.connector.as_str())
        .collect::<Vec<_>>()
        .join(", ");
    if available.is_empty() {
        bail!("no monitor named {want:?} — this compositor reports no monitors at all");
    }
    bail!("no monitor named {want:?} — this host has: {available}");
 }
 #[cfg(test)]
 mod tests {
    use super::*;
    fn mon(connector: &str) -> PhysicalMonitor {
        PhysicalMonitor {
            connector: connector.into(),
            description: String::new(),
            width: 1920,
            height: 1080,
            refresh_mhz: 60000,
            x: 0,
            y: 0,
            scale: 1.0,
            primary: false,
            enabled: true,
            managed: false,
        }
    }
    #[test]
    fn resolve_matches_exactly_then_case_insensitively() {
        let ms = [mon("DP-1"), mon("HDMI-A-2")];
        assert_eq!(resolve(&ms, "DP-1").unwrap().connector, "DP-1");
        assert_eq!(resolve(&ms, "hdmi-a-2").unwrap().connector, "HDMI-A-2");
    }
    #[test]
    fn resolve_prefers_the_exact_match_over_a_case_fold() {
        // Connector names are case-sensitive to the compositor; if both spellings exist, the
        // exact one wins rather than whichever the fold happened to reach first.
        let ms = [mon("dp-1"), mon("DP-1")];
        assert_eq!(resolve(&ms, "DP-1").unwrap().connector, "DP-1");
    }
    #[test]
    fn a_miss_lists_what_is_available() {
        let ms = [mon("DP-1"), mon("HDMI-A-2")];
        let err = resolve(&ms, "DP-9").unwrap_err().to_string();
        assert!(err.contains("DP-1") && err.contains("HDMI-A-2"), "{err}");
    }
    #[test]
    fn a_miss_with_no_monitors_says_so() {
        let err = resolve(&[], "DP-1").unwrap_err().to_string();
        assert!(err.contains("no monitors at all"), "{err}");
    }
    /// Compositors write the literal "Unknown" instead of leaving make/model empty (sway does it
    /// for headless outputs), so a picker must not end up showing "Unknown Unknown".
    #[test]
    fn describe_falls_back_to_the_connector_for_empty_or_unknown_fields() {
        assert_eq!(describe("ACME", "U2720Q", "DP-1"), "ACME U2720Q");
        assert_eq!(describe("Unknown", "Unknown", "HEADLESS-1"), "HEADLESS-1");
        assert_eq!(describe("", "", "DP-1"), "DP-1");
        // A half-known pair keeps the half that means something.
        assert_eq!(describe("Unknown", "U2720Q", "DP-1"), "U2720Q");
        assert_eq!(describe("  ", "unknown", "DP-2"), "DP-2");
    }
    #[test]
    fn mode_label_drops_an_unknown_refresh() {
        let mut m = mon("DP-1");
        assert_eq!(m.mode_label(), "1920x1080@60");
        m.refresh_mhz = 0;
        assert_eq!(m.mode_label(), "1920x1080");
    }
 }
@@ -246,6 +246,16 @@ pub struct DisplayPolicy {
    /// startup. Orthogonal to `preset` (like `game_session`); `#[serde(default)]` = off.
    #[serde(default)]
    pub pnp_disable_monitors: bool,
    /// **Mirror a physical monitor instead of creating a virtual display**: the connector name
    /// (`DP-1`, `HDMI-A-2`) sessions should stream, or `None` for the normal virtual-display path.
    ///
    /// Orthogonal to `preset`/lifecycle (like `game_session`): a preset change never clears it, and
    /// `#[serde(default)]` leaves existing `display-settings.json` files untouched. It is a
    /// **host-wide** setting, not per-client — the host-pinned decision of record in
    /// `design/per-monitor-portal-capture.md` §5.3. `PUNKTFUNK_CAPTURE_MONITOR` overrides it (see
    /// [`capture_monitor`]), so an appliance can pin in `host.env` without the console fighting it.
    #[serde(default)]
    pub capture_monitor: Option<String>,
 }
 fn one() -> u32 {
@@ -271,6 +281,7 @@ impl Default for DisplayPolicy {
            game_session: GameSession::default(),
            ddc_power_off: false,
            pnp_disable_monitors: false,
            capture_monitor: None,
        }
    }
 }
@@ -316,6 +327,12 @@ impl DisplayPolicy {
    pub fn sanitized(mut self) -> Self {
        self.version = 1;
        self.max_displays = self.max_displays.clamp(1, 16);
        // A picker that clears its selection sends `""`; that means "no pin", not "match the
        // monitor named empty string" — same normalization the env knob does.
        self.capture_monitor = self
            .capture_monitor
            .map(|s| s.trim().to_string())
            .filter(|s| !s.is_empty());
        self
    }
 }
@@ -332,6 +349,7 @@ impl EffectivePolicy {
        game_session: GameSession,
        ddc_power_off: bool,
        pnp_disable_monitors: bool,
        capture_monitor: Option<String>,
    ) -> DisplayPolicy {
        DisplayPolicy {
            version: 1,
@@ -345,10 +363,13 @@ impl EffectivePolicy {
                positions,
            },
            max_displays: self.max_displays,
-            // Preserve the orthogonal axes (EffectivePolicy doesn't carry them).
+            // Preserve the orthogonal axes (EffectivePolicy doesn't carry them). Dropping any of
            // them here would mean "saving a display arrangement silently cleared my setting" —
            // for `capture_monitor` that would swap the streamed screen out from under the operator.
            game_session,
            ddc_power_off,
            pnp_disable_monitors,
            capture_monitor,
        }
    }
 }
@@ -791,12 +812,19 @@ mod tests {
        let mut positions = BTreeMap::new();
        positions.insert("1".to_string(), Position { x: 0, y: 0 });
        positions.insert("7".to_string(), Position { x: 2560, y: 0 });
-        let p = eff.with_manual_layout(positions, GameSession::Dedicated, true, true);
+        let p = eff.with_manual_layout(
-        // The orthogonal axes (game-session, DDC power-off, PnP disable) are preserved through
+            positions,
-        // the transform.
+            GameSession::Dedicated,
            true,
            true,
            Some("DP-2".into()),
        );
        // The orthogonal axes (game-session, DDC power-off, PnP disable, capture-monitor pin) are
        // preserved through the transform — arranging displays must not clear an unrelated setting.
        assert_eq!(p.game_session, GameSession::Dedicated);
        assert!(p.ddc_power_off);
        assert!(p.pnp_disable_monitors);
        assert_eq!(p.capture_monitor.as_deref(), Some("DP-2"));
        // Preset drops to Custom so the explicit fields (incl. the layout) rule…
        assert_eq!(p.preset, Preset::Custom);
        // …every other behavior axis is preserved verbatim…
@@ -163,8 +163,15 @@ pub struct SessionEnv {
    /// `HYPRLAND_INSTANCE_SIGNATURE` of the live Hyprland instance (`Some` only for
    /// [`ActiveKind::DesktopHyprland`]). `hyprctl` needs it to reach the right instance socket;
    /// [`apply_session_env`] exports it so the systemd-`--user` host works without inheriting the
-    /// session env (unlike sway's `SWAYSOCK`). `None` for every other compositor.
+    /// session env. `None` for every other compositor.
    pub hyprland_signature: Option<String>,
    /// `SWAYSOCK` of the live sway instance (`Some` only for a sway [`ActiveKind::DesktopWlroots`]).
    /// `swaymsg` needs it, and it was the LAST session variable the host could not derive: a
    /// `systemd --user` host that never inherited the login shell's environment had no sway IPC at
    /// all, so output enumeration and the chooser both failed. Derived from the detected compositor
    /// PID like the Hyprland signature above. `None` on river (wlroots, but no sway IPC) and every
    /// other compositor.
    pub sway_socket: Option<String>,
 }
 /// The live session: its [`ActiveKind`] plus the [`SessionEnv`] to target it.
@@ -316,6 +323,12 @@ pub fn detect_active_session() -> ActiveSession {
        ActiveKind::DesktopHyprland => find_hypr_signature(&xdg_runtime_dir, uid),
        _ => None,
    };
    // Same idea for sway's IPC socket: without it `swaymsg` has nothing to talk to, and a
    // `systemd --user` host never inherited it.
    let sway_socket = match kind {
        ActiveKind::DesktopWlroots => find_sway_socket(&xdg_runtime_dir, uid, winning_pid),
        _ => None,
    };
    ActiveSession {
        kind,
        env: SessionEnv {
@@ -324,6 +337,7 @@ pub fn detect_active_session() -> ActiveSession {
            dbus_session_bus_address: dbus,
            xdg_current_desktop,
            hyprland_signature,
            sway_socket,
        },
        compositor_pid: winning_pid,
    }
@@ -361,6 +375,46 @@ fn find_hypr_signature(runtime: &str, uid: u32) -> Option<String> {
    cands.into_iter().next().map(|(_, n)| n)
 }
 /// Find the live sway IPC socket (`SWAYSOCK`) for our uid. Trust a valid inherited value first (the
 /// host launched inside the session); then the exact `sway-ipc.<uid>.<pid>.sock` for the compositor
 /// PID detection already picked — a name sway builds from those two numbers, so it is an identity
 /// match rather than a guess; then the newest-mtime `sway-ipc.<uid>.*.sock` we own, for the case
 /// where the socket name does not match the PID we saw (sway re-exec, a wrapper process).
 ///
 /// `None` on river: it is the other [`ActiveKind::DesktopWlroots`] compositor and has no sway IPC —
 /// which is the honest answer, since the wlroots backend drives sway through `swaymsg`.
 #[cfg(target_os = "linux")]
 fn find_sway_socket(runtime: &str, uid: u32, pid: Option<u32>) -> Option<String> {
    use std::os::unix::fs::MetadataExt;
    if let Ok(s) = std::env::var("SWAYSOCK") {
        if !s.is_empty() && std::path::Path::new(&s).exists() {
            return Some(s);
        }
    }
    if let Some(pid) = pid {
        let exact = std::path::Path::new(runtime).join(format!("sway-ipc.{uid}.{pid}.sock"));
        if exact.exists() {
            return Some(exact.to_string_lossy().into_owned());
        }
    }
    let prefix = format!("sway-ipc.{uid}.");
    let mut cands: Vec<(std::time::SystemTime, String)> = Vec::new();
    for e in std::fs::read_dir(runtime).ok()?.flatten() {
        let name = e.file_name().to_string_lossy().into_owned();
        if !name.starts_with(&prefix) || !name.ends_with(".sock") {
            continue;
        }
        let Ok(md) = e.metadata() else { continue };
        if md.uid() != uid {
            continue;
        }
        let mtime = md.modified().unwrap_or(std::time::UNIX_EPOCH);
        cands.push((mtime, e.path().to_string_lossy().into_owned()));
    }
    cands.sort_by_key(|(m, _)| std::cmp::Reverse(*m));
    cands.into_iter().next().map(|(_, p)| p)
 }
 #[cfg(not(target_os = "linux"))]
 pub fn detect_active_session() -> ActiveSession {
    ActiveSession::none()
@@ -426,6 +480,15 @@ pub fn apply_session_env(active: &ActiveSession) {
        Some(sig) => std::env::set_var("HYPRLAND_INSTANCE_SIGNATURE", sig),
        None => std::env::remove_var("HYPRLAND_INSTANCE_SIGNATURE"),
    }
    // sway: same treatment, and for the same reason — `swaymsg` (output enumeration, the capture
    // chooser) is unreachable without it, so a systemd `--user` host that never inherited the login
    // environment had no sway backend at all. Cleared when nothing sway-shaped is live, so a
    // sway→Hyprland switch can't leave `swaymsg` aimed at a dead socket. `wlroots::is_available()`
    // keys off this variable, so setting it here is also what makes the backend visible at all.
    match &e.sway_socket {
        Some(sock) => std::env::set_var("SWAYSOCK", sock),
        None => std::env::remove_var("SWAYSOCK"),
    }
    // NOTHING live ⇒ every session-scoped var still in the env is a leftover from a previous
    // connect's retarget, and the availability probes read them: after a gnome-shell crash
    // (observed 2026-07-10: SIGSEGV → GDM greeter) a stale `XDG_CURRENT_DESKTOP=GNOME` kept
@@ -564,3 +627,98 @@ pub fn settle_desktop_portal(chosen: Compositor) {
 #[cfg(not(target_os = "linux"))]
 pub fn settle_desktop_portal(_chosen: Compositor) {}
 #[cfg(all(test, target_os = "linux"))]
 mod tests {
    use super::*;
    /// A scratch runtime dir with the sway-ipc sockets named in `pids`, plus the uid the names are
    /// built from. Removed on drop.
    struct FakeRuntime {
        dir: std::path::PathBuf,
        uid: u32,
    }
    impl FakeRuntime {
        fn new(tag: &str, pids: &[u32]) -> FakeRuntime {
            // SAFETY: parameterless POSIX call, returns the calling process's uid; touches no memory.
            let uid = unsafe { libc::getuid() };
            let dir =
                std::env::temp_dir().join(format!("pf-swaysock-{tag}-{}", std::process::id()));
            let _ = std::fs::remove_dir_all(&dir);
            std::fs::create_dir_all(&dir).unwrap();
            for pid in pids {
                std::fs::write(dir.join(format!("sway-ipc.{uid}.{pid}.sock")), b"").unwrap();
            }
            FakeRuntime { dir, uid }
        }
        fn path(&self) -> &str {
            self.dir.to_str().unwrap()
        }
    }
    impl Drop for FakeRuntime {
        fn drop(&mut self) {
            let _ = std::fs::remove_dir_all(&self.dir);
        }
    }
    /// Run `f` with `SWAYSOCK` unset, so the "trust what we inherited" rung can't decide the test.
    /// Serialized on the crate's env lock — these tests mutate process-global state.
    fn without_inherited_swaysock<R>(f: impl FnOnce() -> R) -> R {
        crate::with_env_lock(|| {
            let prev = std::env::var_os("SWAYSOCK");
            std::env::remove_var("SWAYSOCK");
            let out = f();
            if let Some(p) = prev {
                std::env::set_var("SWAYSOCK", p);
            }
            out
        })
    }
    /// The point of deriving it: the socket that belongs to the compositor detection actually found,
    /// not merely *a* sway socket. A stale socket from a previous sway (crash, re-login) sitting in
    /// the same runtime dir must not win.
    #[test]
    fn the_socket_matching_the_detected_pid_wins() {
        let rt = FakeRuntime::new("exact", &[4242, 9999]);
        let got = without_inherited_swaysock(|| find_sway_socket(rt.path(), rt.uid, Some(4242)));
        assert_eq!(
            got,
            Some(format!("{}/sway-ipc.{}.4242.sock", rt.path(), rt.uid))
        );
    }
    /// sway re-exec (or a wrapper) can leave the socket named for a PID we didn't see. One socket in
    /// the dir is still unambiguous — better to hand `swaymsg` the real thing than nothing.
    #[test]
    fn an_unmatched_pid_falls_back_to_the_socket_that_is_there() {
        let rt = FakeRuntime::new("fallback", &[777]);
        let got = without_inherited_swaysock(|| find_sway_socket(rt.path(), rt.uid, Some(12345)));
        assert_eq!(
            got,
            Some(format!("{}/sway-ipc.{}.777.sock", rt.path(), rt.uid))
        );
    }
    /// river is the other wlroots desktop and ships no sway IPC. Reporting `None` is what keeps
    /// `apply_session_env` from exporting a `SWAYSOCK` that points at nothing — an exported lie
    /// would make `wlroots::is_available()` claim a backend that cannot answer.
    #[test]
    fn no_sway_ipc_socket_reports_none() {
        let rt = FakeRuntime::new("none", &[]);
        let got = without_inherited_swaysock(|| find_sway_socket(rt.path(), rt.uid, Some(1)));
        assert_eq!(got, None);
    }
    /// Someone else's socket in a shared runtime dir is not ours to talk to.
    #[test]
    fn another_uids_socket_is_ignored() {
        let rt = FakeRuntime::new("otheruid", &[]);
        let other = rt.uid.wrapping_add(1);
        std::fs::write(rt.dir.join(format!("sway-ipc.{other}.500.sock")), b"").unwrap();
        let got = without_inherited_swaysock(|| find_sway_socket(rt.path(), rt.uid, Some(500)));
        assert_eq!(got, None);
    }
 }
@@ -475,3 +475,255 @@ pub fn dualsense_windows_test(args: &[String]) -> Result<()> {
    println!("dualsense-windows-test: done (devnode removed)");
    Ok(())
 }
 /// Mirror a physical monitor and pull frames from it — the on-glass gate for per-monitor capture
 /// (`design/per-monitor-portal-capture.md` P2/P3), without needing a client to connect.
 ///
 /// Opens the display backend exactly as a session would (so a `PUNKTFUNK_CAPTURE_MONITOR` pin
 /// routes to the mirror backend), attaches a capturer to whatever PipeWire node comes back, and
 /// reports the frames it actually receives. What it proves that a unit test cannot: the compositor
 /// accepted the record request for a NAMED head, and that head is producing pixels at its own size.
 ///
 /// `--monitor <CONNECTOR>` pins for this run (else `PUNKTFUNK_CAPTURE_MONITOR`); `--seconds N`.
 #[cfg(target_os = "linux")]
 pub fn mirror_test(args: &[String]) -> Result<()> {
    use std::time::{Duration, Instant};
    let arg = |name: &str| {
        args.iter()
            .skip_while(|a| a.as_str() != name)
            .nth(1)
            .cloned()
    };
    let secs: u64 = arg("--seconds").and_then(|s| s.parse().ok()).unwrap_or(5);
    // `--monitor` cannot work by setting PUNKTFUNK_CAPTURE_MONITOR here: pf_host_config parses the
    // environment ONCE and startup already read it, so this process would still see the old
    // snapshot. An explicit connector therefore goes through `open_mirror` below; only the unset
    // case falls back to the pin (and to `open`, which is the production routing).
    let explicit = arg("--monitor");
    let want = explicit
        .clone()
        .or_else(crate::vdisplay::capture_monitor)
        .context(
            "no monitor named — pass --monitor <CONNECTOR> or set PUNKTFUNK_CAPTURE_MONITOR",
        )?;
    let compositor = crate::vdisplay::detect()?;
    let monitors = crate::vdisplay::monitors::list(compositor)?;
    let target = crate::vdisplay::monitors::resolve(&monitors, &want)?;
    println!(
        "mirror-test: {compositor:?} {} ({}) at +{},+{}",
        target.connector,
        target.mode_label(),
        target.x,
        target.y
    );
    // No `--monitor` ⇒ exercise the PRODUCTION routing (`open` consulting the pin), which is the
    // more valuable path to prove; an explicit connector takes the direct opener.
    let mut vd = match &explicit {
        Some(connector) => crate::vdisplay::open_mirror(compositor, connector)?,
        None => crate::vdisplay::open(compositor)?,
    };
    // The mode is ignored by the mirror backend (a panel runs at the mode its owner set); pass the
    // head's own so this also behaves if the pin is ever unset mid-test.
    let mode = crate::vdisplay::Mode {
        width: target.width,
        height: target.height,
        refresh_hz: 60,
    };
    let vout = vd.create(mode).context("open the mirror display")?;
    println!(
        "mirror-test: node_id={} preferred={:?} ownership={:?}",
        vout.node_id, vout.preferred_mode, vout.ownership
    );
    // Default to the GPU (dmabuf zero-copy) path a real session uses; `--cpu` forces the mmap
    // path, which is worth having as a switch — the two negotiate different PipeWire buffer types.
    let gpu = !args.iter().any(|a| a == "--cpu");
    let fmt = pf_frame::OutputFormat::resolve(false, gpu);
    println!(
        "mirror-test: capture path = {}",
        if gpu { "gpu/dmabuf" } else { "cpu/mmap" }
    );
    let mut cap = crate::capture::capture_virtual_output(
        vout,
        fmt,
        crate::session_plan::CaptureBackend::resolve(),
    )
    .context("attach a capturer to the mirrored monitor")?;
    cap.set_active(true);
    let deadline = Instant::now() + Duration::from_secs(secs);
    let (mut frames, mut first) = (0u32, None);
    let mut idle = 0u32;
    let mut dims = (0u32, 0u32);
    while Instant::now() < deadline {
        match cap.next_frame_within(Duration::from_secs(5)) {
            Ok(f) => {
                if first.is_none() {
                    first = Some(Instant::now());
                    println!(
                        "mirror-test: FIRST FRAME {}x{} {:?}",
                        f.width, f.height, f.format
                    );
                }
                dims = (f.width, f.height);
                frames += 1;
            }
            // A timeout is NOT fatal here: compositor screencast is damage-driven, so a static
            // desktop legitimately produces nothing for seconds at a time (the host's own capture
            // diag logs `new_fps=0` for virtual outputs on an idle desktop for the same reason).
            // Keep waiting until the deadline instead of ending the measurement on the first gap.
            Err(e) => {
                idle += 1;
                if idle == 1 {
                    println!("mirror-test: (idle — no damage yet: {e:#})");
                }
            }
        }
    }
    match first {
        Some(_) => println!(
            "mirror-test: OK — {frames} frames in {secs}s at {}x{} ({:.1} fps over the whole run, \
             {idle} idle gaps). Compositor capture is damage-driven: a static desktop produces \
             nothing, so judge this by whether frames track what is happening on screen.",
            dims.0,
            dims.1,
            frames as f64 / secs as f64
        ),
        None => {
            anyhow::bail!("no frames arrived in {secs}s — the cast started but produced nothing")
        }
    }
    Ok(())
 }
 /// Aim absolute input at a named monitor and prove where it landed — the on-glass gate for the
 /// input-region ladder (`design/per-monitor-portal-capture.md` §7.2), without needing a client.
 ///
 /// The ladder exists for one case a unit test can only simulate: **two heads of the same size**,
 /// where matching a libei region by the streamed mode is a coin flip and the pointer silently ends
 /// up on the wrong screen. This drives the real thing — the compositor's own EIS regions, the real
 /// anchor, the real resolver — and prints the region absolute coordinates actually mapped into, so
 /// "it went to the right monitor" is something you read rather than infer.
 ///
 /// `--monitor <CONNECTOR>` anchors at that head's origin (default: the `PUNKTFUNK_CAPTURE_MONITOR` /
 /// policy pin); `--none` deliberately runs UNANCHORED, which is the A/B that makes the anchored run
 /// mean something on a same-size pair. It then walks the corners and centre of a `--width`×`--height`
 /// client surface so an observer can watch the pointer.
 ///
 /// Read the answer from the log line `libei: absolute input maps into this output`.
 #[cfg(target_os = "linux")]
 pub fn anchor_test(args: &[String]) -> Result<()> {
    use punktfunk_core::input::{InputEvent, InputKind};
    use std::time::Duration;
    let arg = |name: &str| {
        args.iter()
            .skip_while(|a| a.as_str() != name)
            .nth(1)
            .cloned()
    };
    let unanchored = args.iter().any(|a| a == "--none");
    let w: u32 = arg("--width").and_then(|s| s.parse().ok()).unwrap_or(1920);
    let h: u32 = arg("--height").and_then(|s| s.parse().ok()).unwrap_or(1080);
    let compositor = crate::vdisplay::detect()?;
    let monitors = crate::vdisplay::monitors::list(compositor)?;
    println!(
        "anchor-test: {compositor:?} has {} monitor(s):",
        monitors.len()
    );
    for m in &monitors {
        println!(
            "  {:<12} {:>13} at +{},+{}",
            m.connector,
            m.mode_label(),
            m.x,
            m.y
        );
    }
    // Two heads at the same size is the case the ladder exists for; say so when the rig is right,
    // and say so when it is NOT — a green run on a single-head box proves nothing about it.
    let same_size = monitors.iter().enumerate().any(|(i, a)| {
        monitors
            .iter()
            .skip(i + 1)
            .any(|b| a.width == b.width && a.height == b.height)
    });
    println!(
        "anchor-test: two same-size heads present: {} {}",
        same_size,
        if same_size {
            "— this run exercises the case the ladder exists for"
        } else {
            "— WEAK RIG: size matching would have picked correctly anyway"
        }
    );
    if unanchored {
        crate::inject::set_absolute_anchor(None);
        println!("anchor-test: UNANCHORED (--none) — the size/first rungs decide");
    } else {
        let want = arg("--monitor")
            .or_else(crate::vdisplay::capture_monitor)
            .context("no monitor named — pass --monitor <CONNECTOR>, or --none for the A/B")?;
        let m = crate::vdisplay::monitors::resolve(&monitors, &want)?;
        crate::inject::set_absolute_anchor(Some(crate::inject::AbsoluteAnchor {
            origin: Some((m.x, m.y)),
            mapping_id: None,
        }));
        println!(
            "anchor-test: anchored at {} +{},+{} ({})",
            m.connector,
            m.x,
            m.y,
            m.mode_label()
        );
    }
    let backend = crate::inject::default_backend();
    if backend != crate::inject::Backend::Libei {
        // The ladder is libei's; on any other backend this command would report nothing about it.
        // Say so rather than emitting a green run that means nothing (sway injects via WlrVirtual,
        // which is why the sway box cannot serve as this rig — set PUNKTFUNK_INPUT_BACKEND=libei on
        // a compositor that speaks EI).
        anyhow::bail!(
            "input backend is {backend:?}, not libei — the absolute-region ladder only exists on \
             the libei backend; set PUNKTFUNK_INPUT_BACKEND=libei"
        );
    }
    let mut inj = crate::inject::open(backend)?;
    // libei establishes its portal/EIS session + device resume asynchronously; events before then
    // are dropped (and it is the resume that publishes the regions we are testing).
    std::thread::sleep(Duration::from_secs(4));
    let flags = (w << 16) | (h & 0xffff);
    let pts = [
        (w as i32 / 2, h as i32 / 2),
        (60, 60),
        (w as i32 - 60, 60),
        (w as i32 - 60, h as i32 - 60),
        (60, h as i32 - 60),
        (w as i32 / 2, h as i32 / 2),
    ];
    println!("anchor-test: walking {w}x{h} — centre, four corners, centre (1s apart)");
    for (x, y) in pts {
        let e = InputEvent {
            kind: InputKind::MouseMoveAbs,
            _pad: [0; 3],
            code: 0,
            x,
            y,
            flags,
        };
        if let Err(err) = inj.inject(&e) {
            tracing::warn!(error = %format!("{err:#}"), "anchor-test: inject failed");
        }
        std::thread::sleep(Duration::from_secs(1));
    }
    println!(
        "anchor-test: done — read the `libei: absolute input maps into this output` line above \
         for the region that was chosen"
    );
    Ok(())
 }
@@ -33,10 +33,16 @@ pub struct StreamConfig {
    pub hdr: bool,
 }
-/// A pooled capturer plus the two PipeWire-negotiation-time properties reuse must match on —
+/// A pooled capturer plus the three properties reuse must match on — its HDR-ness, its
-/// its HDR-ness and its metadata-cursor mode; a mismatch on either needs a fresh screencast
+/// metadata-cursor mode (both fixed at PipeWire-negotiation time) and **which screen it is
-/// session (see `AppState::video_cap`).
+/// actually capturing**: the `capture_monitor` pin, or `None` for the portal's own pick. A
-pub type PooledCapturer = (Box<dyn Capturer>, bool, bool);
+/// mismatch on any of them needs a fresh screencast session (see `AppState::video_cap`).
 ///
 /// The pin belongs in the key because it is a *live* setting — the console can re-aim the host
 /// between two GameStream connects (`design/per-monitor-portal-capture.md` §7.3). Without it the
 /// second connect would silently keep streaming the previous screen, which is the exact failure
 /// the pin exists to prevent.
 pub type PooledCapturer = (Box<dyn Capturer>, bool, bool, Option<String>);
 /// Slot for the persistent screen capturer, shared with the control plane and reused across
 /// streams so a reconnect doesn't open a second (conflicting) screencast session.
@@ -404,18 +410,31 @@ fn run(
        #[cfg(not(target_os = "linux"))]
        false
    };
    // Which screen this stream must show. The host-wide pin (§5.3) applies to the compat plane too:
    // the portal chooser cannot name a head, so a pinned host MIRRORS it here the same way the
    // virtual source does via `vdisplay::open`. Without this a Moonlight client on a pinned host
    // would silently get whichever monitor the portal handed back — "showing the wrong monitor is
    // worse than showing none" is the rule the whole feature is built on.
    #[cfg(target_os = "linux")]
    let pinned = crate::vdisplay::capture_monitor();
    #[cfg(not(target_os = "linux"))]
    let pinned: Option<String> = None;
    let pooled = match video_cap.lock().unwrap().take() {
-        Some((c, was_hdr, was_meta)) if was_hdr == cfg.hdr && was_meta == metadata_cursor => {
+        Some((c, was_hdr, was_meta, ref was_pin))
            if was_hdr == cfg.hdr && was_meta == metadata_cursor && *was_pin == pinned =>
        {
            Some(c)
        }
-        Some((c, was_hdr, was_meta)) => {
+        Some((c, was_hdr, was_meta, was_pin)) => {
            tracing::info!(
                was_hdr,
                want_hdr = cfg.hdr,
                was_metadata_cursor = was_meta,
                want_metadata_cursor = metadata_cursor,
-                "video source: pooled capturer depth/cursor-mode mismatch — opening a fresh \
+                was_monitor = was_pin.as_deref().unwrap_or("<portal's pick>"),
-                 screencast session"
+                want_monitor = pinned.as_deref().unwrap_or("<portal's pick>"),
                "video source: pooled capturer depth/cursor-mode/monitor mismatch — opening a \
                 fresh screencast session"
            );
            drop(c);
            None
@@ -427,6 +446,20 @@ fn run(
            tracing::info!("video source: reusing capturer");
            c
        }
        #[cfg(target_os = "linux")]
        None if pf_host_config::config().video_source.as_deref() == Some("portal")
            && pinned.is_some() =>
        {
            let connector = pinned.as_deref().expect("guarded by the match arm");
            tracing::info!(
                hdr = cfg.hdr,
                metadata_cursor,
                monitor = connector,
                "video source: mirroring the pinned monitor (portal source, host pin)"
            );
            open_gs_mirror_source(connector, cfg, metadata_cursor)
                .with_context(|| format!("mirror the pinned monitor {connector:?}"))?
        }
        None if pf_host_config::config().video_source.as_deref() == Some("portal") => {
            tracing::info!(
                hdr = cfg.hdr,
@@ -463,10 +496,10 @@ fn run(
    // point — and this path has no rebuild closure (unlike the virtual-output path above), so a
    // re-admitted dead capturer wedged GameStream portal video permanently, at 10 s per reconnect
    // attempt. Dropping it instead costs one fresh screencast session on the next connect. Note
-    // `result` may already be `Err` here, which is itself that signal. (`metadata_cursor` rides
+    // `result` may already be `Err` here, which is itself that signal. (`metadata_cursor` and the
-    // along as the second reuse key, beside HDR-ness — see `PooledCapturer`.)
+    // monitor pin ride along as the other two reuse keys, beside HDR-ness — see `PooledCapturer`.)
    if result.is_ok() && capturer.is_alive() {
-        *video_cap.lock().unwrap() = Some((capturer, cfg.hdr, metadata_cursor));
+        *video_cap.lock().unwrap() = Some((capturer, cfg.hdr, metadata_cursor, pinned));
    } else {
        tracing::info!(
            stream_failed = result.is_err(),
@@ -478,6 +511,53 @@ fn run(
    result
 }
 /// Open a capturer on the **pinned physical monitor** for the compat plane's portal source
 /// (`design/per-monitor-portal-capture.md` §5.3). The pin is host-wide, so it has to be honored on
 /// every plane that captures a screen — and the portal source is the one that otherwise takes
 /// "whichever head the portal hands back".
 ///
 /// Deliberately *not* the `open_gs_virtual_source` path: this source launches nothing and creates no
 /// virtual output, so it needs neither the game-lifetime machinery nor the registry (a mirror is
 /// [`DisplayOwnership::External`](crate::vdisplay::DisplayOwnership) and would pass straight through
 /// it anyway). A missing monitor fails the stream loudly rather than falling back to another screen.
 #[cfg(target_os = "linux")]
 fn open_gs_mirror_source(
    connector: &str,
    cfg: StreamConfig,
    metadata_cursor: bool,
 ) -> Result<Box<dyn Capturer>> {
    // Follow the live session first, exactly as the virtual source does — a mirror host that
    // switched Desktop↔Game since startup must be enumerated against the compositor that is up now.
    let active = crate::vdisplay::detect_active_session();
    crate::vdisplay::observe_session_instance(&active);
    crate::vdisplay::apply_session_env(&active);
    let compositor = crate::vdisplay::compositor_for_kind(active.kind)
        .map(Ok)
        .unwrap_or_else(crate::vdisplay::detect)
        .context("detect compositor")?;
    crate::vdisplay::apply_input_env(compositor, false);
    let mut vd = crate::vdisplay::open_mirror(compositor, connector)?;
    // Cursor mode is the session's negotiated one: metadata where this encode path composites
    // `frame.cursor`, otherwise let the compositor embed it (§7.5 — one resolver, per-backend
    // expression).
    vd.set_hw_cursor(metadata_cursor);
    // The mirror backend ignores the requested mode by design (§7.3 — a panel runs at the mode its
    // owner set, and the client scales); pass the client's anyway so the argument stays honest.
    let vout = vd
        .create(punktfunk_core::Mode {
            width: cfg.width,
            height: cfg.height,
            refresh_hz: cfg.fps,
        })
        .context("start mirroring the pinned monitor")?;
    crate::capture::capture_virtual_output(
        vout,
        pf_frame::OutputFormat::resolve(cfg.hdr, crate::zerocopy::enabled()),
        crate::session_plan::CaptureBackend::resolve(),
    )
    .context("attach a capturer to the mirrored monitor")
 }
 /// What the compat plane resolved about the app a client launched: identity for the lease, the status
 /// surface and the `game.*` events; the signals that recognize the running game; and the command to
 /// run it.
@@ -191,6 +191,77 @@ fn main() {
 /// prints an alarming `SetProcessDpiAwarenessContext … "access denied"` WARN on a plain
 /// `plugins add`. `service run` is the SCM-launched host itself, so it is explicitly NOT lightweight
 /// (it must keep the hook — the hybrid-GPU ACCESS_LOST fix depends on it).
 /// Resolve the effective monitor pin (env, else the stored policy) and aim absolute input at that
 /// head — then report it. Called at startup (an operator sets the pin in a `host.env` and then has
 /// no session to watch, so this is where a typo has to surface) and again whenever the console
 /// writes the policy, so a picker change re-aims input without a host restart.
 ///
 /// The anchor lives HERE rather than in the mirror backend for two reasons: pf-vdisplay must not
 /// depend on pf-inject (its crate doc), and the anchor is a host-level pin anyway — the injector is
 /// host-lifetime and shared by every concurrent session, so there is nothing per-session to track
 /// (`design/per-monitor-portal-capture.md` §7.2).
 #[cfg(target_os = "linux")]
 pub(crate) fn refresh_capture_monitor_anchor(context: &str) {
    let Some(want) = pf_vdisplay::capture_monitor() else {
        // No pin (or the console just cleared one): stop aiming input at a monitor we are no
        // longer mirroring, or a later virtual-display session inherits a stale anchor.
        // Setting a pin says so in the log; clearing one is the same size of change to what the
        // host streams, so say that too — but only when there WAS one, or every unpinned host
        // logs this line at startup for no reason.
        if pf_inject::absolute_anchor().is_some() {
            tracing::info!(
                context,
                "capture monitor: cleared — sessions create a virtual display again and absolute \
                 input is no longer anchored"
            );
        }
        pf_inject::set_absolute_anchor(None);
        return;
    };
    match pf_vdisplay::detect().and_then(pf_vdisplay::monitors::list) {
        Ok(ms) => match pf_vdisplay::monitors::resolve(&ms, &want) {
            Ok(m) => {
                // Match the libei region by the head's ORIGIN: two monitors can share a size — and
                // a mirrored head's region is not the client's size at all — so size matching would
                // put the pointer on the wrong screen.
                pf_inject::set_absolute_anchor(Some(pf_inject::AbsoluteAnchor {
                    origin: Some((m.x, m.y)),
                    mapping_id: None,
                }));
                tracing::info!(
                    context,
                    connector = %m.connector,
                    description = %m.description,
                    mode = %m.mode_label(),
                    at = %format!("+{}+{}", m.x, m.y),
                    "capture monitor: sessions will mirror this monitor (no virtual display) and \
                     absolute input is anchored to it"
                );
            }
            // Left unanchored on purpose: a pin that resolves to nothing must not aim input at a
            // guess. The session's own `create` fails with the same reason.
            Err(e) => {
                pf_inject::set_absolute_anchor(None);
                tracing::warn!(
                    context,
                    error = %e,
                    "capture monitor: the pinned monitor is not on this host — sessions will fail \
                     to start until it is corrected or cleared"
                );
            }
        },
        Err(e) => {
            pf_inject::set_absolute_anchor(None);
            tracing::warn!(
                context,
                error = %format!("{e:#}"),
                monitor = %want,
                "capture monitor: a monitor is pinned but the monitors could not be enumerated"
            );
        }
    }
 }
 fn is_management_cli(args: &[String]) -> bool {
    match args.first().map(String::as_str) {
        Some("plugins")
@@ -199,6 +270,9 @@ fn is_management_cli(args: &[String]) -> bool {
        | Some("openapi")
        | Some("library")
        | Some("detect-conflicts")
        // Reads the compositor's output list and exits — none of the host-startup work applies,
        // and it must not re-run the pin's own startup report while printing that same list.
        | Some("list-monitors")
        | Some("-h")
        | Some("--help")
        | Some("help")
@@ -231,6 +305,11 @@ fn real_main() -> Result<()> {
        );
    }
    #[cfg(target_os = "linux")]
    if !management_cli {
        refresh_capture_monitor_anchor("startup");
    }
    // Wire pf-vdisplay's display-lifecycle events into the SSE event bus (the subsystem crate emits a
    // neutral DisplayEvent; the orchestrator owns the bus type — plan §W6). Set once, ignore re-set.
    let _ = pf_vdisplay::DISPLAY_EVENT_SINK.set(Box::new(|ev| match ev {
@@ -411,6 +490,62 @@ fn real_main() -> Result<()> {
            println!("{compositor:?} ready");
            Ok(())
        }
        // List the host's physical monitors — the connector names `PUNKTFUNK_CAPTURE_MONITOR`
        // takes. An operator configuring an unattended host has to learn those names from
        // somewhere, and "curl the management API before the host is configured" is not it.
        #[cfg(target_os = "linux")]
        Some("list-monitors") => {
            let compositor = vdisplay::detect()?;
            let monitors = vdisplay::monitors::list(compositor)
                .with_context(|| format!("enumerate monitors on {compositor:?}"))?;
            if monitors.is_empty() {
                println!("{compositor:?}: no monitors");
                return Ok(());
            }
            let pinned = vdisplay::capture_monitor();
            println!("{compositor:?}:");
            for m in &monitors {
                let mut tags = Vec::new();
                if m.primary {
                    tags.push("primary");
                }
                if !m.enabled {
                    tags.push("disabled");
                }
                if m.managed {
                    tags.push("punktfunk virtual display");
                }
                if pinned
                    .as_deref()
                    .is_some_and(|p| p.eq_ignore_ascii_case(&m.connector))
                {
                    tags.push("PINNED");
                }
                println!(
                    "  {:<12} {:>13} at +{},+{}  scale {}  {}{}",
                    m.connector,
                    m.mode_label(),
                    m.x,
                    m.y,
                    m.scale,
                    m.description,
                    if tags.is_empty() {
                        String::new()
                    } else {
                        format!("  [{}]", tags.join(", "))
                    }
                );
            }
            Ok(())
        }
        // Mirror a pinned physical monitor and pull frames from it — the per-monitor capture
        // on-glass gate, with no client involved.
        #[cfg(target_os = "linux")]
        Some("mirror-test") => devtest::mirror_test(&args),
        // Aim absolute input at a named monitor and report which libei region it landed in — the
        // on-glass gate for the input-region ladder, with no client involved.
        #[cfg(target_os = "linux")]
        Some("anchor-test") => devtest::anchor_test(&args),
        // Create a virtual DualSense via UHID and exercise it (validation, no streaming session).
        #[cfg(target_os = "linux")]
        Some("dualsense-test") => devtest::dualsense_test(&args),
@@ -733,6 +868,8 @@ USAGE:
    punktfunk-host openapi                    print the management API's OpenAPI document (codegen)
    punktfunk-host punktfunk1-host [OPTIONS]  native punktfunk/1 host (QUIC control + UDP data plane)
    punktfunk-host probe-compositor           exit 0 iff the compositor is up + ready (bringup gate)
    punktfunk-host list-monitors              list the host's physical monitors (Linux) — the
                                              connector names PUNKTFUNK_CAPTURE_MONITOR takes
    punktfunk-host spike [OPTIONS]            capture→encode→file pipeline spike (dev tool)
 SERVE OPTIONS:
@@ -188,6 +188,7 @@ fn api_router_parts() -> (Router<Arc<MgmtState>>, utoipa::openapi::OpenApi) {
                .routes(routes!(display::get_display_settings))
                .routes(routes!(display::set_display_settings))
                .routes(routes!(display::get_display_state))
                .routes(routes!(display::get_display_monitors))
                .routes(routes!(display::release_display))
                .routes(routes!(display::set_display_layout))
                .routes(routes!(
@@ -88,6 +88,9 @@ pub(crate) fn display_settings_state() -> DisplaySettingsState {
            // (`vdisplay/windows/manager.rs`); stored-but-inert elsewhere.
            "ddc_power_off".into(),
            "pnp_disable_monitors".into(),
            // Linux-only in effect: routes every session to the mirror backend
            // (design/per-monitor-portal-capture.md).
            "capture_monitor".into(),
        ],
    }
 }
@@ -141,6 +144,10 @@ pub(crate) async fn set_display_settings(
        );
    }
    tracing::info!("management API: display policy updated");
    // The policy carries the capture-monitor pin, so a picker change must re-aim absolute input now
    // rather than at the next host restart — and must clear the anchor when the pin is cleared.
    #[cfg(target_os = "linux")]
    crate::refresh_capture_monitor_anchor("display policy updated");
    Json(display_settings_state()).into_response()
 }
@@ -181,6 +188,105 @@ pub(crate) struct DisplayStateResponse {
    displays: Vec<ApiDisplayInfo>,
 }
 /// One physical monitor this host has, as the compositor reports it.
 #[derive(Serialize, ToSchema)]
 pub(crate) struct ApiMonitorInfo {
    /// Connector name (`DP-1`, `HDMI-A-2`) — the value `PUNKTFUNK_CAPTURE_MONITOR` takes.
    connector: String,
    /// Human label for a picker (`make model`, else the connector).
    description: String,
    /// `WIDTHxHEIGHT@HZ` of the current mode (size only when the refresh is unknown).
    mode: String,
    /// Desktop-space top-left — what makes a head identifiable when two share a size.
    x: i32,
    y: i32,
    /// Logical scale factor.
    scale: f64,
    /// The compositor's primary/focused head.
    primary: bool,
    /// Driven right now. A disabled head is still listed, so it can be explained rather than missing.
    enabled: bool,
    /// Best-effort: this is one of OUR virtual displays, not a real head (reliable on KWin only).
    managed: bool,
    /// True when `PUNKTFUNK_CAPTURE_MONITOR` currently names this monitor.
    selected: bool,
 }
 /// The host's physical monitors + which one capture is pinned to.
 #[derive(Serialize, ToSchema)]
 pub(crate) struct MonitorsResponse {
    /// Compositor backend the enumeration came from (`kwin`, `mutter`, …), when one was resolved.
    compositor: Option<String>,
    /// The heads, ordered left-to-right by desktop position.
    monitors: Vec<ApiMonitorInfo>,
    /// The configured `PUNKTFUNK_CAPTURE_MONITOR`, if any — reported even when it matches nothing,
    /// so the console can show "pinned to DP-2, which this host doesn't have".
    pinned: Option<String>,
    /// Why the list is empty, when enumeration failed (compositor unreachable, unsupported
    /// platform). `None` with an empty list means "asked, and there are none".
    error: Option<String>,
 }
 /// Physical monitors
 ///
 /// The heads this host actually has — for pinning capture at one (`PUNKTFUNK_CAPTURE_MONITOR`) and
 /// for rendering a picker. Read-only: this never creates, moves or disables anything. Note these
 /// are *not* the managed virtual displays — those are `/display/state`. See
 /// `design/per-monitor-portal-capture.md` §5.1.
 #[utoipa::path(
    get,
    path = "/display/monitors",
    tag = "display",
    operation_id = "getDisplayMonitors",
    responses(
        (status = OK, description = "The host's physical monitors", body = MonitorsResponse),
        (status = UNAUTHORIZED, description = "Missing or invalid bearer token", body = ApiError),
    )
 )]
 pub(crate) async fn get_display_monitors() -> Json<MonitorsResponse> {
    // The EFFECTIVE pin (env override, else the stored policy) — so the picker highlights what
    // sessions will actually mirror, not just what the console last wrote.
    #[cfg(target_os = "linux")]
    let pinned = crate::vdisplay::capture_monitor();
    #[cfg(not(target_os = "linux"))]
    let pinned: Option<String> = None;
    // Enumeration shells out / round-trips D-Bus + Wayland, so keep it off the async worker.
    let (compositor, listed) = tokio::task::spawn_blocking(|| match crate::vdisplay::detect() {
        Ok(c) => (Some(c.id().to_string()), crate::vdisplay::monitors::list(c)),
        Err(e) => (None, Err(e)),
    })
    .await
    .unwrap_or_else(|e| (None, Err(anyhow::anyhow!("enumeration task failed: {e}"))));
    let (monitors, error) = match listed {
        Ok(ms) => (
            ms.into_iter()
                .map(|m| ApiMonitorInfo {
                    mode: m.mode_label(),
                    selected: pinned
                        .as_deref()
                        .is_some_and(|p| p.eq_ignore_ascii_case(&m.connector)),
                    connector: m.connector,
                    description: m.description,
                    x: m.x,
                    y: m.y,
                    scale: m.scale,
                    primary: m.primary,
                    enabled: m.enabled,
                    managed: m.managed,
                })
                .collect(),
            None,
        ),
        Err(e) => (Vec::new(), Some(format!("{e:#}"))),
    };
    Json(MonitorsResponse {
        compositor,
        monitors,
        pinned,
        error,
    })
 }
 /// Request body for `releaseDisplay`.
 #[derive(Deserialize, ToSchema)]
 pub(crate) struct ReleaseDisplayRequest {
@@ -298,6 +404,7 @@ pub(crate) async fn set_display_layout(ApiJson(req): ApiJson<DisplayLayoutReques
        store.game_session(),
        store.ddc_power_off(),
        store.pnp_disable_monitors(),
        store.get().capture_monitor,
    );
    if let Err(e) = store.set(policy) {
        return api_error(
@@ -1056,6 +1056,34 @@ async fn display_state_and_release_empty() {
    assert_eq!(body["released"], 0);
 }
 /// `/display/monitors` is wired, auth-gated, and — the point of the test — **always answers 200
 /// with a well-formed envelope**, including on a test host with no compositor to enumerate. The
 /// console renders a picker from this; an enumeration failure has to arrive as an `error` string
 /// next to an empty list, never as a 5xx that reads to the UI as "the host is broken".
 #[tokio::test]
 async fn display_monitors_answers_even_with_no_compositor() {
    let app = test_app(test_state(), None);
    let (status, body) = send(&app, get_req("/api/v1/display/monitors")).await;
    assert_eq!(status, StatusCode::OK);
    assert!(body["monitors"].is_array(), "monitors is always an array");
    // No compositor on the test host ⇒ either a clean empty list or an explained failure, never
    // both empty AND silent about why.
    let listed = body["monitors"].as_array().map(|a| a.len()).unwrap_or(0);
    // gamescope is nested: it owns no physical heads by construction, so "empty and silent" is the
    // correct answer there, not an unexplained one. A dev box that has ever been in game mode keeps
    // `gamescope-0` sockets in its runtime dir, so `detect()` resolves gamescope and this test would
    // otherwise fail on the machine rather than on the code (found running the suite on .136).
    let nested = body["compositor"] == "gamescope";
    assert!(
        listed > 0 || !body["error"].is_null() || body["compositor"].is_null() || nested,
        "an empty list must carry an error, an absent compositor, or a nested one: {body}"
    );
    // The pin is reported verbatim so the console can flag "pinned to a monitor you don't have";
    // unset on the test host.
    assert!(body["pinned"].is_null(), "no PUNKTFUNK_CAPTURE_MONITOR set");
 }
 #[tokio::test]
 async fn native_pairing_arm_show_and_unpair() {
    let np = Arc::new(
@@ -1003,6 +1003,9 @@ async fn serve_session(
    //     so a resize would resolve a DIFFERENT slot — on Windows a fresh monitor ADD instead of the
    //     in-place reconfigure, on KWin a differently-named output — defeating the policy's
    //     per-resolution identity. Honest downgrade: reject, client scales (H5).
    //   * a monitor MIRROR (a `capture_monitor` pin): a physical head runs at the mode its owner set
    //     and the mirror backend ignores the requested one, so a resize would restart the identical
    //     cast at the identical size (design/per-monitor-portal-capture.md §7.3).
    // The SYNTHETIC source stays reconfigurable on purpose (nothing to rebuild — the ack round-trip
    // is the whole effect): it is the compositor-free protocol test source, and the C-ABI roundtrip
    // test + client harnesses exercise the Reconfigure/Reconfigured plumbing through it.
@@ -1011,7 +1014,16 @@ async fn serve_session(
        let per_client_mode_identity = crate::vdisplay::policy::prefs()
            .configured_effective()
            .is_some_and(|e| e.identity == crate::vdisplay::policy::Identity::PerClientMode);
-        reconfig_allowed(compositor, per_client_mode_identity)
+        // Read once here, like the identity above: this session opened its display under whatever
        // the pin said at bring-up, so a console change mid-session must not retroactively change
        // what THIS session answers a Reconfigure with. Linux-only because `vdisplay::open` only
        // routes to the mirror there — a pin left in a Windows host's settings streams nothing
        // different, and must not silently disable resize as a side effect.
        #[cfg(target_os = "linux")]
        let mirrored = crate::vdisplay::capture_monitor().is_some();
        #[cfg(not(target_os = "linux"))]
        let mirrored = false;
        reconfig_allowed(compositor, per_client_mode_identity, mirrored)
    };
    // Negotiated codec (HEVC / H.264 / AV1), derived from the Welcome. `Copy`, so the control task's
    // `async move` captures a copy and it stays usable for the data-plane SessionContext below.
@@ -496,13 +496,20 @@ struct SendStats {
 ///   * a **per-client-mode identity** policy: the mode is part of the display-identity slot key, so a
 ///     resize resolves a DIFFERENT slot (a fresh Windows monitor / a differently-named KWin output),
 ///     defeating the policy — honest downgrade is to reject and let the client scale.
 ///   * a **monitor mirror** (`mirrored`): the source is a physical head running at the mode its owner
 ///     set, and `MirrorDisplay::create` ignores the requested one by design
 ///     (design/per-monitor-portal-capture.md §7.3). A resize would tear the cast down and re-`create`
 ///     the *same* head at the *same* size — a visible hitch that changes nothing — or, worse, invite
 ///     the reflex of reconfiguring the display someone is sitting in front of. Reject; the client
 ///     scales, exactly as it already does for gamescope.
 ///
 /// Every other compositor (and the synthetic protocol-test source) with the default identity accepts.
 pub(super) fn reconfig_allowed(
    compositor: Option<crate::vdisplay::Compositor>,
    per_client_mode: bool,
    mirrored: bool,
 ) -> bool {
-    compositor != Some(crate::vdisplay::Compositor::Gamescope) && !per_client_mode
+    compositor != Some(crate::vdisplay::Compositor::Gamescope) && !per_client_mode && !mirrored
 }
 #[allow(clippy::too_many_arguments)]
@@ -3524,22 +3531,39 @@ mod tests {
        use crate::vdisplay::Compositor::{Gamescope, Hyprland, Kwin, Mutter, Wlroots};
        // gamescope ALWAYS rejects — a resize would respawn the nested game (H1/D3), regardless of
        // the identity policy.
-        assert!(!reconfig_allowed(Some(Gamescope), false));
+        assert!(!reconfig_allowed(Some(Gamescope), false, false));
-        assert!(!reconfig_allowed(Some(Gamescope), true));
+        assert!(!reconfig_allowed(Some(Gamescope), true, false));
        // A per-client-mode identity policy rejects on every backend — the resize resolves a
        // different display-identity slot (H5).
-        assert!(!reconfig_allowed(Some(Kwin), true));
+        assert!(!reconfig_allowed(Some(Kwin), true, false));
-        assert!(!reconfig_allowed(Some(Mutter), true));
+        assert!(!reconfig_allowed(Some(Mutter), true, false));
-        assert!(!reconfig_allowed(None, true));
+        assert!(!reconfig_allowed(None, true, false));
        // Every other compositor with the default identity ACCEPTS (recreate / re-arrival / in-place).
        for c in [Kwin, Mutter, Wlroots, Hyprland] {
            assert!(
-                reconfig_allowed(Some(c), false),
+                reconfig_allowed(Some(c), false, false),
                "{c:?} should allow live reconfigure"
            );
        }
        // The synthetic source (no compositor) is the protocol-test path — always reconfigurable.
-        assert!(reconfig_allowed(None, false));
+        assert!(reconfig_allowed(None, false, false));
    }
    /// A mirrored physical head has a fixed mode (§7.3): every backend that would otherwise accept
    /// a live reconfigure must reject one while the session is streaming someone's real monitor.
    #[test]
    fn reconfig_allowed_rejects_a_monitor_mirror_on_every_backend() {
        use crate::vdisplay::Compositor::{Hyprland, Kwin, Mutter, Wlroots};
        for c in [Kwin, Mutter, Wlroots, Hyprland] {
            assert!(
                reconfig_allowed(Some(c), false, false),
                "{c:?} without a pin should still allow live reconfigure"
            );
            assert!(
                !reconfig_allowed(Some(c), false, true),
                "{c:?} mirroring a physical head must reject a resize"
            );
        }
    }
    #[test]
@@ -36,6 +36,7 @@ redundant or stale.
 |---|---|---|
 | `PUNKTFUNK_COMPOSITOR` | `kwin` · `mutter` · `gamescope` · `wlroots` · `hyprland` (aliases: `kde`/`plasma`, `gnome`, `sway`/`wlr`) | Which backend creates the virtual display. `wlroots` is sway/River; `hyprland` is its own backend. **Leave unset.** Setting it **pins** the backend and turns session-following **off** — per connect *and* mid-stream, so a Desktop ↔ Gaming switch kills the stream instead of being followed. For CI/tests and dedicated single-session appliances only. |
 | `PUNKTFUNK_VIDEO_SOURCE` | `virtual` · `portal` | `virtual` creates a per-client display at the client's exact mode (the normal choice). `portal` captures an existing monitor instead. |
 | `PUNKTFUNK_CAPTURE_MONITOR` | a connector name (`HDMI-A-1`, `DP-2`, …) | Stream a **physical** monitor this host already has instead of creating a virtual display — see [Streamed screen](/docs/virtual-displays#stream-a-real-monitor-instead). List the names with `punktfunk-host list-monitors`. Setting it here **outranks the web console's** choice, so an appliance stays aimed where its operator pointed it; leave it unset to steer from the console. A name that matches no monitor fails the session loudly rather than streaming a different screen. Linux only. |
 | `PUNKTFUNK_ZEROCOPY` | `1` · `0` *(default on)* | GPU zero-copy capture→encode (dmabuf → CUDA → NVENC, or D3D11 on Windows). **On by default** — no need to set it; it falls back to a CPU path automatically. Set `0` to force the CPU path. One exception: Windows **Intel/QSV** keeps the CPU path by default until zero-copy is validated on Intel hardware — set `1` to try it there. |
 | `PUNKTFUNK_INPUT_BACKEND` | `libei` · `gamescope` · `wlr` · `uinput` | How input is injected. `libei` for GNOME/KDE, `gamescope` for Bazzite/gamescope, `wlr` for Sway/wlroots **and Hyprland**. Auto-detected with the compositor. |
 | `PUNKTFUNK_ENCODER` | `auto` · `nvenc` · `vaapi` (Linux) · `amf` · `qsv` (Windows) · `software` | Encoder backend. `auto` (default) detects the GPU vendor: NVIDIA→NVENC, AMD→VAAPI/AMF, Intel→VAAPI/QSV. `software` (aliases `sw`/`openh264`) is the GPU-less H.264 path on both platforms — on Windows `auto` falls back to it when no GPU is found; on Linux it is **explicit-only** (`auto` never picks it). On a multi-GPU Windows box a forced hardware backend whose vendor contradicts the selected GPU (web-console preference) is **overridden** — the adapter wins and the host logs a warning; remove the stale pin. |
@@ -86,6 +86,33 @@ hosts from another machine with `punktfunk-probe --discover`. Where multicast do
 Docker/VLAN setups), pass `--no-mdns` (or set `PUNKTFUNK_MDNS=0`) and add the host in the client by
 address instead.
 ## `list-monitors`
 `punktfunk-host list-monitors` prints the **physical** monitors this host's compositor has, by
 connector name — which is how you name one for [Streamed
 screen](/docs/virtual-displays#stream-a-real-monitor-instead) (in the console, or as
 `PUNKTFUNK_CAPTURE_MONITOR`).
 ```sh
 punktfunk-host list-monitors
 ```
 ```
 Kwin:
  HDMI-A-1        1920x1080@60 at +0,+0    scale 1  Dell U2412M  [primary]
  DP-2            2560x1440@144 at +1920,+0  scale 1  ACME 27  [PINNED]
 ```
 Tags flag what's worth knowing before you pick: `primary`, `disabled` (nothing to stream), `punktfunk
 virtual display` (one of ours, not a real head), and `PINNED` for the one currently selected. Linux
 only — it reads the live compositor, so run it in (or with the environment of) the session you want
 to stream.
 `punktfunk-host mirror-test --monitor <CONNECTOR> [--seconds N] [--cpu]` then proves the whole path —
 mirror, capture, frames — with no client involved. It reports the first frame, the frame count and
 the negotiated size. Screen recording is damage-driven, so move the mouse on the host while it runs;
 an idle desktop legitimately yields almost nothing.
 ## `detect-conflicts`
 `punktfunk-host detect-conflicts` reports other Moonlight-compatible hosts (Sunshine, Apollo, and
@@ -26,6 +26,35 @@ systemctl --user enable --now punktfunk-host
 The host now starts whenever you log in. Check it with `systemctl --user status punktfunk-host`.
 **You don't need to export anything for it.** The host finds the live compositor session itself on
 every connect and works out where to reach it (`WAYLAND_DISPLAY`, `XDG_RUNTIME_DIR`, the session bus,
 sway's `SWAYSOCK`, Hyprland's instance signature) from the running compositor — so `host.env` is for
 policy, not session plumbing, and `systemctl --user import-environment` is not a prerequisite.
 ### Restart the host with your desktop
 Add one drop-in so the host follows your session's lifetime:
 ```sh
 mkdir -p ~/.config/systemd/user/punktfunk-host.service.d
 # /usr/share/punktfunk/ on Fedora/Arch, /usr/share/punktfunk-host/ on Debian/Ubuntu,
 # scripts/ in a source checkout
 cp /usr/share/punktfunk/punktfunk-host-desktop-session.conf \
   ~/.config/systemd/user/punktfunk-host.service.d/desktop-session.conf
 systemctl --user daemon-reload
 systemctl --user reenable punktfunk-host
 systemctl --user restart punktfunk-host
 ```
 Without it, restarting Plasma or GNOME — a crash, a log out and back in, "restart the shell" — leaves
 the host running against a compositor that no longer exists. It keeps listening and answering, and
 every session after that fails at capture, which is a confusing way to find out. The drop-in makes a
 compositor restart a host restart.
 Skip it on the headless/appliance route below (which has its own session unit), and on Sway or
 Hyprland, which don't hand their session to systemd — start the host from the compositor's config
 there instead, so it comes and goes with the session.
 ## B. A headless, always-on host
 To run with **no monitor and no login** — a machine in a closet that's always ready — you need two
@@ -18,6 +18,10 @@ opened on.
 > Reach for a preset when you want a specific experience — a dedicated box you only stream from, a
 > desktop you also use in person, or a multi-monitor workstation.
 If you'd rather stream a monitor the host **already has** than have punktfunk make one, that's a
 different setting and it turns most of this page off — see
 [Stream a real monitor instead](#stream-a-real-monitor-instead) right below.
 > **What's live today:** **keep-alive** (linger, or **forever**), **topology** (extend / primary /
 > exclusive), **conflict handling**, **per-client identity + persistent scaling** (Windows, KDE/KWin
 > *and* GNOME/Mutter), and **multi-monitor layout** (several clients as monitors of one desktop) are
@@ -25,6 +29,71 @@ opened on.
 > second. The remaining gaps are noted inline: the Linux `primary` physical-keep *effect*, Sway
 > `exclusive`, and multi-display for a *single* client (that last is the next stage).
 ## Stream a real monitor instead
 Sometimes you don't want a new screen — you want *that* screen. A shop-floor PC on a wall mount, a
 lab bench machine, a media box whose TV output you'd like to watch from the couch: what matters is
 seeing the monitor that's already there, exactly as the person in front of it sees it.
 Set **Host → *Virtual displays* → Streamed screen** to one of the listed monitors and punktfunk stops
 creating a virtual display altogether. It streams that physical monitor instead, and every client
 sees it at *its* resolution — you're a viewer of a screen, not the owner of your own.
 - The monitor is **never touched**. punktfunk doesn't resize it, move it, disable it or restore it —
  it only watches. Keep-alive, topology and the multi-monitor layout options above simply don't
  apply, because there's no display of ours to apply them to.
 - **The resolution is the monitor's**, not yours. A client asking for a different one is politely
  told no and scales its own picture — reconfiguring the display someone is sitting at would be
  rude, and the mid-stream resize machinery is switched off for this reason.
 - **Every client sees the same screen.** Two clients means two viewers of one monitor, not two
  desktops.
 - Naming a monitor that isn't there is a **hard error**, not a fallback: the session fails with
  `no monitor named "DP-9" — this host has: HDMI-1`. Showing you the wrong screen would be worse
  than showing you none.
 - Choosing **Virtual screen (default)** in the same card puts you back on the normal path.
 Supported on **KDE/KWin**, **GNOME/Mutter**, **Sway/wlroots** and **Hyprland** — each through the
 compositor's own screen-recording API, so there is **no chooser dialog** and nothing to click. That
 matters most for a host running unattended as a [service](/docs/running-as-a-service): a background
 `systemd --user` daemon has nobody to answer a permission prompt, so the monitor has to be
 configuration rather than a question. (A nested gamescope session has no physical monitors of its
 own, so the setting doesn't appear there.)
 ### Naming the monitor from the host
 Monitors are named by **connector** — `HDMI-A-1`, `DP-2`, `eDP-1`. List what this host has:
 ```sh
 punktfunk-host list-monitors
 ```
 ```
 Kwin:
  HDMI-A-1        1920x1080@60 at +0,+0    scale 1  Dell U2412M  [primary]
  DP-2            2560x1440@144 at +1920,+0  scale 1  ACME 27
 ```
 To pin it **from the host's configuration** instead of the console — the appliance route — set it in
 [`host.env`](/docs/configuration):
 ```sh
 PUNKTFUNK_CAPTURE_MONITOR=HDMI-A-1
 ```
 The environment variable **wins over the console setting**, deliberately: an operator who declared
 the answer in the unit's environment shouldn't have it re-aimed by a click. The console shows the
 Streamed screen card as locked while it's set. Leave it unset on a machine you want to steer from the
 console.
 Check the whole path — mirror, capture, frames — without a client involved:
 ```sh
 punktfunk-host mirror-test --monitor HDMI-A-1 --seconds 20
 ```
 Compositor screen recording is **damage-driven**: an idle desktop legitimately produces almost no
 frames, so move the mouse on the host while it runs or a working mirror reads as a stall.
 ## Pick a preset
 A preset is the easy way in — select one in the console and you're done. Each expands to a bundle of
@@ -252,6 +321,20 @@ landing on a dead stream — and switching between game mode and the KDE / GNOME
 follows the switch. If a launched game **exits**, a dedicated session ends and returns you to your
 library; a game mode / desktop session keeps streaming.
 **My keep-alive / topology / layout settings do nothing.** Check whether **Streamed screen** is set
 to a real monitor. Those options are all about a display punktfunk created; when it's mirroring one
 of yours there is nothing of ours to keep alive or rearrange. Switch the card back to *Virtual screen
 (default)* to get them back.
 **The console won't let me change Streamed screen.** `PUNKTFUNK_CAPTURE_MONITOR` is set in this
 host's [`host.env`](/docs/configuration) and deliberately outranks the console. Unset it (and restart
 the host) to choose from the console instead.
 **My session fails with "no monitor named …".** The pinned connector isn't among this host's
 monitors — it was renamed, unplugged, or the host is now in a different session. Run
 `punktfunk-host list-monitors` on the host to see the real names. punktfunk will not quietly stream a
 different screen instead.
 **My couch box's TV stayed on the streamed session after I disconnected.** With the **Headless box**
 preset (keep alive = *forever*), a managed Steam session is held indefinitely so a reconnect resumes
 instantly — return to game mode on the box (or restart the host) to hand the TV back.
@@ -0,0 +1,74 @@
 Update whenever it suits you — the app and the machine you stream from can be updated one at a time, and everything already paired keeps working.
 ## New: stream one of your actual monitors, not just a virtual screen
 Until now, Punktfunk's Linux host always created its own virtual display to stream from — even on a machine you're sitting in front of, with real monitors already showing something. You can now point it at one of your machine's real monitors instead: pick it from a new **Streamed screen** card in the console, or pin it once in the host's configuration for an unattended box.
 The monitor keeps working exactly as it always did — Punktfunk mirrors it rather than taking it over, so nothing about your own setup changes. It streams at that monitor's own resolution and refresh rate; your device scales to fit. Works with **KWin, GNOME, sway and Hyprland**, in both the Punktfunk app and Moonlight, and applies whether you connect straight away or pick up a saved display preset later.
 A machine you pin from the host's own configuration shows the choice in the console as locked, with the reason, rather than offering a control that would silently lose to it. And on a machine you actually log into day to day (rather than a dedicated streaming box), the host now restarts itself when your desktop session does, so it recovers on its own instead of quietly going stale until the next stream fails to start.
 For headless and unattended setups, two new commands help you find and verify the right monitor without a screen attached: `punktfunk-host list-monitors` lists what the machine has (names, geometry, which one is pinned), and `punktfunk-host mirror-test` confirms frames are actually flowing from the one you picked.
 ## Fixed: newer KDE Plasma silently fell back to a slower, less reliable way to arrange displays
 On current KDE Plasma (6.7 and newer), Punktfunk's direct way of talking to the desktop about display layout stopped seeing any displays at all, with no visible error — every session quietly fell back to an external helper tool that's known to hang under load, exactly the thing the previous release's Plasma fix was meant to stop relying on. Fixed: Punktfunk now recognizes both the way older and newer Plasma releases announce their displays.
 ## Fixed: installing or updating the Windows host
 Three separate reports came in within hours of the last release, all blocking install:
 - **`winget install` could fail outright if you'd ever had another streaming host on the machine** — even one you had since disabled or mostly uninstalled. A leftover, disabled service or an empty folder from an old install was enough to trip the "conflicting host" check and abort. Only a host actually set to start on its own counts now.
 - **Installing through a package-manager app (like UniGetUI) could fail with a file-path error** before the install wizard ever appeared, because of a broken setting the installer passed itself. Fixed.
 - **The package source instructions were incomplete.** `winget install unom.PunktfunkHost` says "no package found" until you've pointed winget at Punktfunk's own source, once per machine — the command for that is now spelled out.
 ## Fixed: Moonlight compatibility no longer turns on without asking
 A fresh Windows install used to enable Moonlight-app compatibility silently, with no checkbox ever shown — even though that mode pairs over a less secure connection and the host warns about it on every start. It's opt-in now. Existing installs are untouched either way; Punktfunk's own clients were never affected.
 ## Fixed: switching into Steam's Game Mode on Linux could black out the machine
 The previous release shipped the permission needed to properly take over the screen for Steam's Game Mode — and surfaced a few sharp edges that only show up once that takeover is actually live:
 - **The takeover could kill Punktfunk's own background service a few seconds later**, leaving the display dark with nothing left to bring it back except a physical console or SSH.
 - **It could also hang waiting on a permission prompt nobody could see**, delaying recovery until well after the stream had already dropped — or act on a leftover marker file from months ago and jump the machine to the desktop for no reason.
 - **Restarting the host mid-stream** — including a routine update — **could leave the display stuck off**, since nothing told the screen to come back.
 All three are fixed. Recognizing the machine's built-in Steam Game Mode may now need a one-time permission on some distributions; installing or updating normally takes care of it.
 ## Fixed: a laptop with its built-in screen turned off stuttered constantly
 On a laptop with two graphics chips and the internal screen switched off — a common setup for streaming from a laptop docked to a TV or monitor — streaming stuttered roughly every two seconds, for the whole session. Punktfunk now recognizes a dark-but-connected laptop screen as the cause and points at the actual fix, instead of pointing at an external monitor that isn't the problem.
 ## Fixed: latency creeping up over the course of a fast, high-bitrate stream
 On a fast local network, especially at higher bitrates, latency could climb steadily over a long session instead of staying flat. Several separate causes are fixed at once: the stream's internal clock sync could get starved by a busy connection and let the two ends' clocks drift; a stream mode could put more data on the wire than its bitrate setting actually allowed; a slow-to-decode moment could build up a backlog that took a while to work through instead of catching up immediately; and the one-time startup speed test could be mistaken for real network congestion and permanently cap the stream below what the connection could actually handle.
 ## Fixed: missing cover art looked broken
 A library entry with no cover art showed as an empty grey box, which read as something that failed to load. It now shows a controller icon instead, so "no art yet" looks intentional rather than broken.
 ## Improved: the Windows app now keeps its own log file
 The desktop app writes its own log to `%LOCALAPPDATA%\punktfunk\logs\client.log` now, instead of only printing to a console window that a normal launch never shows. If you're ever asked to send logs for a problem, this is where they are.
 ## Under the hood (for developers)
 - **Nothing changed on the wire.** Streaming protocol stays at version **2**, the embeddable C ABI at **13**, the Windows virtual-display driver protocol at **6** — 0.18–0.21 hosts and clients keep mixing freely. `GET /display/monitors` is a new endpoint (always 200, an explained empty list on a compositor-less host or a nested gamescope session); the display policy gains an optional `capture_monitor` field, resolved env-over-policy so a host.env pin outranks a console change. Both are additive.
 - **Monitor enumeration is one read per compositor**, beside the code that already speaks its dialect: KWin's `kde_output_device_v2`, Mutter's `DisplayConfig.GetCurrentState`, `swaymsg get_outputs` (through a `swaymsg_query` helper after the bare command form mis-parsed `-t get_outputs` as an unknown command), `hyprctl monitors`. Logical geometry throughout — origin, not size, is what identifies a head.
 - **Mirroring routes through `vdisplay::open` on all four backends**, arriving as a `VirtualDisplay` with `DisplayOwnership::External`, which by construction gets no keep-alive, no topology participation and no reuse, and ignores the client's requested mode — a real monitor runs at the mode its owner set. KWin uses `zkde_screencast`'s `stream_output` (the connector name is the selection, no dialog); Mutter uses the same private ScreenCast session the virtual path drives, `RecordMonitor` instead of `RecordVirtual`, deliberately outside the topology lock since mirroring adds or removes nothing; sway and Hyprland reuse their existing portal-chooser config (`xdpw`'s `Monitor: NAME`, `xdph`'s `[SELECTION]screen:NAME`), now serialized against the handshake that reads it. A mirrored display refuses a mid-stream reconfigure (Linux only — a pin on Windows streams nothing different).
 - **The GameStream/Moonlight portal source now honors the pin too** — it previously always went straight to the portal chooser regardless — reusing the same `MirrorDisplay` path, with which screen a pooled capturer is showing added as a reuse key beside HDR-ness and cursor mode, so a live pin change between two connects can't leave a client streaming the previous screen.
 - **libei absolute-coordinate resolution changed from matching by mode size to `mapping_id` → origin → size → first**, since two outputs can share a size but never a top-left, and a mirrored head's region is not the client's stream size at all. A named anchor that matches nothing falls back down the ladder rather than stranding input, and both a miss and a match now log once per distinct answer. `punktfunk-host anchor-test` exercises the ladder against a live compositor with two same-sized outputs — the one case a unit test can only simulate.
 - **`SWAYSOCK` is now derived rather than required to be inherited** — by the compositor's known PID, then the newest socket owned by the host's user — closing the last session variable a `systemd --user` host lacked for sway. A new drop-in (`PartOf`/`WantedBy` on `graphical-session.target`, opt-in, shipped under `/usr/share`) restarts a desktop-login host with its desktop, so a Wayland socket and portal connection that die with a Plasma/GNOME restart don't leave the daemon silently unable to recover.
 - **KWin's in-process output-management path now also binds `kde_output_device_registry_v2`**, not just the per-output `kde_output_device_v2` globals it originally shipped with — KWin 6.7 stopped advertising the latter, so the module written specifically to avoid shelling out to `kscreen-doctor` (0.19.x) saw zero devices and silently degraded to it on every session. Both models are supported now; registry-sourced devices arrive one Wayland round-trip later, so the handshake gains one conditional extra barrier.
 - **Windows conflict detection** now keys on the competing service's `Start` registry value (0–2 = boot/system/auto only), matching the tray's own dormant-is-harmless logic from last release; install directories no longer count.
 - **The winget `Log` switch used the literal string `|LOGPATH|`** instead of winget's actual `<LOGPATH>` substitution token, so Inno received an illegal filename on any install that requested a log (UniGetUI does by default). Guarded by a new manifest check.
 - **`gamestream` installer task lost its default-checked flag**; a silent/unattended install now lands `PUNKTFUNK_HOST_CMD=serve`. `/MERGETASKS=gamestream` opts in. Fresh installs only — `GamestreamParam` already omitted the flag on upgrades.
 - **The gamescope display-manager takeover** now calls privileged `systemctl` verbs non-interactively (`--no-ask-password`) so a headless polkit prompt can no longer block the stream's own recovery thread; `session_select_requested`'s sentinel baseline is now recorded at takeover time as well as at successful launch, closing a window where a months-old `~/.config/steamos-session-select` write could false-positive a session-select honor; and `punktfunk-host` now handles SIGTERM/SIGINT by restoring the display manager it stopped (20 s grace) before exiting, so a `systemctl --user restart` or package upgrade mid-takeover can't strand the box. The takeover also now ensures the invoking user has systemd lingering enabled before touching the display manager — without it, stopping the DM stops the user's own service manager ~10 s later and takes the host down with it.
 - **A new `internal_panel` target class** lets the exclusive-topology stall detector name a deactivated eDP/LVDS laptop panel as a disturbance suspect; previously the suspect list was filtered to external physicals only, so the one display responsible on a hybrid laptop reported as none. `EvtIddCxMonitorI2CTransmit/Receive` now answer every DDC/CI probe against the virtual monitor with an immediate `STATUS_NOT_SUPPORTED`, so third-party brightness/monitor tools stop occupying win32k's serialized physical-monitor path on it. The swap-chain drain thread now falls back to `TIME_CRITICAL` priority if MMCSS registration is refused, and raises `IddMinimumVersionRequired` 4 → 10 to use `IddCxSetRealtimeGPUPriority`.
 - **Clock re-sync** now spaces its probe rounds ~7 ms apart, tracks a running best-RTT guard band instead of a static connect-time floor, and applies the best batch of a rejection streak after three consecutive rejections rather than drifting unbounded.
 - **A new per-frame `WireBudget`** (shared between encoder backends) tracks the real bitstream-to-wire inflation ratio for datagram-aligned PyroWave sessions and deflates the rate-control target by it, so the configured bitrate pin holds on the wire rather than on the raw codec bitstream.
 - **The pre-decode frame channel now drains to the newest AU for all-intra (PyroWave) streams**, since those have no reference chain forbidding a mid-stream drop — capping any standing backlog at roughly one frame instead of ratcheting between the coarse jump-to-live thresholds.
 - **The ABR capacity probe's first post-probe report window is now discarded outright**, rather than measured, so the probe's own deliberate overload can no longer read as session congestion and permanently end slow-start early.
 - **New CI-only fix:** the winget release-verification step's `envs:` allow-list was a step-level sibling of `with:`/`env:` instead of nested inside `with:`, so `appleboy/ssh-action` never actually received it as an input and the step kept failing on every tag. Moved to match how `REGISTRY_TOKEN` is already forwarded elsewhere.
 - **New dev tooling:** `display-disturb` reproduces DDC/CI and modeset-class display disturbances on demand for stall-immunity testing; `punktfunk-host anchor-test`/`mirror-test` are described above. None of this ships to end users.
@@ -161,6 +161,12 @@ package_punktfunk-host() {
  install -Dm0644 "$R/scripts/punktfunk-host.service" "$pkgdir/usr/lib/systemd/user/punktfunk-host.service"
  sed -i 's#%h/punktfunk/target/release/punktfunk-host#/usr/bin/punktfunk-host#' \
    "$pkgdir/usr/lib/systemd/user/punktfunk-host.service"
  # Optional drop-in for a DESKTOP-LOGIN host: binds the host to graphical-session.target so a
  # Plasma/GNOME restart restarts it instead of leaving it on a dead compositor connection. Shipped
  # under /usr/share (NOT as an active drop-in) because it is wrong for the appliance route — the
  # operator copies it into ~/.config/systemd/user/punktfunk-host.service.d/ when they want it.
  install -Dm0644 "$R/scripts/punktfunk-host-desktop-session.conf" \
    "$pkgdir/usr/share/punktfunk/punktfunk-host-desktop-session.conf"
  install -Dm0644 "$R/scripts/punktfunk-kde-session.service" "$pkgdir/usr/lib/systemd/user/punktfunk-kde-session.service"
  sed -i 's#%h/punktfunk/scripts/headless/run-headless-kde.sh#/usr/share/punktfunk/headless/run-headless-kde.sh#' \
    "$pkgdir/usr/lib/systemd/user/punktfunk-kde-session.service"
@@ -67,6 +67,12 @@ install -Dm0644 scripts/punktfunk-host.service     "$STAGE/usr/lib/systemd/user/
 # /usr/bin. Rewrite it so a fresh apt install (no hand-rolled unit) starts the installed binary.
 sed -i 's#%h/punktfunk/target/release/punktfunk-host#/usr/bin/punktfunk-host#' \
    "$STAGE/usr/lib/systemd/user/punktfunk-host.service"
 # Optional drop-in for a DESKTOP-LOGIN host: binds the host to graphical-session.target so a
 # Plasma/GNOME restart restarts it instead of leaving it on a dead compositor connection. Shipped
 # under /usr/share (NOT as an active drop-in) because it is wrong for the appliance route — the
 # operator copies it into ~/.config/systemd/user/punktfunk-host.service.d/ when they want it.
 install -Dm0644 scripts/punktfunk-host-desktop-session.conf \
    "$STAGE/usr/share/punktfunk-host/punktfunk-host-desktop-session.conf"
 # Optional headless KWin session unit (the kwin --virtual appliance), as the RPM/Arch ship.
 # Repoint its ExecStart from the dev source tree to the packaged script. NOT enabled by default.
 install -Dm0644 scripts/punktfunk-kde-session.service "$STAGE/usr/lib/systemd/user/punktfunk-kde-session.service"
@@ -284,6 +284,11 @@ install -Dm0644 scripts/punktfunk-host.service %{buildroot}%{_userunitdir}/punkt
 # The source unit's ExecStart points at the dev source tree; a packaged install has the binary at
 # %{_bindir}. Rewrite it so a fresh install (no hand-rolled unit) starts the installed binary.
 sed -i 's#%h/punktfunk/target/release/punktfunk-host#%{_bindir}/punktfunk-host#' %{buildroot}%{_userunitdir}/punktfunk-host.service
 # Optional drop-in for a DESKTOP-LOGIN host: binds the host to graphical-session.target so a
 # Plasma/GNOME restart restarts it instead of leaving it on a dead compositor connection. Shipped
 # under %{_datadir}/%{name} (NOT as an active drop-in) because it is wrong for the appliance route —
 # the operator copies it into ~/.config/systemd/user/punktfunk-host.service.d/ when they want it.
 install -Dm0644 scripts/punktfunk-host-desktop-session.conf %{buildroot}%{_datadir}/%{name}/punktfunk-host-desktop-session.conf
 # Optional headless KDE session unit (the kwin streaming appliance): brings up `kwin --virtual` on
 # wayland-kde via the packaged run-headless-kde.sh, so the host's kwin backend has a session whose
@@ -0,0 +1,42 @@
 # systemd USER drop-in: bind the host to the DESKTOP LOGIN session's lifetime.
 #
 # Install (on top of punktfunk-host.service):
 #   mkdir -p ~/.config/systemd/user/punktfunk-host.service.d
 #   cp scripts/punktfunk-host-desktop-session.conf \
 #      ~/.config/systemd/user/punktfunk-host.service.d/desktop-session.conf
 #   systemctl --user daemon-reload
 #   systemctl --user reenable punktfunk-host      # picks up the [Install] below
 #   systemctl --user restart punktfunk-host
 #
 # WHY: the shipped unit's `PartOf=punktfunk-kde-session.service` covers the APPLIANCE route, where we
 # start the compositor ourselves. A host on a machine somebody logs into has no such unit — so when
 # Plasma or GNOME restarts (a crash, a session logout/login, "restart the shell"), the daemon keeps
 # running while holding a Wayland socket and a portal D-Bus connection that both died with the old
 # compositor. It cannot recover those in-process. It is a quiet failure — the host still listens, still
 # answers, and every session it then serves fails at capture. A host that mirrors a monitor
 # (design/per-monitor-portal-capture.md) sits idle for days between sessions, which is exactly the
 # shape that gets discovered at the worst moment.
 #
 # `graphical-session.target` is the session's own lifetime, reached by GNOME and Plasma under systemd
 # session management. `PartOf=` stops us when it goes down; the `WantedBy=` below starts us again when
 # the new session brings it back up. So a compositor restart becomes a host restart, with a fresh
 # connection to the compositor that is actually there.
 #
 # NOT for the appliance/headless route (a pinned PUNKTFUNK_COMPOSITOR, punktfunk-kde-session.service,
 # a gamescope box): those have their own session unit and may never reach graphical-session.target at
 # all, and this drop-in would leave the host permanently stopped.
 #
 # Sway / Hyprland / any session NOT managed by systemd never reaches graphical-session.target either.
 # There the drop-in is harmless but does nothing; start the host from the compositor's own config
 # instead (`exec systemctl --user start punktfunk-host` after `systemctl --user import-environment`),
 # so it dies and comes back with the session.
 [Unit]
 After=graphical-session.target
 PartOf=graphical-session.target
 [Install]
 # In ADDITION to the base unit's WantedBy=default.target, so the host still comes up at login even
 # before the graphical session is ready — it listens without touching the compositor and only opens
 # one per client connect, so an early start costs nothing.
 WantedBy=graphical-session.target
@@ -8,6 +8,18 @@
 #   cp scripts/host.env.example ~/.config/punktfunk/host.env   # defaults are right for a desktop
 #   systemctl --user daemon-reload && systemctl --user enable --now punktfunk-host
 #
 # On that desktop-login route, ALSO install scripts/punktfunk-host-desktop-session.conf as a drop-in:
 # it binds the host to graphical-session.target, so a Plasma/GNOME restart restarts the host instead
 # of leaving it holding a dead Wayland socket + portal connection (the PartOf= below only covers the
 # appliance route, where we start the compositor ourselves). The drop-in's header has the commands.
 #
 # The host does NOT need the login shell's environment: it detects the live session itself per
 # connect and derives WAYLAND_DISPLAY, XDG_RUNTIME_DIR, DBUS_SESSION_BUS_ADDRESS, XDG_CURRENT_DESKTOP,
 # HYPRLAND_INSTANCE_SIGNATURE and SWAYSOCK from the running compositor (vdisplay::apply_session_env).
 # So host.env carries policy, not session plumbing, and `systemctl --user import-environment` is not
 # a prerequisite — the host pushes the live values into the manager env itself when a session switch
 # needs the portal to re-read them.
 #
 # Self-contained boot appliance (no login, no manual steps after boot). These routes PIN the
 # backend via PUNKTFUNK_COMPOSITOR — correct for a dedicated single-session box, but it turns off
 # live-session auto-detection, so never do it on a desktop that switches sessions (Game Mode etc.):
@@ -414,5 +414,16 @@
  "session_game_grace_help": "Wie lange ein verschwundener Client Zeit hat zurückzukommen, bevor sein Spiel geschlossen wird. Die Konsole zeigt den Countdown; eine neue Verbindung bricht ihn ab.",
  "session_game_saved": "Sitzungs- und Spieleinstellungen gespeichert",
  "session_game_inert": "Dieser Host kann keine Spiele starten – hier bewirken diese Einstellungen nichts",
-	"session_game_nested_note": "In einer gamescope-Spielsitzung läuft das Spiel *innerhalb* der gestreamten Anzeige und lebt daher genau so lange wie diese – das entscheidet „Offen halten“ oben, nicht diese Einstellung. Ein bewusstes Stoppen reißt die Anzeige sofort ab und nimmt das Spiel mit, egal was du hier wählst."
+  "session_game_nested_note": "In einer gamescope-Spielsitzung läuft das Spiel *innerhalb* der gestreamten Anzeige und lebt daher genau so lange wie diese – das entscheidet „Offen halten“ oben, nicht diese Einstellung. Ein bewusstes Stoppen reißt die Anzeige sofort ab und nimmt das Spiel mit, egal was du hier wählst.",
  "display_monitor_title": "Übertragener Bildschirm",
  "display_monitor_intro": "Standardmäßig erstellt der Host für jeden Client einen eigenen virtuellen Bildschirm in dessen Auflösung. Stattdessen kannst du einen Bildschirm übertragen, den dieser Computer bereits hat — was auf diesem Monitor zu sehen ist, sieht auch der Client.",
  "display_monitor_virtual": "Virtueller Bildschirm (Standard)",
  "display_monitor_virtual_hint": "Jeder Client bekommt einen eigenen Bildschirm in eigener Auflösung.",
  "display_monitor_mirror_hint": "Alle Clients sehen diesen Monitor in dessen Auflösung.",
  "display_monitor_none": "Dieser Host meldet keine Monitore.",
  "display_monitor_unavailable": "Monitore konnten auf diesem Host nicht ermittelt werden.",
  "display_monitor_env_locked": "Auf diesem Host über PUNKTFUNK_CAPTURE_MONITOR festgelegt — dort entfernen, um hier zu wählen.",
  "display_monitor_primary": "primär",
  "display_monitor_disabled": "aus",
  "display_monitor_saved": "Übertragener Bildschirm gespeichert"
 }
@@ -414,5 +414,16 @@
  "session_game_grace_help": "How long a client that vanished has to come back before its game is closed. The console shows the countdown, and reconnecting cancels it.",
  "session_game_saved": "Session and game settings saved",
  "session_game_inert": "This host has no way to launch games, so these settings do nothing here",
-	"session_game_nested_note": "On a gamescope game session the game runs *inside* the streamed display, so it lives exactly as long as that display does — which is what Keep alive above decides, not this setting. A deliberate Stop tears that display down at once and takes the game with it, whichever option you pick here."
+  "session_game_nested_note": "On a gamescope game session the game runs *inside* the streamed display, so it lives exactly as long as that display does — which is what Keep alive above decides, not this setting. A deliberate Stop tears that display down at once and takes the game with it, whichever option you pick here.",
  "display_monitor_title": "Streamed screen",
  "display_monitor_intro": "By default the host creates its own virtual screen for each client, sized to that client. Instead, you can stream one of the screens this computer already has — what you see on that monitor is what the client sees.",
  "display_monitor_virtual": "Virtual screen (default)",
  "display_monitor_virtual_hint": "Each client gets its own screen at its own resolution.",
  "display_monitor_mirror_hint": "Every client sees this monitor, at its resolution.",
  "display_monitor_none": "This host reports no monitors.",
  "display_monitor_unavailable": "Monitors could not be listed on this host.",
  "display_monitor_env_locked": "Pinned by PUNKTFUNK_CAPTURE_MONITOR on this host — unset it to choose here.",
  "display_monitor_primary": "primary",
  "display_monitor_disabled": "off",
  "display_monitor_saved": "Streamed screen saved"
 }
@@ -189,6 +189,10 @@ const DisplayForm: FC<{
 				game_session: draft.game_session ?? "auto",
 				ddc_power_off: draft.ddc_power_off ?? false,
 				pnp_disable_monitors: draft.pnp_disable_monitors ?? false,
 				// Which screen we stream is not a display-behavior axis at all — swapping the
 				// streamed screen out from under the operator because they changed a preset would be
 				// the worst kind of surprise.
 				capture_monitor: draft.capture_monitor ?? null,
 			});
 		} else {
 			apply({ ...draft, preset: id as Preset });
@@ -206,6 +210,11 @@ const DisplayForm: FC<{
 			// The experimental axes aren't part of a preset — keep the current settings.
 			ddc_power_off: draft.ddc_power_off ?? false,
 			pnp_disable_monitors: draft.pnp_disable_monitors ?? false,
 			// Nor is the streamed screen: this builds a FRESH policy object rather than spreading
 			// the draft, so anything not named here is silently dropped — which is exactly how
 			// applying a saved preset used to switch a mirroring host back to a virtual display
 			// (found on-glass, .136). Every orthogonal axis has to be listed.
 			capture_monitor: draft.capture_monitor ?? null,
 		});
 	// A custom card is "current" when the in-force policy is a Custom one whose fields + game-session
@@ -0,0 +1,160 @@
 import { useQueryClient } from "@tanstack/react-query";
 import { toast } from "@unom/ui/toast";
 import type { FC } from "react";
 import { ApiError } from "@/api/fetcher";
 import {
 	getGetDisplayMonitorsQueryKey,
 	getGetDisplaySettingsQueryKey,
 	useGetDisplayMonitors,
 	useGetDisplaySettings,
 	useSetDisplaySettings,
 } from "@/api/gen/display/display";
 import type { ApiMonitorInfo } from "@/api/gen/model";
 import { Badge } from "@/components/ui/badge";
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 import { QueryState } from "@/components/query-state";
 import { cn } from "@/lib/utils";
 import { m } from "@/paraglide/messages";
 /**
 * **Streamed screen** (design/per-monitor-portal-capture.md §5.3): stream one of the host's real
 * monitors instead of creating a virtual display per client.
 *
 * Deliberately a HOST-wide choice, not per-client — it is the decision of record for this feature,
 * and it is also what keeps input honest: the injector is host-lifetime and shared by every
 * concurrent session, so "which screen do absolute coordinates land on" can only have one answer.
 *
 * Saves on selection (like the policy card above) — there is no Save button to miss. The pin is a
 * field of the display policy, so it rides the same PUT.
 */
 export const MonitorCard: FC = () => {
 	const qc = useQueryClient();
 	const monitors = useGetDisplayMonitors();
 	const settings = useGetDisplaySettings();
 	const save = useSetDisplaySettings();
 	const policy = settings.data?.settings;
 	const rows = monitors.data?.monitors ?? [];
 	// The host reports the EFFECTIVE pin — an env-pinned appliance shows its real answer here even
 	// though the console cannot change it.
 	const pinned = monitors.data?.pinned ?? null;
 	// `PUNKTFUNK_CAPTURE_MONITOR` outranks the stored policy, so a host pinned in its unit's
 	// environment is read-only here: offering controls that silently lose to the env would be worse
 	// than saying so.
 	const envLocked = !!pinned && policy?.capture_monitor !== pinned;
 	const choose = (connector: string | null) => {
 		if (!policy || envLocked) return;
 		save.mutate(
 			{ data: { ...policy, capture_monitor: connector } },
 			{
 				onSuccess: () => {
 					qc.invalidateQueries({ queryKey: getGetDisplaySettingsQueryKey() });
 					qc.invalidateQueries({ queryKey: getGetDisplayMonitorsQueryKey() });
 					toast.success(m.display_monitor_saved());
 				},
 			},
 		);
 	};
 	const busy = save.isPending;
 	const error = save.error instanceof ApiError ? save.error.message : undefined;
 	const row = (
 		key: string,
 		selected: boolean,
 		title: string,
 		hint: string,
 		tags?: ReturnType<typeof Badge>[],
 		onSelect?: () => void,
 	) => (
 		<button
 			key={key}
 			type="button"
 			disabled={busy || envLocked || !onSelect}
 			onClick={onSelect}
 			aria-pressed={selected}
 			className={cn(
 				"flex w-full items-start justify-between gap-4 rounded-md border p-3 text-left transition-colors",
 				selected ? "border-primary bg-primary/5" : "hover:bg-muted/50",
 				(busy || envLocked) && "cursor-not-allowed opacity-60",
 			)}
 		>
 			<span className="flex flex-col gap-1">
 				<span className="flex items-center gap-2 font-medium">
 					{title}
 					{tags}
 				</span>
 				<span className="text-sm text-muted-foreground">{hint}</span>
 			</span>
 		</button>
 	);
 	const monitorRow = (mon: ApiMonitorInfo) => {
 		const tags = [
 			mon.primary ? (
 				<Badge key="p" variant="secondary">
 					{m.display_monitor_primary()}
 				</Badge>
 			) : null,
 			!mon.enabled ? (
 				<Badge key="d" variant="outline">
 					{m.display_monitor_disabled()}
 				</Badge>
 			) : null,
 		].filter(Boolean) as ReturnType<typeof Badge>[];
 		return row(
 			mon.connector,
 			pinned?.toLowerCase() === mon.connector.toLowerCase(),
 			`${mon.connector} — ${mon.description}`,
 			`${mon.mode} · ${m.display_monitor_mirror_hint()}`,
 			tags,
 			// A disabled head cannot be streamed (the host refuses with that reason), so don't
 			// offer it as a choice — it is listed so "why isn't it here?" has an answer.
 			mon.enabled && !mon.managed ? () => choose(mon.connector) : undefined,
 		);
 	};
 	return (
 		<Card>
 			<CardHeader>
 				<CardTitle>{m.display_monitor_title()}</CardTitle>
 			</CardHeader>
 			<CardContent className="space-y-4">
 				<p className="max-w-prose text-sm text-muted-foreground">
 					{m.display_monitor_intro()}
 				</p>
 				{envLocked && (
 					<p className="text-sm text-amber-600 dark:text-amber-500">
 						{m.display_monitor_env_locked()}
 					</p>
 				)}
 				<QueryState
 					isLoading={monitors.isLoading}
 					error={monitors.error}
 					refetch={monitors.refetch}
 				>
 					<div className="flex flex-col gap-2">
 						{row(
 							"__virtual__",
 							!pinned,
 							m.display_monitor_virtual(),
 							m.display_monitor_virtual_hint(),
 							undefined,
 							() => choose(null),
 						)}
 						{rows.map(monitorRow)}
 						{rows.length === 0 && (
 							<p className="text-sm text-muted-foreground">
 								{monitors.data?.error
 									? m.display_monitor_unavailable()
 									: m.display_monitor_none()}
 							</p>
 						)}
 					</div>
 				</QueryState>
 				{error && <p className="text-sm text-destructive">{error}</p>}
 			</CardContent>
 		</Card>
 	);
 };
@@ -3,6 +3,7 @@ import type { FC } from "react";
 import { useLocale } from "@/lib/i18n";
 import { m } from "@/paraglide/messages";
 import { DisplaySection } from "./DisplayCard";
 import { MonitorCard } from "./MonitorCard";
 import { SessionGameCard } from "./SessionGameCard";
 /**
@@ -21,6 +22,7 @@ export const SectionDisplays: FC = () => {
 			<div className="flex flex-col gap-card">
 				<h1 className="text-2xl font-semibold">{m.nav_displays()}</h1>
 				<DisplaySection />
 				<MonitorCard />
 				<SessionGameCard />
 			</div>
 		</Section>