Merge origin/main (shared clipboard Phase 1) into the local W6.2 + rumble-D line

Reconciles the two diverged mains: the local stack (W6.1/W6.2 crate decomposition,
lid-closed fixes, ABR climb gating, rumble root-fix A-D incl. the W7 core module
splits) x origin/main (clipboard wire ABI v8 + pf-clipboard + the macOS client).

Textual conflicts were trivial (host Cargo.toml dep union; Cargo.lock + the
cbindgen header regenerate). The real work was structural: the local line's W7
splits dissolved the two files the clipboard's Phase 0 landed in, so the merge
left both layouts side by side. Resolved by re-homing the clipboard delta into
the split layout and deleting the stale flat files:

- quic/msgs.rs -> quic/clip.rs (the 0x40-0x44 messages, CLIP_* vocabulary,
  codecs) + HOST_CAP_CLIPBOARD into quic/caps.rs beside GAMEPAD_STATE; mod.rs
  declares clip and fixes the split-by-concern doc.
- client.rs -> the client/ split: CtrlRequest clip variants + Negotiated.host_caps
  (control.rs), CLIP_EVENT_QUEUE (planes.rs), clip channel ends (worker.rs),
  NativeClient clip surface + channels (mod.rs), control-task encode/decode arms +
  the clipboard task spawn (pump.rs).

Verified on macOS: core 174/174 (merged rumble + clipboard suites), pf-clipboard
clippy -D warnings clean, fmt applied, header regenerated. Host-side compile
rides the Linux/Windows legs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -2798,6 +2798,23 @@ dependencies = [
  "windows 0.62.2 (git+https://github.com/microsoft/windows-rs?rev=a4f7b2cb7c63c6bb7fc77a2affe57145be1d8c4f)",
 ]
 
+[[package]]
+name = "pf-clipboard"
+version = "0.12.0"
+dependencies = [
+ "anyhow",
+ "ashpd",
+ "futures-util",
+ "libc",
+ "punktfunk-core",
+ "quinn",
+ "tokio",
+ "tracing",
+ "wayland-client",
+ "wayland-protocols",
+ "windows 0.62.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "pf-console-ui"
 version = "0.12.0"
@@ -3282,6 +3299,7 @@ dependencies = [
  "opus",
  "parking_lot",
  "pf-capture",
+ "pf-clipboard",
  "pf-driver-proto",
  "pf-encode",
  "pf-frame",