feat(host/windows): Steam library auto-discovery on Windows

The Steam `LibraryProvider` keyed off `$HOME` + Linux paths, so the game library was empty on Windows. Add Windows discovery: the default Steam install dirs under Program Files (`ProgramFiles(x86)`/`ProgramFiles`/ `ProgramW6432`), with games on other drives picked up via each root's `libraryfolders.vdf` — whose Windows values are backslash-escaped, so unescape `\\` → `\`. The existing root-scan/dedup logic is shared via a new `steam_roots_existing` helper. The custom store (mgmt JSON CRUD) was already cross-platform; only Steam auto-discovery was Linux-only. Not yet covered: a non-default Steam install dir (the registry `Valve\Steam\InstallPath`). Degrades gracefully — no Steam → empty list. clippy -D warnings + library tests green on Windows and Linux. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-15 07:59:21 +00:00
parent 66f579461f
commit 2bca89c555
2 changed files with 33 additions and 3 deletions
@@ -31,6 +31,7 @@ Every OS-touching backend is implemented behind the existing traits and **builds
 | Host→client audio wiring | ✅ done | builds on MSVC; `m3` `audio_thread` active on Windows (silent VM → no samples to send) |
 | GameStream (Moonlight) audio | ✅ done | stereo path active on Windows (WASAPI→Opus→RTP/FEC); surround stays Linux-only (libopus multistream / `audiopus_sys`) |
 | Rumble back-channel (ViGEm) | ✅ done | `request_notification` → background thread → 0xCA; live needs a physical pad |
+| Game library (Steam discovery) | ✅ done | Windows Steam roots (Program Files) + VDF other-drive libraries; custom store already cross-platform. Non-default Steam install dir (registry) not yet covered |

 **Remaining for full parity:**
 - **Live GPU/in-session validation** — SudoVDA monitor activation, DXGI capture, NVENC encode,