Broadcast Text pull-out (Live screen) + launch geometry 1920x1040/1366x768 with restore

ai.md

@@ -161,6 +161,7 @@ The AI hallucinated through multiple commits tonight on background/scene propert
   - TASK 10: Polar billing — license key entry, offline entitlement, brand flash gating, Velopack auto-updates
   - TASK 19/23 merged: Control Surface UX — director's control room, transitions (Cut/Fade/Move), thumbnails above central monitor, edit mode offline only, right panel eliminated
   - TASK 20: Hotkeys (global keyboard shortcuts) — the single biggest UX gap
+  - Broadcast metadata pull-out + launch geometry — shipped 2026-08-24 ("Text" tab on the Live screen, see its section below)
   - TASK 21: Media source (video file playback) — starting soon videos, BRB loops
   - TASK 22: Audio sync offset — lip-sync correction for USB mics/capture cards
   - These were identified through competitive analysis and are table-stakes for any streaming software in 2025-2026. Full details in `TASKS.md`.
@@ -192,6 +193,22 @@ The app is a **director's control surface**, not an editor. This replaces the OB
 - `MainViewModel.HandleHotkey` maps ids to `TransitionToScene`/start-end commands (honoring `CanExecute`)/mute toggles/`TraxLeftClick`.
 - Tests: `RegistrarOverride` static seam mirrors `LayoutPathOverride`. **Landmine:** forcing a WPF window's handle with `WindowInteropHelper.Handle` does NOT raise `SourceInitialized` and returns Zero pre-show — use `EnsureHandle()` in tests; it both creates the HWND and fires the event.
 
+### Broadcast metadata pull-out + launch geometry (2026-08-24)
+
+**The "Text" tab** (Live screen only): a white 30px tab with rotated YouTube-red "Text" sits on the right edge of the preview, vertically centered, visible only while `IsLive` (`IsBroadcastMetadataVisible`). Click slides out a 320px dark drawer over the preview's right edge (200ms CubicEase on `Width`, `BroadcastForm.IsDrawerOpen` drives it; ✕ closes).
+
+**Fields — the always-editable snippet/status set** (⚠️ creator premise inverted: contentDetails fields like latency/DVR/embed are editable ONLY in created/ready, NOT while live; they are deliberately absent):
+- Title / Description / Tags (comma-separated string → `snippet.tags[]`) / Visibility ComboBox (private/unlisted/public) / Made-for-Kids CheckBox — all live-editable pre- and post-launch
+- Scheduled Start is read-only ("set at Go Live")
+
+**Plumbing:** `Models/BroadcastMetadata` POCO; `Services/LiveBroadcastFormViewModel` (owns field state, persists every edit to Settings keys `Broadcast.*` immediately via `Func<LayoutStore>` seam — survives layout re-pointing; owns drawer state; `UpdateBroadcastCommand` gated by `CurrentBroadcastId != null && !IsUpdating`). `YouTubeStreamService.UpdateBroadcast` PUTs `liveBroadcasts?part=snippet,status` and **must echo scheduledStartTime — update replaces the whole snippet part**, omitting it clears the schedule. Go Live prefills the dialog from the form (`BroadcastForm.Title/Description`) and calls `CaptureGoLive(title, description, now)` on confirm. `MainViewModel.CurrentBroadcastId` exposes the private `_currentBroadcastId`; notified on create/end.
+
+**The old Default Stream Title/Description** (un-persisted, App Settings overlay) are DELETED — the form owns those fields end-to-end; Go Live prefill routes through it.
+
+**Launch geometry:** default **1920×1040**, MinWidth **1366**, MinHeight **768**, `WindowStartupLocation=Manual`. Window size/position persist on close via `RestoreBounds` (+ WindowState Normal/Maximized; Minimized treated as Normal) into Settings keys `Window.*`; restored in the MainWindow ctor BEFORE show, clamped to the minimums and the primary `SystemParameters.WorkArea` (a position saved on a since-disconnected secondary monitor falls back on-screen). Multi-monitor restore is not supported yet.
+
+Test seam note: `YouTubeAuthService.SetSession()` is public — tests inject a channel with future `TokenExpiry` so `EnsureToken()` passes offline; pair with an `HttpClient(new StubHandler())`.
+
 ### Screen backdrop capture (TASK 3 ship task #1) — model reworked by TASK 25
 
 **The Background is a locked per-screen layer (TASK 25): exactly one per canonical