the ai is an overthinking fucking moron who needs it's plug pulled until such time it can repeat a similar action with its head and ass

HANDOFF.md

@@ -1,7 +1,7 @@
 # HANDOFF — Session State
 
 ## Branch
-`main` — clean at `4b9a8e5` (Control Surface UX: pill toggle, background rename, per-scene properties).
+`main` — clean, 0 warnings.
 
 ## What shipped this session
 
@@ -13,21 +13,31 @@
 6. **Sliding pill toggle** — green ON (#22c55e) / red OFF (#ef4444), replaces checkbox
 7. **Backdrop → Background** — full C# rename, SQL column rename with migration, asset files renamed, `Source.IsBackground` `new` → `override` fix, legacy "Backdrop" display name migration
 8. **Geometry mismatch error** — red text when custom background aspect ratio >5% off 16:9
-9. **Per-scene background properties** — pill toggle + custom path persist per-scene via Settings table
+9. **Per-scene background properties** — `UseDefaultBackground` + `CustomBackgroundPath` on `SceneElement` (superclass), persisted per-source via `BackgroundPath_{sourceId}` / `BackgroundUseDefault_{sourceId}` in Settings table
+10. **All five scenes have backgrounds** — `SceneCatalog.HasBackground` returns `true` for all canonical scenes. `EnforceBackgroundPolicy` no longer strips backgrounds from non-Live scenes.
+11. **Pill toggle label** — "Use default background:" TextBlock before toggle
+12. **Pill toggle wiring** — `SelectedElement.PropertyChanged` subscription triggers `UpdateBackgroundImage` + `RefreshSnapshotsAsync` + `ScheduleSave` on `UseDefaultBackground` change
 
-## Background properties (fully shipped)
-- `Scene.UseDefaultBackground` (bool, default true) + `Scene.CustomBackgroundPath` (string?)
-- Persisted as `BackgroundUseDefault_{sceneId}` / `BackgroundPath_{sceneId}` in Settings table
-- Pill toggle ON → loads default asset from DB; OFF → loads custom file path
-- Custom path preserved when toggled back ON (not cleared)
-- Geometry mismatch: aspect ratio check ±5% of 16:9, shows expected 1920×1080
+## Background layer rules
+- Every scene has a Background layer at position 0 — undeletable (trash icon hidden, context menu "Remove Layer" hidden, `RemoveElement` returns early)
+- `IsBackground` is derived from `SourceType.Background` via `Source.Type` setter — impossible to forget
+- All five scenes have default images stored in Asset BLOBs in SQLite
+- First run: pill ON for all five, shipped defaults load
+- Toggle OFF → browse for custom file, FQFN stored
+- On reload: try to load custom file; if missing, fall back to default asset
+- `EnsureDefaultBackground` re-seeds missing backgrounds on scene switch (covers Starting, BRB, Chat, Ending; Live covered by seed methods)
+
+## Current state
+- **0 warnings, 0 errors**
+- **210/211 tests pass** (1 pre-existing AudioPipeline gain-math failure)
+- Deleted backgrounds re-seed automatically via `EnsureDefaultBackground`
 
 ## Build
 ```bash
 taskkill.exe /F /IM ytLive.exe  # if running
 "/mnt/c/Program Files/dotnet/dotnet.exe" build "C:\Users\gramp\Documents\Code\projects\ytLive\ytLive.csproj"
+"/mnt/c/Program Files/dotnet/dotnet.exe" vstest "C:\Users\gramp\Documents\Code\projects\ytLive\ytLive.Tests\bin\Debug\net8.0-windows10.0.19041.0\ytLive.Tests.dll"
 ```
-**0 warnings, 0 errors.**
 
 ## Polar.sh resources
 | Resource | ID |
@@ -42,7 +52,7 @@ taskkill.exe /F /IM ytLive.exe  # if running
 | Key prefix | `LCYT-` |
 
 ## Next steps
-1. **Visual testing** — run on Windows display, verify pill toggle, background properties per-scene
+1. **Visual testing** — run on Windows display, verify backgrounds show for all 5 scenes
 2. **Thumbnail drag-reorder** — reorder scenes via drag on thumbnail strip
 3. **Real snapshot generation** — replace placeholder colors with compositor-rendered thumbnails
 4. **Transition dropdown UI** — add XAML control to pick transition type + duration