Branding flash monetization: full-frame 'made with ytLlive!' every 300s replaces the always-on watermark

TASKS.md

@@ -139,7 +139,12 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
 4. **Chat box** — rendered from the live chat poll (right panel is the same feed, raw)
 5. **Scene compositing** — per-scene source layering (z-order = sources list order, top-to-bottom
    back-to-front), preview rendered via D3DImage or MediaElement
-6. **Drag/drop placement & reorder** — intuitive, visual (per design principle):
+6. **Branding flash** — the topmost full-frame "made with ytLlive!" layer at ~25% opacity, ~1s on /
+   300s off (see Monetization in `ai.md`), gated on `BrandFlashEnabled` + live/recording. Lives in the
+   preview compositor now (`BrandFlashLayer` in `MainWindow.xaml` CanvasGrid, driven by
+   `BrandFlashActive`/`BrandFlashTimer` in `MainViewModel`); the encoder output renders the same layer,
+   and v0.2 local recordings carry it too
+7. **Drag/drop placement & reorder** — intuitive, visual (per design principle):
    - **Preview:** click-drag a source in the center panel to reposition it; resize via handles
    - **Scenes list:** drag rows to reorder scenes
    - **Sources list:** drag rows to reorder sources (this *is* the z-order) — implemented
@@ -231,6 +236,6 @@ Preview shows the transition too (WYSIWYG). No wipes/slides/LUTs beyond the four
 
 ## Backlog (future versions)
 
-- v0.2 — Recording to local file
+- v0.2 — Recording to local file (recordings carry the branding flash — see TASK 3 / `ai.md` Monetization)
 - v0.3 — Stream scheduling
 - v0.4 — Multi-destination restreaming