TASK 51 slice 5: webcam Background section in the Layers properties — Remove/Blur PillToggles (radio-exclusive) + Strength slider; strength changes never blank the webcam (new variant inherits the same-effect frame + bitmap). TASK 51 built (Unit: bg-effects UI)

HANDOFF.md

@@ -1,50 +1,47 @@
-# HANDOFF — 2026-10-09 (TASK 51 slice 1 shipped: background-effects engine)
+# HANDOFF — 2026-10-09 (TASK 51 webcam background Remove + Blur — BUILT)
 
 ## Branch
-- main (no feature branch). Pushed through `f8dd107`; the TASK 51 slice-1 commit sits on top,
-  **not pushed** (push at the user's call).
+- main (no feature branch). Pushed through `f8dd107`; everything after is local, **not pushed**
+  (push at the creator's call).
 
-## Dirty files (NOT mine — do NOT commit or co-edit)
+## Dirty files (NOT mine — do NOT commit)
 - The in-flight "pinned chat" work unit: `Models/YouTube.cs`, `ViewModels/MainViewModel.Chat.cs`,
-  `Controls/LeftPanel.xaml`, untracked `Helpers/RelayCommandGeneric.cs`.
+  untracked `Helpers/RelayCommandGeneric.cs`, and **its hunks in `Controls/LeftPanel.xaml`**
+  (lines ~599–610, the chat area). TASK 51 slice 5 edited the SAME file in a different region (the
+  webcam properties, ~line 287); only the TASK 51 hunk was staged (`git apply --cached` of that hunk
+  alone) — the pinned-chat hunks are still unstaged and untouched.
 - The creator's untracked logo art in `Assets/` (`llamacasty text.*`, `llamacasty-text-nobg*.png`,
   `thin logo wordmark.png`).
 
-## What just happened — TASK 51 slice 1 (engine)
-- **Model:** Google's official MediaPipe Selfie Segmenter (landscape, 144×256, Apache-2.0),
-  converted to ONNX by our own `tools/selfie-seg/convert_tflite_to_onnx.py` and **verified against
-  MediaPipe's own runtime** (`verify_against_mediapipe.py`, max |diff| 5e-5). Embedded in the exe
-  (`Assets/Models/selfie_segmenter_landscape.onnx`, 430 KB, in git).
-- **Code:** `Services/BackgroundEffects/` — `IPersonSegmenter` seam, `OnnxPersonSegmenter`
-  (onnxruntime 1.31.0 CPU, never throws), `BackgroundEffectProcessor` (None passthrough, Remove =
-  alpha mask, Blur = passthrough until slice 2). `Models/BackgroundEffect.cs` enum.
-- **Not wired:** nothing calls it yet — no config, UI, or camera hookup. Zero risk to the live path.
-- **Docs:** ai.md (stale "background removal PERMANENTLY OUT" bullet replaced by the reversal + a
-  "Webcam background effects" section + a model-provenance licensing guard), THIRD-PARTY-NOTICES
-  items 11 (ONNX Runtime, MIT) + 12 (MediaPipe model, Apache-2.0 with §4b change note),
-  TASK 51 file + TASKS.md row, Services/Models indexes, MyMistakes conversion recipe.
+## What just happened — TASK 51, all five slices
+1. **Engine** — Google's MediaPipe Selfie Segmenter (landscape, Apache-2.0) converted to ONNX by
+   `tools/selfie-seg/` and verified vs MediaPipe's own runtime; embedded resource; onnxruntime CPU.
+2. **Blur** — background at ¼ res, 3 box passes, mask-blended; Remove gets edge feather.
+3. **Config** — `WebcamSceneConfig.BackgroundEffect` + `BackgroundStrength`, persisted (additive cols).
+4. **Hookup** — `CameraManager` renders per-scene effect **variants** (one segmentation per raw frame
+   on a latest-frame-drop worker; raw path untouched); VM `SyncWebcamEffects()` declares/adopts them.
+   Synthetic 720p Debug: segment 1.6 ms, Remove 3.3 ms, Blur 17.5 ms.
+5. **UI** — Background section in the webcam's Layers properties: Remove / Blur `PillToggle`s,
+   radio-exclusive, + Strength slider (visible while an effect is on).
+Also this session: 64-bit requirement (`PlatformTarget=x64`), GPL-3.0-or-later licensing, README
+rewrite, TASK 55 (disk hygiene) + TASK 56 (secret scan before going public) queued.
 
 ## Tests
-- Full suite **408 passed / 0 failed**, 0 build warnings. New: `BackgroundEffectEngineTests` (Remove
-  integration test with a fake segmenter; bundled-model contract test vs a MediaPipe reference mask,
-  fixtures in `ytLive.Tests/Fixtures/`).
+- Full suite **412 passed / 0 failed**, 0 build warnings. New: `BackgroundEffectEngineTests` (Remove,
+  Blur, bundled-model contract), `CameraManagerTests` (variant reaches compositor + preview, raw
+  stays raw), `LayoutStorePersistenceTests` (per-scene roundtrip + legacy migration),
+  `WebcamBackgroundPillTests` (radio semantics + XAML wiring).
+- Known environment flakes (not regressions): `Mix_HonorsProviderGains…` (fails while system audio
+  plays), `RealMouseDrag…` (needs an idle desktop).
 
 ## Known issues / follow-ups
-- **64-bit only (2026-10-09):** `PlatformTarget=x64` in both csproj files (verified: ytLive.dll PE
-  machine 0x8664, 408/408 green). TASK 48 item 2 carries the x64-only MSIX + `-r win-x64` publish.
-- `onnxruntime.dll` is ~17 MB; an RID-less build copies every RID's native folder — TASK 48's MSIX
-  publish must pin win-x64.
-- **License: GPL-3.0-or-later** (2026-10-09: `LICENSE`, `ADDITIONAL-TERMS.md` with §7 b/c/e, icon +
-  logo all rights reserved, AI-generated backgrounds/alert video = GPL placeholders; both files ship
-  beside the exe). Source offer = `https://llgit.llamachile.tube/gramps/LlamaCasty` (Gitea; the
-  creator toggles it public), in the notices header + README. **Before it goes public: scan git
-  history for secrets.** README rewritten (creator's voice, generic comparison, real build steps).
-  Still stale and NOT yet rewritten: ai.md "Windows packaging" (Store IAP / branding-flash paid
-  delta) and "Monetization" sections, MARCOM.md asset table (`llama-logo.png` doesn't exist).
+- **Creator's real-camera check (TASK 51):** toggle Remove/Blur on a webcam, watch edges/lighting,
+  and read `startup.log` → "background effects avg … ms/frame".
+- `onnxruntime.dll` ~17 MB; TASK 48's MSIX publish must pin `-r win-x64` (x64-only already enforced).
+- Still stale, not rewritten: ai.md "Windows packaging" (Store IAP / branding-flash paid delta) and
+  "Monetization" sections; MARCOM.md asset table (`llama-logo.png` doesn't exist).
+- TASK 56: secret-scan the full history BEFORE the Gitea repo (`gramps/LlamaCasty`) goes public.
 - Carried: "Use default background" toggle still not working (from 2026-10-07).
 
 ## Next step
-- TASK 51 slice 2: **Blur** in `BackgroundEffectProcessor` (separable box/gaussian, strength), one
-  integration test. Then slice 3 config + persistence (`BackgroundEffect` + `Strength`), slice 4
-  camera-path hookup + perf check on the creator's box, slice 5 UI: radio-exclusive Remove/Blur pill
-  switches + strength slider in the webcam's Layers properties.
+- Creator runs the app: webcam → Layers properties → Background → Remove / Blur + Strength.