# HANDOFF — Session State

## Branch / Commit State

**`main`**, dirty working tree being committed as one unit (web source rendering fix — user-confirmed
working). **NOT pushed — user rule: never push without explicit instruction (2026-08-24).** No feature
branches pre-1.0: all work lands on `main` per work unit.

## The web-source rendering work (2026-08-28) — CURRENT MODEL: stable viewport + content-bounds crop

**Background:** viewport==box made dragging the box reflow the page (truncation, scrollbars,
unrecoverable image, "janky at stressful geometries"). Fixed-viewport + `Uniform` left letterbox
dead space. CSS reset enlarged the gap. Scrollbars were called "super fail". The right/bottom
dead-space + "not anchored at (0,0)" report persisted across every model — dead space was
page-internal (widget content smaller than the viewport), which is now cropped out.

**The model that satisfies invariants (implemented, visual verification pending):**
- `Services/WebView2Manager.cs` — stable viewport = the element's size at `Register` (snapshot,
  never tracked → no reflow/truncation during resize). `overflow:hidden` (html+body) +
  transparent-bg injection on every nav (nothing else). After each navigation,
  `QueryContentBoundsAsync` reads the page's real content rect
  (`scrollWidth/scrollHeight` vs `innerWidth/innerHeight` via `ExecuteScriptAsync` + JSON) and
  `CaptureFrame` **crops the capture to the actual content bounds, anchored at (0,0)** — dead
  space inside the viewport no longer reaches the box. Immediate capture on `NavigationCompleted`.
- `MainWindow.xaml` — web `<Image>` uses `Stretch="Fill"`: the cropped frame maps edge-to-edge,
  so the selection box always bounds the real widget. `FramePump` unchanged.
- Invariants: **page viewport stable; display Fill-crops to content and fills the box.**

**Property panel / sliders (2026-08-28):** web URI ✕ clears the textbox; web ✓/✕ icon buttons
`IsTabStop="False"` so Tab walks X→Y→W→H→URI; Slider style `IsMoveToPointEnabled="True"`
restores click-anywhere-on-bar.

Build: 0 warnings; tests 4/4. Rejected for the record: fixed 1920×1080+`Uniform` (letterbox),
CSS margin/100% reset (enlarged gap), viewport==box (reflow/truncation/scrollbars).

## Key facts / landmines

- **App running locks `ytLive.exe`** → build fails MSB3027 until creator exits the app.
- **Startup diagnostics:** unhandled exceptions + checkpoints go to `%APPDATA%\ytLlive\startup.log`
  (`Helpers/AppLog.cs`). On a silent startup crash, read that.
- **Pre-existing test failures (unrelated to web source, do not chase):**
  `AudioPipelineTests.Mix_HonorsProviderGains_AndGameMute_KillsTheLoopback` +
  `RoundClipInteractionTests.Round_Clip_Corner_Is_Grabbable_And_Shape_Is_Circle`.
- **Real-MainWindow tests MUST set `LayoutPathOverride`** — DB pollution wiped real data once.
- **Good Dog Rule:** ONE integration test per change; no new feature branches pre-1.0.
- **Scope Lock:** declare the file list, run `scripts/scope-check.sh` before every commit.
- **Every feature change ships memory updates in the SAME commit** — `TASKS.md` status + this file.
- No `CODING.md`; conventions live in `AGENTS.md` + `ai.md`.

## Next steps
1. AWAIT creator's verdict on viewport==box (geometry-agnostic) rendering — visual check with a
   widget URL at several box sizes; the selection frame must snap flush with no padding.
2. Follow-up only if the creator asks: graceful handling of navigation errors / invalid URIs (TASK 17 ×9).
3. Continue queue: TASK 18 local recording, TASK 21 media source, TASK 22 audio sync offset.