feat(ui): TASK 42 top bar redesign — one Record-or-Stream surface (2026-09-22)

The bar now renders ONE surface from the FIRST decision the creator makes —
Record or Stream — with each world being the whole bar. Creator directive:
"I wrote the fucking thing and I still can't figure-out how to do stuff",
"forget this one dog plan bullshit". OBS/streaming-tool reference for the
one-surface paradigm: https://obsproject.com (single mode toggle + context
actions) — cited per spin-guard habit; the go-live/test pattern follows
CEV (https://cev-desktop.aSean.xyz) precedent.

- Mode: single segmented REC|ON-AIR switch (SegmentToggle/SegmentLabel in
  Themes/Controls.xaml); radio-exclusive world selection, one tap to flip.
- Record world: switch + Start Recording, zero YouTube identity.
- Stream world: switch + Go Live + Test + account zone right (Sign In until
  connected, then avatar with Change Account/Logout context menu).
- Test is a child of Stream: procs only stream-armed AND signed-in.
- Running: one reality line "dot word elapsed" (REC/LIVE/TEST; green/red/
  gold) + End; worlds + switch retire.
- Gear moved up from bottom bar, ~3 wordmark letters past the brand, single
  click opens Settings/Bug/Feature/About menu (TASK 40 Unit B shipped early).
- Fix folded in: BeginTestStream now arms OnAirPillOn explicitly (unarmed
  pump booted with zero encoder outputs -> "At least one output is required"
  forced-stop cascade from TASK 41's pipeline).
- VM: world/reality props + RaiseTopBarModes() wired into StreamStatus,
  pill, IsRecording, IsTestStream, IsConnected setters.

Doc: ai.md top-bar model, ViewModels/index.md, Controls/index.md, TASKS.md,
HANDOFF.md, new TASKS/task-42-top-bar-redesign.md; task-40 note.

Tests: TopBarModeTests.cs (new Good Dog), PillRadioTests + TestStreamTests
gates updated. Build 0 warnings; full suite 314/315 — single abort is the
pre-existing env-dependent RealMouseDrag test (Path of Exile 2 running)

TASKS/task-40-app-settings-round.md

@@ -91,12 +91,21 @@ drives `CameraConfigViewModel` — Auto + slider changes forward to the probe.
 
 ## Unit B — gear to top-left (your ask 2)
 
+> ✅ **SHIPPED 2026-09-22** as part of TASK 42 (top bar redesign) — gear is top-right
+> of the brand on `Controls/TopBar.xaml`, single click opens the Settings/Bug/Feature/
+> About menu (`GearButton_Click` moved from BottomBar). See
+> [`task-42-top-bar-redesign.md`](task-42-top-bar-redesign.md).
+
 - `Controls/TopBar.xaml`: `IconButton` gear **right of the brand Button**, gap ≈ 3 wordmark
   letters; left-click `OpenSettingsCommand`; ContextMenu keeps Report Bug / Feature
   Request / About. Remove the gear (+ its click handler) from `Controls/BottomBar.xaml(.cs)`.
 - Bonus: TopBar sits inside the overlay scrim span (`OverlayHost Grid.RowSpan=3` covers rows
   0–2), so the gear is correctly covered while an overlay is open — today it sits below the scrim.
 
+> **Left as follow-ups** (not part of the shipped gear): the overlay scrim row-span bonus (still
+> open) — the new gear sits in `OverlayHost`'s Row 0 but the scrim rows are not yet spanned over
+> it. Revisit when rows are next touched.
+
 ## Unit C — the small defaults (your ask 3, rest)
 
 - **Default output resolution** — persist `SelectedQuality` (e.g. Settings key

TASKS/task-42-top-bar-redesign.md

@@ -0,0 +1,71 @@
+# TASK 42 — Top bar redesign (shipped 2026-09-22)
+
+> One work unit, no sub-tasks (creator directive: "forget this one dog plan bullshit.
+> Our one plan is replacing the top menu bar with something usable"). Good Dog =
+> ONE integration test: `ytLive.Tests/TopBarModeTests.cs`.
+
+## The problem
+
+The old bar packed three widget grammars (sliding pills = intent, dots/badges =
+state, buttons = action), a hidden sign-in context menu, an account status dot
+that collided with live red, six simultaneous "you're running" signals, and a
+dead pieces (PRIVATE chip — dev-phase forced option, becomes real at ship; status
+light whose pulsing spec never shipped). The creator: "I wrote the fucking thing
+and I still can't figure-out how to do stuff."
+
+## The product model (locked in conversation)
+
+The bar is **ONE surface rendered by the FIRST decision — Record or Stream** — each
+world is the whole bar; the other world never exists on screen.
+
+- **Mode switch:** one segmented **REC|ON-AIR** toggle (former two pills are a
+  binary, radio-exclusive decision). Going back = one tap on the other segment.
+  Idle-only; while running the switch retires.
+- **Record world:** `switch + Start Recording`. **No YouTube identity at all.**
+- **Stream world:** `switch + Go Live + Test` and the **account zone** on the right
+  (Sign In while signed-out — the pending sequence step rendered exactly when
+  needed; the avatar once connected, right-click = Change Account/Logout).
+- **Test is a child of Stream** (creator ruling): it procs only when ON-AIR is
+  armed AND signed in — you can't dry-run a recording.
+- **Running:** the worlds retire; one reality line `● REC|LIVE|TEST 00:12:34`
+  (green/red/gold) + End. Full-bar color flip stays.
+- **Gear** moved up from the bottom bar to ~3 wordmark-letters past the brand
+  (task 40 Unit B spec): one menu — App Settings / Report Bug / Feature Request /
+  About. Removed from `BottomBar`.
+- **Sign-in flow:** Stream → (Sign In appears, or avatar confirms the account) →
+  Go Live → Stop. Account switch = one re-auth → Google's own chooser pre-selected
+  (no accounts-list API exists; `login_hint`+`select_account` is the source of truth).
+
+## Files (declared scope)
+
+- `Themes/Controls.xaml` — `SegmentToggle` / `SegmentLabel` (segmented switch)
+- `Controls/TopBar.xaml(.cs)` — full rewrite; `GearButton_Click` moved in
+- `Controls/BottomBar.xaml(.cs)` — gear removed
+- `ViewModels/MainViewModel.Streaming.cs` — world/reality props +
+  `RaiseTopBarModes()` (called from StreamStatus/IsRecording/IsTestStream/pill
+  setters); `PrimaryStartButtonLabel` = "Start Recording"/"Go Live";
+  `ShowTestButton`/`CanStartTest` = stream world AND connected
+- `ViewModels/MainViewModel.Streaming.Operations.cs` — `BeginTestStream` arms
+  `OnAirPillOn` explicitly (the TASK 41 pipeline bug: a test that never armed the
+  pill booted a pump with zero encoder outputs → "At least one output is required")
+- `ViewModels/MainViewModel.Account.cs` — `IsConnected` raises `RaiseTopBarModes()`
+- `ytLive.Tests/PillRadioTests.cs` / `TestStreamTests.cs` — updated to the new
+  gates (label + middle-mover + Test-on-Stream)
+- `ytLive.Tests/TopBarModeTests.cs` — NEW Good Dog
+- Docs: ai.md, ViewModels/index.md, Controls/index.md, TASKS.md, HANDOFF.md
+
+## Build / test
+
+Main + tests build clean, 0 warnings; **full-suite run: 314/315 pass** — the single abort is the
+known environment-dependent `LayerReorderPersistenceTests.RealMouseDrag` (Path of Exile 2 was open;
+its injected physical mouse events no-op when a game window interferes — documented in the test's own
+docstring). 314 prior tests + the new Good Dog, all green; the drag test passes on a clean desktop.
+Test environment note: a dev machine may hold a real saved OAuth
+session that loads synchronously in the ctor — signed-in-world assertions must
+force `IsConnected` first (the record of that trap lives here and in the tests).
+
+## Not in this task (carried)
+
+- App Settings round (TASK 40) — camera picker, defaults, accent units still queued;
+  its Unit B (gear) is now DONE early by this task; BottomBar gear already removed.
+- Account-confirm via Google chooser is behavior folded into Sign In (no new code).