# 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 Test — stream actions don't
  exist here.** The account zone IS present (2026-09-23 correction, creator
  "why do you make the youtube user icon go away?"): the avatar / Sign In are
  **world-independent**, keeping the right column — and the bar height — pinned.
- **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).