FCE-3852 Publish device toggled on while joining

[Magmusacy]

Description

A device turned on with toggleMicrophone() / toggleCamera() while joinRoom() is in progress is now published once the peer joins.

• usePeerStatus also returns getLatestPeerStatus(), read from a ref updated in the client event handlers (ahead of the re-render).
• toggleDevice re-reads the published track id and the latest peer status after startDevice() resolves, then publishes or resumes the track.
• Joining with a device already running is unchanged: the joined handler still publishes it, once.

Motivation and Context

If joined fired while getUserMedia was pending, nothing published the device:

• the joined handler skipped it, because the device did not exist yet;
• toggleDevice still saw "connecting" and no track id, both read before the await.

The device ran locally (isMicrophoneOn: true), but the room got no track.

Checked:

• toggleDuringJoin.spec.ts: 3 tests fail before the fix, all 6 pass after.
• On an Android emulator against a sandbox room: before, only video was published; after, audio was published once the microphone started, then video.

Documentation impact

• Documentation update required
• Documentation updated in another PR
• No documentation update required

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)

[linear]

FCE-3852

[Copilot]

🟡 Changes recommended

Two new tests fail strict TypeScript definite-assignment checking.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

Fixes device publication when camera or microphone activation completes during room joining.

Changes:

• Adds synchronous access to the latest peer status.
• Rechecks publication state after device startup.
• Adds race-condition regression tests.

File summaries

File	Description
packages/react-client/src/tests/toggleDuringJoin.spec.ts	Tests device toggling across join timing scenarios.
packages/react-client/src/hooks/internal/useTrackManager.ts	Publishes or resumes tracks using current state.
packages/react-client/src/hooks/internal/usePeerStatus.ts	Tracks status in a ref for immediate reads.
packages/react-client/src/FishjamProvider.tsx	Supplies the status getter to track managers.

Review details

Suppressed comments (1)

packages/react-client/src/tests/toggleDuringJoin.spec.ts:50

• This second callback-assigned promise has the same strict-mode definite-assignment error when it is later awaited. Mark it as definitely assigned (or initialize it) so tsc --noEmit succeeds.

    let toggle: Promise<unknown>;

• Files reviewed: 4/4 changed files
• Comments generated: 1
• Review effort level: Balanced

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