fix: stabilize all test suites after v14 breaking changes

[oliverlaz]

Summary

• Fix all 67 failing test suites (506 tests) caused by v14 breaking changes
• Resolve circular dependency chains in MessageComposer barrel imports
• Add missing React imports and restore lost Preview prop on ChannelListItem
• Add JSDoc warning to useDebouncedTypingActive about user?.id requirement
• Upgrade EventEmitterMock and MediaRecorderMock to support realistic event dispatch

Test plan

• yarn jest --watchAll=false --no-coverage --testPathPattern="src/" — 142/142 suites pass, 1977/1977 tests green, 0 skipped
• yarn lint-fix passes (all lint errors resolved)
• yarn types — verify TypeScript still compiles
• yarn build — verify production build

Categories of test fixes

Category	Suites	Changes
Missing DialogManager context	~10	Added <Chat> or <DialogManagerProvider> wrappers
Avatar prop renames	~15	image→imageUrl, name→userName, added size
Component renames	~10	ReactionsList→MessageReactions, MessageDeleted→MessageDeletedBubble, etc.
Removed context fields	~8	Removed editing, updated handleDelete signature, cooldown API migration
Stale snapshots	~25	Regenerated .snap files, replaced inline snapshots with structural assertions
Missing mocks	~10	Added useChatViewContext, useThreadContext, deleteDraft mocks
Behavioral changes	~5	Mobile nav viewport check, action renames, mention UI changes
AudioRecorder integration	2	Rewrote upload/submit tests to use UI interactions instead of capturing controller from context; upgraded EventEmitterMock to store/dispatch events and MediaRecorderMock to simulate stop()→dataavailable flow

Production code changes

File	Change
Dialog/Alert.tsx, MessageComposer/QuotedMessageIndicator.tsx	Added missing import React
~14 files across MediaRecorder, TextareaComposer, Poll, Location	Barrel → direct imports to break circular deps
ChannelListItem/ChannelListItem.tsx	Restored Preview prop lost during rename
TypingIndicator/hooks/useDebouncedTypingActive.ts	Added JSDoc warning about user?.id requirement

Mock infrastructure improvements

File	Change
mock-builders/browser/EventEmitter.js	Now stores listeners and supports emit() for realistic event dispatch
mock-builders/browser/MediaRecorder.js	Tracks state transitions; autoEmitDataOnStop static flag simulates browser's stop()→dataavailable flow for integration tests

Known follow-up

• Circular dependency root cause: Children of MessageComposer call useMessageComposerController() instead of reading the controller from context — ideally the controller should be exposed via MessageComposerContext

🤖 Generated with Claude Code

[github-actions]

Size Change: +613 B (+0.14%)

Total Size: 441 kB

Filename	Size	Change
./dist/cjs/emojis.js	2.96 kB	+3 B (+0.1%)
./dist/cjs/index.js	237 kB	+606 B (+0.26%)
./dist/WithAudioPlayback-CnG9hoEn.js	0 B	-88.3 kB (removed)	🏆
./dist/WithAudioPlayback-TERIQpZ6.js	88.3 kB	+88.3 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size
./dist/audioProcessing-BbOs2wMd.js	1.32 kB
./dist/cjs/mp3-encoder.js	1.27 kB
./dist/css/index.css	46.5 kB
./dist/css/v2/emoji-mart.css	1.84 kB
./dist/css/v2/emoji-replacement.css	300 B
./dist/css/v2/index.css	39.4 kB
./dist/css/v2/index.layout.css	22.8 kB

_{compressed-size-action}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.26%. Comparing base (73f8767) to head (7735ab4).
⚠️ Report is 142 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3039      +/-   ##
==========================================
+ Coverage   80.05%   80.26%   +0.21%     
==========================================
  Files         511      561      +50     
  Lines       10803    13107    +2304     
  Branches     2711     3417     +706     
==========================================
+ Hits         8648    10520    +1872     
- Misses       1902     1922      +20     
- Partials      253      665     +412     

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