test: add 74 new tests across 5 files, fix stale opus-4-6 assertion

fix: heartbeat monitor data pipeline — 4 bugs resolved

test: add comprehensive test suite with 212 XCTests

docs: add CLAUDE.md with project context for Claude Code

v1.1.0: OpenClaw 2026.2.13+ compatibility — optional totalTokens, refactored fetchModels, updated MemorySearchHit schema, removed Talk Mode

perf: pre-warm TTS WebSocket on init, skip wait if connected, decode every 2 chunks

fix: Edge TTS WebSocket connection failures

fix: remove ping-based connection check that crashed TTS server, add retry logic

fix: wait for WebSocket connection before streaming TTS, fix connection race causing fallback to NSSpeechSynthesizer

feat: streaming TTS playback - schedule PCM buffers incrementally as MP3 chunks arrive

fix: revert engine format caching that broke playback, keep prefetch + direct continuation resume

perf: keep audio engine running between sentences, remove MainActor hop from completion handler

perf: prefetch next TTS sentence while current is playing — eliminates inter-sentence delay

fix: suppress VAD during TTS playback to prevent echo-triggered queue kill

fix: TTS server port conflict — use 8766, fix double-launch, bind IPv4 only, add stderr logging