feat: make setup wizard safe for re-runs with atomic config updates

docs: update README with Windows support, background task context, and Node 24

feat: give background task agents full context and harden proactive escalation

feat: add Windows compatibility and cross-platform support

fix: bump better-sqlite3 from v11 to v12.8.0 for Node.js 24 support

feat: add multi-provider TTS with Kokoro daemon support

fix: enforce security gate before auto-reply commands

fix: silently drop unauthorized messages instead of responding

feat: add local whisper-cpp transcription provider for voice messages

feat: enhance skill-creator with full docs and add skill system to self-learning rules

fix: add SSRF protection to browser navigate action

feat: add external MCP server support with self-management tools

fix: add retry/fallback resilience for all channel adapters

feat: wire message pipeline to heartbeat retry queue for failed sends

fix: prevent silent message loss for schedule-injected and failed-reply messages