docs(wiki): sync from docs/wiki/ @ 8a71a44
docs(wiki): sync from docs/wiki/ @ a58b2c6
docs(wiki): sync from docs/wiki/ @ 8792560
Populate wiki with comprehensive documentation - Home.md: Navigation and quick start guide - Architecture.md: Project structure and key modules - Services.md: Service layer responsibilities - Development-Guide.md: Setup, commands, troubleshooting - Testing-Guide.md: Jest patterns, mocking, CI - Sync-Engine.md: Git sync and conflict resolution - AI-Integration.md: Vercel AI SDK, providers, tokens - AI-Providers.md: Provider types and Anthropic defaults - i18n.md: Localization setup (6 languages) - Theme-Styling.md: NativeWind v5, dark mode - Filter-Persistence.md: Async storage for filters