Add agent knowledge files for all modules

apps/clock/.agent/memory.md

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+# Clock App - Memory
+
+Auto-updated with learnings from code changes.
+
+## Recent Updates
+*No updates yet.*
+
+## Known Issues
+*None documented.*
+
+## Implementation Notes
+- Backend runs on port 3017
+- Database: PostgreSQL with Drizzle ORM
+- Auth: Mana Core Auth (JWT EdDSA)
+- Time storage: UTC in database, convert to user timezone on frontend
+- Sync features: Alarms, Timers, World Clocks, Presets
+- Local-only features: Stopwatch, Pomodoro (no backend sync)
+- Clock faces: 20+ customizable designs
+- Life clock: Visualization of time/life progress
+- i18n: Support for DE, EN, FR, ES, IT
+- Theme: Amber/Orange (#f59e0b) as primary color
+
+## Clock Face Types
+- Classic, Modern, Minimalist, Elegant, Retro
+- LCD, Flip, Binary, Matrix, Neon
+- Railway, Nautical, Industrial, Vintage
+- Gradient, Bauhaus, Radar, Sporty, Typewriter, Terminal
+
+## Database Schema Notes
+- `alarms.time`: Stored as TIME type (HH:MM:SS)
+- `alarms.repeat_days`: Array of integers [0-6] for weekdays
+- `timers.status`: Enum (idle, running, paused, finished)
+- `world_clocks.sort_order`: User-controlled display order
+- `presets.settings`: JSONB for flexible configuration