Go deadline engine (internal/calc/):
- 9 proceeding types: UPC (INF/REV/PI/APP), DE (INF/NULL), EPA (OPP/APP/GRANT)
- ~50 deadline rules with durations, parties, rule references
- German federal holiday computation (Easter via Anonymous Gregorian)
- Weekend/holiday adjustment with transparency (original vs adjusted dates)
- 8 unit tests covering holidays, adjustment, and full deadline chains
Frontend (Bun/TSX):
- 3-step wizard: select proceeding → enter date → view timeline
- Visual timeline with party badges, rule references, adjustment warnings
- Print-friendly layout
API: POST /api/tools/fristenrechner (protected, JSON)
GET /api/tools/proceeding-types (protected, JSON)
Route: GET /tools/fristenrechner (protected page)
Home page: Added "Werkzeuge" section with cards linking to both tools
d94f8e7e25