Adds the persistent-deadline layer on top of the Phase A schema:
Backend (Go)
- internal/services/frist_service.go: CRUD + bulk import + summary
counts, all gated through AkteService.GetByID for office-scoped
visibility. Every mutation writes an akten_events row.
- internal/handlers/fristen.go: GET/POST/PATCH/DELETE for /api/fristen,
/api/fristen/{id}, /api/fristen/{id}/complete, /api/fristen/summary,
/api/akten/{id}/fristen, /api/akten/{id}/fristen/bulk.
- internal/handlers/fristen_pages.go: serves the four new HTML pages.
- Models: Frist + FristWithAkte (joined for the list page).
- Service wired into cmd/server/main.go.
Frontend (Bun TSX + per-page client TS)
- /fristen — list with traffic-light summary cards (red/amber/
green), status + Akte filters, inline mark-complete.
- /fristen/neu — create form (Akte select, due date, optional rule
+ notes); /akten/{id}/fristen/neu pre-selects.
- /fristen/{id} — detail with inline edit, complete, role-gated delete.
- /fristen/kalender — month grid with deadline dots + day popup.
- Akten detail "Fristen" tab now shows the real list (Phase D
placeholder removed).
- Fristenrechner: "Als Frist(en) speichern" CTA opens a modal that
picks an Akte + which calculated rows to import (POSTs to /bulk).
- Sidebar: activates the Fristen entry (was greyed-out in Phase D).
- DE/EN i18n for all new copy.
- Traffic-light + calendar styles in global.css.
Visibility, audit and role-gating reuse the Phase B/D primitives —
no new RLS or auth surface.
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