Update OKF docs bundle, README, and CLAUDE.md for today's features

Documents the shift planning and closure/payroll modules (new tables,
routes, stores), the dark redesign, and the docker-compose-broken-host
workaround. Adds CLAUDE.md pointing agents at docs/. Translates README to
English and keeps host-specific infrastructure details out of the repo.

docs/log.md

@@ -1,5 +1,41 @@
 # Update Log
 
+## 2026-08-16
+- **Creation**: Shift planning module — `shift_slots`/`shift_signups`
+  tables, weekly-template generation (lazy, idempotent, no cron), employee
+  signup/cancel with collision + capacity checks, admin calendar UI
+  (`MonthCalendar`, `ShiftPlanning`, `ShiftPlanManager`). Ported from
+  `gscript/ShiftPlanningService.js`, rewritten against this app's own data
+  model rather than copied.
+- **Creation**: Month closure + payroll module — `pay_rates`,
+  `month_closures`, `payroll` tables; employee confirms the month, admin
+  locks/reopens/marks paid, tips/bonus/other adjustments, CSV export.
+  Collapses the source system's multi-role (ADMIN/MANAGER/ACCOUNTANT)
+  approval chain down to fit this app's single-admin reality. Ported from
+  `gscript/ClosureService.js` + `gscript/PayrollService.js`.
+- **Fix**: A shift left open more than 12h (forgotten clock-out) is now
+  auto-closed at `clock_in + 12h`, checked lazily on read
+  (`attendance.ts`) — no admin action or scheduler needed.
+- **Fix**: The first pay rate ever set for an employee now applies
+  retroactively to their whole history instead of defaulting to "today" —
+  caught live when an admin set a rate after the employee had already
+  worked hours that month.
+- **Fix**: Locking a month closure with `saveDraftAdjustments` afterward
+  now correctly reports "already locked" instead of the misleading "not
+  confirmed yet" — the two guard conditions used to overlap.
+- **Addition**: jest + ts-jest added to `backend/` (previously no test
+  runner); coverage for shift planning, closure/payroll, and the
+  forgotten-clock-out auto-close, each against a throwaway temp SQLite DB.
+- **Update**: Full dark, sharp-edged redesign (`tui.css` → `theme.css`),
+  replacing the light monochrome TUI look with a dark modern SaaS style —
+  amber accent used sparingly, no rounded corners, no colored accent
+  borders. Every existing CSS class name kept, so no component logic
+  needed to change. See [Design system](./frontend/design-system.md).
+- **Note**: `docker compose` on one of the deploy hosts is now broken even
+  for `up` (not just `ps`/`logs`/`down` as before) — redeploy there with
+  plain `docker run` instead; documented in
+  [Deployment](./architecture/deployment.md).
+
 ## 2026-08-12
 - **Update**: Documented the actual production shipping workflow in
   [Build & deployment](./architecture/deployment.md) — build locally for