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# Implementation Plan
## Checklist
1. Reconcile existing Drizzle migration state:
- Confirm `modules/core/server/schema.ts` matches `drizzle/` migrations.
- Confirm `modules/core/server/db.ts` is the only PostgreSQL connection boundary.
- Confirm `modules/core/server/store.ts` is treated as a compatibility read model only.
- Remove task assumptions that mention JSON file writes as the target persistence layer.
2. Verify existing auth/RBAC/audit slice:
- Confirm setup creates platform admin, organization, session, organization roles, membership, and audit log.
- Confirm login/logout uses server APIs and the `teatea_session` HTTP-only cookie.
- Confirm `requirePermission` logs denied permission checks.
- Confirm roles and permissions cover facility and admission operations.
3. Finish elder CRUD on Drizzle:
- Keep validation in `modules/elders/types.ts`.
- Ensure list/create/update/delete APIs query and mutate Drizzle only.
- Ensure elder create with `bedId` performs admission and bed status updates inside a transaction.
- Ensure UI refresh and error handling remain usable.
4. Add or complete bed/admission APIs:
- Keep `GET /api/facilities/rooms` and `GET /api/facilities/beds` Drizzle-backed.
- Keep `POST /api/admissions` transactional for admit/transfer.
- Add discharge and explicit transfer mutation support if the existing POST shape is not enough.
- Return structured `{ success, reason, ... }` responses for conflicts and validation failures.
- Write audit events for admission create, transfer, discharge, and facility mutations implemented in this task.
5. Build bed/admission UI:
- Replace "please create through API" empty states with usable controls where permission allows.
- Add tabs or segmented navigation for overview, bed status, admission actions/history, and facility records.
- Move admission actions into the bed/admission workspace.
- Remove or replace the dead global top-bar "入住" button in `AppShell`.
- Ensure page layout matches screenshot feedback: compact workspace header, no oversized intro block, local page actions.
6. Introduce selected Phase 2 UI affordances:
- Add tabs to pages that combine overview and management modes.
- Keep implementation incremental; do not attempt every sidebar module.
- Keep user-facing copy operational and concise.
7. Add standard chart usage:
- Decide the chart library before adding dependency. Recharts is the likely default unless a better project fit is chosen.
- Install the library only after checking existing dependencies.
- Replace at least one meaningful hand-built chart with a data-backed chart component.
- Keep chart component client-only and pass serializable server data into it.
8. Replace hard-coded operational counters where data exists:
- Dashboard bed/elder/admission counters should come from Drizzle-backed data.
- Bed/admission workspace metrics should compute from server-loaded rooms, beds, and admissions.
- Do not fabricate counters for modules that remain out of scope.
9. Verification:
- Run `pnpm lint`.
- Run `pnpm type-check`.
- Run `pnpm build`.
- Run Drizzle generation/check commands when schema changes are made.
- Start dev server and manually exercise setup/login/elder CRUD/bed admission/transfer/discharge/settings if build passes.
## Files Expected to Change
- `.trellis/tasks/07-01-nextjs-fullstack-crud-rbac-audit/prd.md`
- `.trellis/tasks/07-01-nextjs-fullstack-crud-rbac-audit/design.md`
- `.trellis/tasks/07-01-nextjs-fullstack-crud-rbac-audit/implement.md`
- `modules/shared/components/AppShell.tsx`
- `app/(app)/app/beds/page.tsx`
- `app/(app)/app/dashboard/page.tsx`
- `modules/dashboard/components/DashboardHome.tsx`
- `app/api/admissions/route.ts`
- Potentially `app/api/admissions/[id]/route.ts`
- Potentially facility UI components under `modules/` if the bed page is split into smaller client/server components.
## Files Expected to Stay As Existing Foundations
- `modules/core/server/db.ts`
- `modules/core/server/schema.ts`
- `modules/core/server/auth.ts`
- `modules/core/server/permissions.ts`
- `modules/core/server/audit.ts`
- `modules/core/server/api.ts`
- `modules/core/server/store.ts` as a temporary Drizzle-backed read model.
- Existing auth route handlers unless verification finds a concrete bug.
- Existing elder route handlers unless admission or bed assignment behavior requires a narrow fix.
## Dependency Notes
- Do not add oRPC or better-auth in this task.
- Do not reintroduce JSON-file persistence.
- A standard chart library may be added after dependency review. Prefer a focused dashboard dependency over a broad visualization stack.
## Validation Commands
```bash
pnpm lint
pnpm type-check
pnpm build
pnpm db:generate
```
If schema files are changed, also validate migrations and run the migration flow against the configured development database:
```bash
pnpm db:migrate
```
## Rollback Points
- If admission mutation UI is unstable, keep the Drizzle APIs and temporarily render a read-only admissions table.
- If discharge/transfer API design becomes too broad, implement only admission create/transfer in this slice and keep discharge as a clearly scoped follow-up.
- If chart dependency causes build or bundle issues, remove the chart component and keep the server data preparation in place.
- If tabs cause layout regressions, keep the page-local action placement and defer only the tab styling.