feat: add emergency incident workspace

.trellis/tasks/07-02-emergency-incident-workspace/implement.md

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+# Implementation Plan
+
+## 1. Types And Tests
+
+- Add emergency DTOs and validators.
+- Add `app/api/emergency/emergency-routes.test.ts` first.
+- Cover list, create, status update, permission denial, missing organization, invalid input, and missing/cross-organization incident.
+
+## 2. Server Operations And API Routes
+
+- Add `modules/emergency/server/operations.ts`.
+- Add `GET`/`POST /api/emergency/incidents`.
+- Add `PATCH /api/emergency/incidents/[id]`.
+- Use `requirePermission`, active organization checks, structured failures, and audit logs.
+
+## 3. Workspace UI
+
+- Replace `app/(app)/app/emergency/page.tsx`.
+- Keep scoped route delegating to the unscoped route.
+- Add `modules/emergency/components/EmergencyWorkspaceClient.tsx`.
+- Implement metrics, filters, create dialog, and status action buttons.
+
+## 4. Default Data
+
+- Existing default workspace already inserts representative `systemIncidents`.
+- Review whether the seed includes open/acknowledged/resolved and critical/warning/info; adjust only if needed.
+
+## 5. Verification
+
+- `pnpm test`
+- `pnpm lint`
+- `pnpm type-check`
+- `pnpm build`
+
+## Rollback Points
+
+- Remove `modules/emergency`, emergency API routes, and page changes.
+- No migration rollback expected unless implementation discovers schema changes are required.