docs: split CLAUDE.md into focused reference files

Move Common Commands to docs/COMMANDS.md and add docs/CONVENTIONS.md
for frontend patterns (SWR, filters, Mantine, routing, API URLs).
CLAUDE.md now only contains runtime rules and pointers.

CLAUDE.md

@@ -13,31 +13,9 @@ Default to Bun instead of Node.js everywhere:
 - `bunx <pkg>` not `npx`
 - Bun auto-loads `.env` — never use dotenv.
 
-## Common Commands
+## Commands
 
-```bash
-bun run dev          # dev server with hot reload (bun --watch src/serve.ts)
-bun run build        # Vite production build
-bun run start        # production server (NODE_ENV=production)
-bun run typecheck    # tsc --noEmit
-bun run lint         # biome check src/
-bun run lint:fix     # biome check --write src/
-
-# Database
-bun run db:migrate   # prisma migrate dev
-bun run db:seed      # seed demo data
-bun run db:generate  # regenerate prisma client
-bun run db:studio    # Prisma Studio GUI
-bun run db:push      # push schema without migration
-
-# Tests
-bun run test              # all tests
-bun run test:unit         # tests/unit/
-bun run test:integration  # tests/integration/ — no server needed
-bun run test:e2e          # tests/e2e/ — requires Lightpanda Docker
-```
-
-Run a single test file: `bun test tests/integration/auth.test.ts`
+See @docs/COMMANDS.md
 
 ## Architecture
 
@@ -50,3 +28,7 @@ See @docs/TESTING.md
 ## Dev Tools
 
 See @docs/DEV_TOOLS.md
+
+## Frontend Conventions
+
+See @docs/CONVENTIONS.md

docs/COMMANDS.md

@@ -0,0 +1,25 @@
+# Commands
+
+```bash
+bun run dev          # dev server with hot reload (bun --watch src/serve.ts)
+bun run build        # Vite production build
+bun run start        # production server (NODE_ENV=production)
+bun run typecheck    # tsc --noEmit
+bun run lint         # biome check src/
+bun run lint:fix     # biome check --write src/
+
+# Database
+bun run db:migrate   # prisma migrate dev
+bun run db:seed      # seed demo data
+bun run db:generate  # regenerate prisma client
+bun run db:studio    # Prisma Studio GUI
+bun run db:push      # push schema without migration
+
+# Tests
+bun run test              # all tests
+bun run test:unit         # tests/unit/
+bun run test:integration  # tests/integration/ — no server needed
+bun run test:e2e          # tests/e2e/ — requires Lightpanda Docker
+```
+
+Run a single test file: `bun test tests/integration/auth.test.ts`

docs/CONVENTIONS.md

@@ -0,0 +1,66 @@
+# Frontend Conventions
+
+## Data Fetching
+
+- **SWR** for read-only data in route components (tables, lists, charts).
+- **TanStack Query** (`useQuery`, `useMutation`) for auth state — see `src/frontend/hooks/useAuth.ts`.
+- Never mix both in the same component/page.
+- Debounce search inputs: `useDebouncedValue(search, 400)` + `useEffect` that only triggers when length >= 3 or === 0.
+
+## API URL Builder
+
+All URLs go through `src/frontend/config/api.ts` → `API_URLS`. Add new entries there, never inline URLs in components.
+
+Desa+ endpoints are proxied via `/api/proxy/desa-plus` → `DESA_PLUS_PROXY` constant. The actual API source is at:
+`/Users/wibu04/Documents/Projects/sistem-desa-mandiri/src/app/api/monitoring/[[...slug]]/route.ts`
+
+## Filters & Pagination Pattern
+
+Server-side filtering — always pass filter params to the API, never filter client-side on paginated data.
+
+State pattern for a filtered table page:
+```ts
+const [page, setPage] = useState(1)
+const [search, setSearch] = useState('')          // raw input
+const [searchQuery, setSearchQuery] = useState('') // debounced, sent to API
+const [debouncedSearch] = useDebouncedValue(search, 400)
+
+useEffect(() => {
+  if (debouncedSearch.length >= 3 || debouncedSearch.length === 0) {
+    setSearchQuery(debouncedSearch)
+    setPage(1)
+  }
+}, [debouncedSearch])
+
+useEffect(() => { setPage(1) }, [filterA, filterB]) // reset page on filter change
+```
+
+## Mantine Components
+
+- Dark theme forced (`#242424`). Never add light-mode conditionals.
+- `radius="md"` on inputs, `radius="2xl"` on container `Paper`.
+- `className="glass"` on `Paper` cards for the frosted glass effect.
+- `size="sm"` on table inputs and selects.
+- Icons from `react-icons/tb` only — no other icon libraries.
+- `DatePickerInput` from `@mantine/dates` with `type="range"` returns `[string | null, string | null]`, not Date objects.
+
+## Route Files
+
+File-based routing via TanStack Router Vite plugin. Files in `src/frontend/routes/`:
+
+| Pattern | Route |
+|---|---|
+| `apps.$appId.tsx` | Layout wrapper for per-app pages |
+| `apps.$appId.index.tsx` | Overview/dashboard for an app |
+| `apps.$appId.users.index.tsx` | User management |
+| `apps.$appId.logs.tsx` | Activity logs |
+| `apps.$appId.villages.tsx` | Villages layout |
+| `apps.$appId.villages.index.tsx` | Village list |
+| `apps.$appId.villages.$villageId.tsx` | Village detail |
+
+`routeTree.gen.ts` is auto-generated — never edit it manually.
+
+## App Registration
+
+App configs (ID, menu items) live in `src/frontend/config/appMenus.ts`. Add new apps there to register them.
+Currently active app: `desa-plus`.