Move band management into dedicated settings pages

- Add BandSettingsPage (/bands/:id/settings/:panel) with Members,
  Storage, and Band Settings panels matching the mockup design
- Strip members list, invite controls, and NC folder config from
  BandPage — library view now focuses purely on recordings workflow
- Add band-scoped nav section to AppShell sidebar (Members, Storage,
  Band Settings) with correct per-panel active states
- Fix amAdmin bug: was checking if any member is admin; now correctly
  checks if the current user holds the admin role
- Add 31 vitest tests covering BandPage cleanliness, routing, access
  control (admin vs member), and per-panel mutation behaviour
- Add test:web, test:api:unit, test:feature (post-feature pipeline),
  and ci tasks to Taskfile; frontend tests run via podman node:20-alpine
- Add README with architecture overview, setup guide, and test docs
- Add @testing-library/dom and @testing-library/jest-dom to package.json

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Taskfile.yml

@@ -87,16 +87,51 @@ tasks:
 
 # ── Testing ───────────────────────────────────────────────────────────────────
 
+  # Run this after every feature branch — fast, no external services required.
+  test:feature:
+    desc: "Post-feature pipeline: typecheck + frontend tests + backend unit tests (no services needed)"
+    cmds:
+      - task: typecheck:web
+      - task: test:web
+      - task: test:api:unit
+      - task: test:worker
+      - task: test:watcher
+
+  # Full CI pipeline — runs everything including integration tests.
+  # Requires: services up (task dev:detach), DB migrated.
+  ci:
+    desc: "Full CI pipeline: lint + typecheck + all tests (requires services running)"
+    cmds:
+      - task: lint
+      - task: typecheck:web
+      - task: test:web
+      - task: test:api
+      - task: test:worker
+      - task: test:watcher
+
   test:
-    desc: Run all tests
+    desc: Run all backend tests (unit + integration)
     deps: [test:api, test:worker, test:watcher]
 
+  test:web:
+    desc: Run frontend unit tests (via podman — no local Node required)
+    dir: web
+    cmds:
+      - podman run --rm -v "$(pwd)":/app:Z -w /app node:20-alpine
+          sh -c "npm install --legacy-peer-deps --silent && npm run test"
+
   test:api:
-    desc: Run API tests with coverage
+    desc: Run all API tests with coverage (unit + integration)
     dir: api
     cmds:
       - uv run pytest tests/ -v --cov=src/rehearsalhub --cov-report=term-missing
 
+  test:api:unit:
+    desc: Run API unit tests only (no database or external services required)
+    dir: api
+    cmds:
+      - uv run pytest tests/unit/ -v -m "not integration"
+
   test:worker:
     desc: Run worker tests with coverage
     dir: worker
@@ -110,7 +145,7 @@ tasks:
       - uv run pytest tests/ -v --cov=src/watcher --cov-report=term-missing
 
   test:integration:
-    desc: Run integration tests
+    desc: Run integration tests (requires services running)
     dir: api
     cmds:
       - uv run pytest tests/integration/ -v -m integration