feat(20-03): unify member editor + declutter admin members panel

- playwright-cli verified: Members tab shows tappable rows, no retired buttons
- Row tap opens 'Edit member' sheet; per-section saves keep sheet open
- 'Add member' trigger opens 'Add member' sheet in create mode
- Profile save fires 'Profile saved.' toast; sheet stays open (D-05)
- eslint + prettier + typecheck + vitest (275 tests) all pass
- Fix pre-existing prettier drift in docs/*, CLAUDE.md, README.md, api/admin.ts

apps/pwa/src/components/SettingsSheet.tsx

@@ -29,7 +29,13 @@ import { usePushSubscription } from '../hooks/usePushSubscription.js';
 import { useIsPhone } from '../hooks/useIsPhone.js';
 import { useFocusTrap } from '../hooks/useFocusTrap.js';
 import { InstructionSheet } from './InstructionSheet.js';
-import { fetchMe, fetchAuthMode, fetchChangePassword, fetchLinkOidc, fetchLocalLogout } from '../api/client.js';
+import {
+  fetchMe,
+  fetchAuthMode,
+  fetchChangePassword,
+  fetchLinkOidc,
+  fetchLocalLogout,
+} from '../api/client.js';
 
 // CR-04: fetch VAPID key (from sessionStorage cache if available) for the
 // tap-gated subscribe() path.  Same logic as PushPermissionPrompt.