fix(19): satisfy CI fast-checks + secret scan

Lint (eslint --max-warnings 0):
- index.ts: disable no-unsafe-argument on the type-only Context mismatch when
  delegating to the OIDC handler inside the local-session skip wrapper
- localAuth.ts: handleLogout is sync (no await) — drop async (require-await)
- devBypass.ts: disable detect-possible-timing-attacks on the public well-known
  dev-placeholder string compare (not a secret comparison)
- remove dead code / unused bindings flagged by no-unused-vars: makeTestApp
  (localSession.test), makeUnauthContext + BrowserContext import (login.spec),
  unused memberId (admin.test), unused txSelectCount counter (me.test)
- localAuthMiddleware.test / me.test: fix unused + reflow-detached
  eslint-disable directives

Format: prettier --write across the 20 Phase-19 files that were never formatted.

Secret scan (gitleaks): allowlist two false positives — the synthetic >=32-char
TEST_SECRET in localSession.test.ts, and .planning/ design prose (a generic-api-key
regex hit on "credential atomically, 409-equivalent"). Neither is a real secret.

Verified locally: format:check, lint, typecheck, md:lint, gitleaks (no leaks),
PWA 266/266, API 452/452.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/pwa/src/App.tsx

@@ -195,10 +195,7 @@ export default function App() {
             Phase 19: shown when the user is unauthenticated AND localEnabled === true.
             The route itself always renders LoginPage (authMode gating is in the `*` route gate below).
             LoginPage receives authMode so it can show the optional OIDC button when oidcEnabled. */}
-        <Route
-          path="/login"
-          element={<LoginPage authMode={authModeQuery.data} />}
-        />
+        <Route path="/login" element={<LoginPage authMode={authModeQuery.data} />} />
 
         {/* All other routes are gated on setup completion */}
         <Route
@@ -213,7 +210,10 @@ export default function App() {
             ) : meQuery.isError && !meQuery.isLoading && authModeQuery.data?.localEnabled ? (
               // Unauthenticated + localEnabled: redirect to /login
               <Navigate to="/login" replace />
-            ) : meQuery.isError && !meQuery.isLoading && !authModeQuery.data?.localEnabled && authModeQuery.data?.oidcEnabled ? (
+            ) : meQuery.isError &&
+              !meQuery.isLoading &&
+              !authModeQuery.data?.localEnabled &&
+              authModeQuery.data?.oidcEnabled ? (
               // Unauthenticated + OIDC-only mode: top-level redirect to /api/login (today's behavior)
               // Use a render side-effect via useEffect isn't available here; use a helper element
               <OidcRedirect />

apps/pwa/src/api/client.ts

@@ -103,10 +103,7 @@ export async function fetchAuthMode(): Promise<{ localEnabled: boolean; oidcEnab
  *
  * Throws nothing on 200 OK — the local-session cookie is set by the server.
  */
-export async function fetchLocalLogin(body: {
-  username: string;
-  password: string;
-}): Promise<void> {
+export async function fetchLocalLogin(body: { username: string; password: string }): Promise<void> {
   const res = await fetch('/api/auth/local/login', {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },

apps/pwa/src/components/InstructionSheet.test.tsx

@@ -28,7 +28,14 @@ vi.mock('../hooks/usePushSubscription.js', () => ({
 // Mock client so the test doesn't make real network calls.
 vi.mock('../api/client.js', () => ({
   fetchMe: vi.fn().mockResolvedValue({
-    user: { id: 1, displayName: 'Test', color: '#4a90d9', isAdmin: false, needsProviderSetup: false, hasLocalCredential: false },
+    user: {
+      id: 1,
+      displayName: 'Test',
+      color: '#4a90d9',
+      isAdmin: false,
+      needsProviderSetup: false,
+      hasLocalCredential: false,
+    },
   }),
   fetchAuthMode: vi.fn().mockResolvedValue({ localEnabled: true, oidcEnabled: false }),
   fetchChangePassword: vi.fn().mockResolvedValue(undefined),

apps/pwa/src/components/SettingsSheet.tsx

@@ -500,10 +500,7 @@ export function SettingsSheet({ isOpen, onClose }: SettingsSheetProps) {
 
       {/* Surface 13 — Link OIDC confirmation sheet (hasLocalCredential + oidcEnabled gate) */}
       {linkOidcOpen && (
-        <LinkOidcSheet
-          isOpen={linkOidcOpen}
-          onClose={() => setLinkOidcOpen(false)}
-        />
+        <LinkOidcSheet isOpen={linkOidcOpen} onClose={() => setLinkOidcOpen(false)} />
       )}
     </>
   );
@@ -935,7 +932,9 @@ function LinkOidcSheet({ isOpen, onClose }: LinkOidcSheetProps) {
             color: 'var(--color-text-secondary, #6b7280)',
           }}
         >
-          {"After linking, you'll sign in with your OIDC provider instead of a username and password. Your local password will be removed."}
+          {
+            "After linking, you'll sign in with your OIDC provider instead of a username and password. Your local password will be removed."
+          }
         </p>
 
         {/* Secondary note */}

apps/pwa/src/routes/AdminPage.tsx

@@ -1241,8 +1241,7 @@ function ResetPasswordSheet({ isOpen, onClose, member }: ResetPasswordSheetProps
   });
 
   const isPending = resetMutation.isPending;
-  const submitDisabled =
-    isPending || newPassword.length === 0 || confirmPassword.length === 0;
+  const submitDisabled = isPending || newPassword.length === 0 || confirmPassword.length === 0;
 
   if (!isOpen) return null;
 

apps/pwa/src/routes/LoginPage.tsx

@@ -146,10 +146,7 @@ export function LoginPage({ authMode }: LoginPageProps) {
   const isLoading = loginMutation.isPending;
   const bothNonEmpty = username.trim().length > 0 && password.length > 0;
   const submitDisabled =
-    isLoading ||
-    !bothNonEmpty ||
-    loginError === 'rate-limit' ||
-    loginError === 'locked';
+    isLoading || !bothNonEmpty || loginError === 'rate-limit' || loginError === 'locked';
 
   // Derive whether inputs should show error state
   const inputHasError = loginError === 'invalid';

apps/pwa/src/styles/tokens.css

@@ -94,11 +94,11 @@
    * never the BrandSlot component structure (see 19-UI-SPEC.md §Brand Slot).
    * ───────────────────────────────────────────────────────────────────────── */
 
-  --brand-logo-bg: var(--color-member-0);       /* placeholder circle background */
-  --brand-logo-text: #ffffff;                   /* placeholder initials color */
-  --brand-logo-size: 48px;                      /* reserved slot height; keep 1:1 aspect */
-  --brand-logo-border-radius: 50%;              /* circle for initials; Phase 17 may change */
-  --brand-app-name: 'FamilySync';              /* drives doc only — not used as CSS content */
+  --brand-logo-bg: var(--color-member-0); /* placeholder circle background */
+  --brand-logo-text: #ffffff; /* placeholder initials color */
+  --brand-logo-size: 48px; /* reserved slot height; keep 1:1 aspect */
+  --brand-logo-border-radius: 50%; /* circle for initials; Phase 17 may change */
+  --brand-app-name: 'FamilySync'; /* drives doc only — not used as CSS content */
 
   /* ─────────────────────────────────────────────────────────────────────────
    * BREAKPOINTS (reference; use in @media queries)