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/api/src/auth/devBypass.ts

@@ -153,6 +153,9 @@ export function devSessionCookieMiddleware(): MiddlewareHandler {
   // BL-01: warn loudly if the secret is the well-known dev placeholder. A genuine,
   // signature-valid session token minted under this known value is trivially forgeable
   // if the same secret ever leaks into a non-bypass environment.
+  // Not a security comparison — this matches against a PUBLIC well-known placeholder to
+  // emit a warning, so constant-time equality is irrelevant here.
+  // eslint-disable-next-line security/detect-possible-timing-attacks
   if (secret === 'dev-secret-change-me-0000000000000000') {
     console.warn(
       '[devSessionCookieMiddleware] LOCAL_SESSION_SECRET is the well-known dev placeholder. ' +