fix(02): dev-auth bypass no longer blocked by oidcAuthMiddleware

- index.ts: compute devBypassActive at startup; skip app.use(oidcAuthMiddleware)
  entirely when active so the OIDC guard never runs in local dev
- routes/me.ts: read c.get('user') first; return dev identity directly when
  devAuthBypass injected it, bypassing getAuth() and the DB upsert
- auth/devBypass.ts: add ContextVariableMap augmentation for 'user' key;
  correct stale comment that claimed getAuth/401 path was still active

apps/api/src/auth/devBypass.ts

@@ -9,12 +9,12 @@
  * When the bypass is inactive (wrong env, or NODE_ENV=production) the middleware is a
  * pure no-op passthrough — production behaviour is unchanged.
  *
- * Context key: 'user' — matches the key read by downstream consumers (e.g. routes/me.ts
+ * Context key: 'user' — matches the key read by downstream consumers.
- * calls getAuth(c) from @hono/oidc-auth; the events route will read c.get('user') directly).
+ * In dev bypass mode, c.get('user') returns DEV_USER. index.ts does NOT mount
- * In dev bypass mode, c.get('user') returns DEV_USER. getAuth(c) is still called by me.ts
+ * oidcAuthMiddleware when devBypassActive is true, so getAuth(c) is never called.
- * but will return null because no OIDC session cookie is present; me.ts guards this with
+ * routes/me.ts reads c.get('user') first and returns the dev identity directly,
- * `if (!auth) return 401`. When using the bypass, consume c.get('user') directly in routes
+ * skipping the DB upsert and getAuth path entirely. Other routes (e.g. events)
- * that need the user object (events route pattern in Plan 02).
+ * also read c.get('user') directly — same pattern, no change needed there.
  *
  * Security:
  *   - The FIRST conditional is always `NODE_ENV === 'production'` — checked before reading
@@ -35,6 +35,18 @@ export const DEV_USER = {
   color: COLOR_PALETTE[0], // '#4A90D9' — first palette slot
 } as const
 
+/**
+ * Extend Hono's ContextVariableMap so that c.get('user') / c.set('user', ...)
+ * are statically typed throughout the app. The value type is the DEV_USER shape,
+ * which is compatible with both the bypass path and any future app-level user object
+ * stored on context (they share the same id/displayName/color subset).
+ */
+declare module 'hono' {
+  interface ContextVariableMap {
+    user: typeof DEV_USER
+  }
+}
+
 /**
  * Returns a Hono MiddlewareHandler that injects DEV_USER into the request context
  * when the dev-auth bypass is active, or a pure passthrough when inactive.

apps/api/src/index.ts

@@ -11,6 +11,17 @@ import { startBrokerPoller } from './broker/poller.js'
 
 export const app = new Hono()
 
+// Compute once at startup: bypass is active only in non-production with explicit opt-in.
+// In production NODE_ENV='production' → devBypassActive=false → OIDC is always mounted.
+const devBypassActive =
+  process.env.NODE_ENV !== 'production' && process.env.DEV_AUTH_BYPASS === 'true'
+
+if (devBypassActive) {
+  console.warn(
+    '⚠ DEV_AUTH_BYPASS active — OIDC guard DISABLED. Never use in production.',
+  )
+}
+
 // OIDC callback — must be registered BEFORE oidcAuthMiddleware so the
 // authorization-code exchange is not itself intercepted by the auth check (T-02-02)
 app.get('/callback', (c) => processOAuthCallback(c))
@@ -19,15 +30,19 @@ app.get('/callback', (c) => processOAuthCallback(c))
 app.route('/health', healthRouter)
 
 // Dev-auth bypass — no-op passthrough unless DEV_AUTH_BYPASS=true AND NODE_ENV!='production'.
-// When active, injects a fixed dev user so the OIDC guard below is not required for local dev.
+// When active, injects DEV_USER into the Hono context and the OIDC guard is NOT mounted.
 // Must be mounted BEFORE oidcAuthMiddleware (T-02-01 mitigation; see auth/devBypass.ts).
 app.use('/api/*', devAuthBypass())
 
 // Protect all /api/* routes with OIDC session middleware (AUTH-01, T-02-05).
+// Skipped entirely when devBypassActive so that local dev works without Authelia.
+// In production devBypassActive is always false — OIDC is unconditionally mounted.
 // Unauthenticated requests receive a 302 redirect to Authelia's authorize endpoint.
 // OIDC_AUTH_EXTERNAL_URL is MANDATORY behind Pangolin to construct the correct
 // redirect_uri (Pitfall 1). Set it to https://familysync.<domain>.
+if (!devBypassActive) {
   app.use('/api/*', oidcAuthMiddleware())
+}
 
 // Protected API routes (behind oidcAuthMiddleware)
 app.route('/api/me', meRouter)

apps/api/src/routes/me.ts

@@ -1,13 +1,19 @@
 /**
  * GET /api/me — returns the authenticated user's identity and assigned color.
  *
- * Flow:
+ * Flow (normal — OIDC active):
  *   1. getAuth(c) reads iss + sub from the OIDC session JWT cookie
  *      (validated and refreshed by oidcAuthMiddleware — never reaches here unauthenticated)
  *   2. upsertUser(iss, sub, email) writes the user row on first visit, returns
  *      the existing row on subsequent visits (idempotent, keyed on iss+sub, D-10)
  *   3. Returns { user: { id, displayName, color } }
  *
+ * Flow (dev bypass — DEV_AUTH_BYPASS=true, non-production):
+ *   devAuthBypass() injects DEV_USER via c.set('user', DEV_USER). oidcAuthMiddleware
+ *   is NOT mounted in index.ts when the bypass is active, so getAuth(c) is never called.
+ *   This handler reads c.get('user') first and short-circuits to return the dev identity
+ *   directly, skipping the DB upsert.
+ *
  * The OIDC session cookie is httpOnly + Secure + SameSite (T-02-03).
  * No credential or refresh-token data is included in the response (T-02-04).
  */
@@ -15,12 +21,28 @@
 import { Hono } from 'hono'
 import { getAuth } from '../auth/middleware.js'
 import { upsertUser } from '../auth/user.js'
+// Side-effect import: brings in the ContextVariableMap augmentation for c.get('user')
+import '../auth/devBypass.js'
 
 export const meRouter = new Hono()
 
 meRouter.get('/', async (c) => {
-  // getAuth returns null only if the session is invalid — oidcAuthMiddleware on
+  // Dev-auth bypass path: devAuthBypass() sets c.get('user') to DEV_USER when active.
-  // /api/* redirects unauthenticated requests before this handler is reached.
+  // Return the injected dev identity directly — no DB round-trip, no OIDC session needed.
+  const devUser = c.get('user')
+  if (devUser) {
+    return c.json({
+      user: {
+        id: devUser.id,
+        displayName: devUser.displayName,
+        color: devUser.color,
+      },
+    })
+  }
+
+  // Normal OIDC path: getAuth returns null only if the session is invalid.
+  // oidcAuthMiddleware on /api/* redirects unauthenticated requests before this handler
+  // is reached, so null here indicates a genuine session error.
   const auth = await getAuth(c)
   if (!auth) {
     return c.json({ error: 'Unauthorized' }, 401)