db(couchdb): auto-provision databases on startup for production strategy; add TokenService with CouchDB-backed token storage and localStorage fallback; switch OAuth to unified config for client IDs and redirect URI; express Request typing for req.user; align exportAsEnvVars with show-config expectations; remove Vite importmap from index.html; prefer babel-jest over ts-jest; remove duplicate uuid mocking from Jest config

types/express.d.ts

@@ -0,0 +1,28 @@
+/**
+ * Express Request type augmentation
+ *
+ * Adds a `user` property to `Express.Request` to store authenticated user
+ * information attached by authentication middleware.
+ *
+ * The `user` shape is flexible to accommodate different token verification
+ * outputs. When using our JWT-based middleware, it will typically match
+ * `TokenPayload`, but we also allow `string` or a generic record for
+ * compatibility with other strategies.
+ */
+
+import type { TokenPayload } from '../services/auth/auth.types';
+
+declare global {
+  namespace Express {
+    interface Request {
+      /**
+       * Authenticated user payload attached by middleware.
+       * - Usually matches TokenPayload in this project.
+       * - May be a string or a generic object when using different verifiers.
+       */
+      user?: TokenPayload | string | Record<string, unknown>;
+    }
+  }
+}
+
+export {};