Route same-origin API via /apnew/api to bypass ALB /api* rule.

ALB sends /api/* to an unreachable backend target group (502 on apex).
Use VITE_API_PREFIX=/apnew with nginx proxy to backend-1 until the listener rule is removed.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/vite-env.d.ts

@@ -2,6 +2,7 @@
 
 interface ImportMetaEnv {
   readonly VITE_API_URL: string;
+  readonly VITE_API_PREFIX?: string;
   readonly VITE_WALLETCONNECT_PROJECT_ID: string;
   readonly VITE_ADMIN_UI_PREFIX?: string;
   /** When `"true"`, bundle admin UI only (no public pages); use with `VITE_ADMIN_UI_PREFIX` or default secret prefix. */