feat: add wallet provider foundation

src/vite-env.d.ts

@@ -4,6 +4,7 @@ interface ImportMetaEnv {
   readonly VITE_API_URL: string;
   readonly VITE_API_PREFIX?: string;
   readonly VITE_ADMIN_UI_PREFIX?: string;
+  readonly VITE_WALLETCONNECT_PROJECT_ID?: string;
   /** When `"true"`, bundle admin UI only (no public pages); use with `VITE_ADMIN_UI_PREFIX` or default secret prefix. */
   readonly VITE_ADMIN_ONLY?: string;
 }