feat: add subscription reissue button with cooldown timer

- Add revokeSubscription API method
- Add reissue button in Additional Options with amber styling,
  destructive confirm dialog, 15-min cooldown with countdown timer,
  localStorage persistence across page reloads
- Add i18n keys in all 4 locales (en, ru, zh, fa)

src/api/subscription.ts

@@ -540,6 +540,17 @@ export const subscriptionApi = {
     return response.data;
   },
 
+  // ── Revoke (reissue) ────────────────────────────────────────────────
+
+  revokeSubscription: async (subscriptionId?: number) => {
+    const response = await apiClient.post(
+      '/cabinet/subscription/revoke',
+      undefined,
+      withSubId(subscriptionId),
+    );
+    return response.data;
+  },
+
   // ── Daily subscription ──────────────────────────────────────────────
 
   togglePause: async (