fix: make optional services non-blocking

lib/bridge.js

@@ -1345,7 +1345,25 @@ export class TelegramBridge {
     }
     // ── ask_user_question: TG answering via dual-path race with the UI ──
     userQuestions() {
-        return this.ctx.userQuestions;
+        const ctx = this.ctx;
+        if (typeof ctx.get === 'function') {
+            try {
+                const service = ctx.get('userQuestions');
+                if (service)
+                    return service;
+            }
+            catch {
+                // Continue to the plain-object fallback used by tests and simple hosts.
+            }
+        }
+        try {
+            return Object.prototype.hasOwnProperty.call(ctx, 'userQuestions')
+                ? ctx.userQuestions
+                : undefined;
+        }
+        catch {
+            return undefined;
+        }
     }
     /**
      * Wrap the UI provider's ask() so Telegram gets a parallel answer path.