Remove dead review-fetching from index(), hide API cooldown errors

- index() no longer calls fetch_reviews (UI doesn't use it)
- API cooldown shown only as 'Следующий ответ через X сек.'
- Cleaned up unused variables from render_template call

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.py

@@ -1240,48 +1240,11 @@ def cabinet():
 @app.route("/")
 @login_required
 def index():
-    action = request.args.get("action") or "all"
     status = request.args.get("status")
-    selected_stars_list = _parse_selected_stars(request.args.getlist("stars"))
-    selected_stars = set(selected_stars_list)
-    selected_stars_display = sorted(selected_stars, reverse=True)
-    next_auto_reply_at, next_auto_reply_in_seconds = _next_auto_reply_meta()
     api_cooldown_seconds_left = _get_api_cooldown_seconds_left()
-    active_token_value, active_token_name = _get_active_token()
-    client: Optional[FeedbackClient] = None
-    client_error: Optional[str] = None
-    try:
-        client = get_client()
-    except FeedbackApiError as exc:
-        client_error = str(exc)
-    reviews: List[Review] = []
-    current_filter: Optional[str] = None
+    _, active_token_name = _get_active_token()
     error_message: Optional[str] = None
     success_message: Optional[str] = None
-
-    if action in {"all", "unanswered"}:
-        if client:
-            try:
-                if action == "all":
-                    reviews = client.fetch_reviews(
-                        limit=50,
-                        unanswered_only=False,
-                        allowed_ratings=selected_stars,
-                    )
-                    current_filter = "all"
-                else:
-                    reviews = client.fetch_reviews(
-                        limit=50,
-                        unanswered_only=True,
-                        allowed_ratings=selected_stars,
-                    )
-                    current_filter = "unanswered"
-            except FeedbackApiError as exc:
-                error_message = str(exc)
-        else:
-            error_message = client_error or "Токен не задан."
-    elif action == "clear":
-        return redirect(url_for("index"))
     if status == "reply_sent":
         count = request.args.get("count") or "0"
         success_message = f"Отправлено ответов: {count}"
@@ -1295,21 +1258,10 @@ def index():
 
     return render_template(
         "index.html",
-        reviews=reviews,
-        current_filter=current_filter,
         error_message=error_message,
         success_message=success_message,
-        selected_stars=selected_stars,
-        selected_stars_display=selected_stars_display,
-        selected_stars_list=selected_stars_list,
         active_token_name=active_token_name,
-        has_token=bool(active_token_value),
-        current_action=action or "all",
         auto_reply_enabled=is_auto_reply_enabled(),
-        auto_reply_interval_minutes=AUTO_REPLY_INTERVAL_MINUTES,
-        auto_reply_interval_seconds=AUTO_REPLY_INTERVAL_SECONDS,
-        next_auto_reply_at=next_auto_reply_at,
-        next_auto_reply_in_seconds=next_auto_reply_in_seconds,
         api_cooldown_seconds_left=api_cooldown_seconds_left,
         next_fetch_seconds_left=_next_fetch_seconds_left(),
         enabled_stars=list(_load_enabled_stars()),