Store picker in topbar, redesign cabinet, rename to WBfeed.ru

- index.html: store dropdown in topbar (switch without leaving page)
- cabinet.html: store-cards with Активировать/Проверить, edit hidden in <details>
- Removed 'Используется' button, active shown as green card + label
- next=index param to return to main page after store switch
- Brand name changed to WBfeed.ru across all templates

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

app.py

@@ -1202,6 +1202,8 @@ def cabinet():
                 token_row = db.get_token(int(token_id))
                 if token_row and (user["is_admin"] or token_row["user_id"] == user["id"]):
                     session["token_id"] = int(token_id)
+                    if request.form.get("next") == "index":
+                        return redirect(url_for("index"))
                     return redirect(url_for("cabinet", status="selected"))
             error_message = "Не удалось выбрать токен."
         elif action == "check":
@@ -1243,6 +1245,9 @@ def index():
     status = request.args.get("status")
     api_cooldown_seconds_left = _get_api_cooldown_seconds_left()
     _, active_token_name = _get_active_token()
+    active_token_id = session.get("token_id")
+    raw_tokens = db.fetch_tokens_for_user(g.user["id"], bool(g.user["is_admin"]))
+    tokens = [{"id": r["id"], "name": r["name"]} for r in raw_tokens]
     error_message: Optional[str] = None
     success_message: Optional[str] = None
     if status == "reply_sent":
@@ -1261,6 +1266,8 @@ def index():
         error_message=error_message,
         success_message=success_message,
         active_token_name=active_token_name,
+        active_token_id=active_token_id,
+        tokens=tokens,
         auto_reply_enabled=is_auto_reply_enabled(),
         api_cooldown_seconds_left=api_cooldown_seconds_left,
         next_fetch_seconds_left=_next_fetch_seconds_left(),