feat(subscription): add expiry recovery flow

app/gui/tabs/settings.py

@@ -66,6 +66,7 @@ class SettingsTab(QWidget):
     """Tab 5: AI model definitions stored in data/config/ai_models.json."""
 
     settingsSaved = Signal(str)
+    subscriptionCheckRequested = Signal()
 
     BACKEND_ITEMS = [
         ("默认网关", "cmhub"),
@@ -279,6 +280,9 @@ class SettingsTab(QWidget):
         self.cdp_ready_timeout_spin.setObjectName("cdpReadyTimeoutSpin")
         self.cdp_ready_timeout_spin.setRange(1, 3600)
         self.save_config_button = QPushButton("保存设置")
+        self.subscription_check_button = QPushButton("重新检测会员状态")
+        self.subscription_check_button.setObjectName("subscriptionCheckButton")
+        self.subscription_check_button.setToolTip("重新查询当前 cmhub 账号的会员套餐状态")
         self.unsaved_changes_label = QLabel("● 未保存更改")
         self.unsaved_changes_label.setObjectName("settingsUnsavedChangesLabel")
         self.unsaved_changes_label.setStyleSheet("color: #bc4c00; font-weight: 600;")
@@ -455,6 +459,7 @@ class SettingsTab(QWidget):
         save_settings_layout.addWidget(self.save_config_button)
         save_settings_layout.addWidget(self.unsaved_changes_label)
         save_settings_layout.addStretch(1)
+        save_settings_layout.addWidget(self.subscription_check_button)
         panel_layout.addLayout(save_settings_layout)
         panel_layout.addStretch(1)
 
@@ -490,6 +495,9 @@ class SettingsTab(QWidget):
         self.chrome_path_browse_button.clicked.connect(self.browse_chrome_path)
         self.chrome_path_detect_button.clicked.connect(self.detect_chrome_path)
         self.save_config_button.clicked.connect(self.save_app_settings)
+        self.subscription_check_button.clicked.connect(
+            self._request_subscription_check
+        )
         self._connect_dirty_signals()
 
         with self._dirty_tracking_suspended():
@@ -548,6 +556,16 @@ class SettingsTab(QWidget):
     def _set_status(self, message, level=None):
         _emit_status(self.status_callback, message, level=level)
 
+    def _request_subscription_check(self, checked=False):
+        self.subscriptionCheckRequested.emit()
+
+    def set_subscription_check_running(self, running):
+        running = bool(running)
+        self.subscription_check_button.setEnabled(not running)
+        self.subscription_check_button.setText(
+            "正在检测会员状态..." if running else "重新检测会员状态"
+        )
+
     @contextmanager
     def _dirty_tracking_suspended(self):
         self._suspend_dirty += 1