feat(settings): support gateway source switching

app/gui/tabs/generate.py

@@ -1089,7 +1089,7 @@ class GenerateTab(QWidget):
         self.failed_progress_label = QLabel("失败 0")
         self.failed_progress_label.setObjectName("generateFailedProgressLabel")
         self.failed_progress_label.setVisible(False)
-        self.cmhub_balance_label = QLabel("cmhub余额：未获取")
+        self.cmhub_balance_label = QLabel("默认网关余额：未获取")
         self.cmhub_balance_label.setObjectName("generateCmhubBalanceLabel")
         self.cmhub_balance_label.setVisible(False)
         self.title_elapsed_label = QLabel("生标题用时 0 秒")
@@ -1760,6 +1760,21 @@ class GenerateTab(QWidget):
         if not self._save_generate_mode_setting(show_status=False):
             return
         generate_mode = self._current_generate_mode()
+        if not self._is_cmhub_backend():
+            try:
+                ai.validate_direct_generation_config(
+                    self.config,
+                    generate_mode,
+                    models_path=(
+                        self.config.get("ai_models_path")
+                        or appconfig.ai_models_config_path(self.config)
+                    ),
+                )
+            except Exception as exc:
+                message = "自定义网关配置不完整：%s。请到⑤设置补齐本轮所需模型的地址、模型ID、API Key、接口类型和启用状态。" % str(exc)
+                QMessageBox.warning(self, "无法开始生成", message)
+                self._set_status("自定义网关配置不完整，请到⑤设置补齐", "warning")
+                return
         generate_cover = appconfig.generate_mode_includes_cover(generate_mode)
         base_candidates = self._generation_candidates(generate_mode)
         if not base_candidates:
@@ -1837,7 +1852,12 @@ class GenerateTab(QWidget):
                 "generate_mode": generate_mode,
             }
         )
-        self._set_status(f"开始 AI 生成：{len(tasks)} 条")
+        if self._is_cmhub_backend():
+            self._set_status(f"开始 AI 生成：{len(tasks)} 条")
+        else:
+            self._set_status(
+                "开始 AI 生成：%d 条；自定义网关（不计点数，费用由服务商收取）" % len(tasks)
+            )
         thread.start()
 
     def _generation_candidates(self, generate_mode):
@@ -2282,7 +2302,7 @@ class GenerateTab(QWidget):
     def _reset_cmhub_balance_label(self):
         self.cmhub_balance_label.setVisible(False)
         if self._is_cmhub_backend():
-            self.cmhub_balance_label.setText("cmhub余额：生成后刷新")
+            self.cmhub_balance_label.setText("默认网关余额：生成后刷新")
         else:
             self.cmhub_balance_label.setText("")
 
@@ -2293,9 +2313,14 @@ class GenerateTab(QWidget):
         balance = payload.get("points_balance") if isinstance(payload, dict) else None
         if balance is None:
             if not self.cmhub_balance_label.text():
-                self.cmhub_balance_label.setText("cmhub余额：未获取")
+                self.cmhub_balance_label.setText("默认网关余额：未获取")
             return
-        self.cmhub_balance_label.setText(f"cmhub余额：{balance}")
+        self.cmhub_balance_label.setText(f"默认网关余额：{balance}")
+
+    def refresh_gateway_state(self):
+        """Clear source-specific feedback after ⑤ saves a new gateway source."""
+
+        self._reset_cmhub_balance_label()
 
     def _is_cmhub_backend(self):
         try: