T-529 default to cmhub gateway

app/gui/tabs/settings.py

@@ -68,6 +68,7 @@ class SettingsTab(QWidget):
         self.backend_combo.setObjectName("aiBackendCombo")
         for label, value in self.BACKEND_ITEMS:
             self.backend_combo.addItem(label, value)
+        self.backend_combo.setVisible(False)
         self.cmhub_base_url_edit = QLineEdit()
         self.cmhub_base_url_edit.setObjectName("cmhubBaseUrlEdit")
         self.cmhub_base_url_edit.setPlaceholderText("https://<cmhub>")
@@ -266,8 +267,6 @@ class SettingsTab(QWidget):
             ]
         )
 
-        backend_form = self._three_column_form([("AI 后端", self.backend_combo)])
-
         self.model_picker_panel = QWidget()
         self.model_picker_panel.setLayout(model_picker_layout)
 
@@ -313,7 +312,7 @@ class SettingsTab(QWidget):
         self.settings_panel_layout = panel_layout
         panel_layout.setContentsMargins(13, 18, 13, 18)
         self.ai_model_section_title = self._section_title(
-            "AI 模型",
+            "cmhub 网关",
             "settingsAiModelSectionTitle",
         )
         self.model_detail_section_title = self._section_title(
@@ -333,7 +332,6 @@ class SettingsTab(QWidget):
             "settingsInfrastructureSectionTitle",
         )
         panel_layout.addWidget(self.ai_model_section_title)
-        panel_layout.addLayout(backend_form)
         panel_layout.addWidget(self.model_picker_panel)
         panel_layout.addSpacing(14)
         panel_layout.addWidget(self.model_detail_section_title)
@@ -437,8 +435,6 @@ class SettingsTab(QWidget):
     def _maybe_auto_refresh_cmhub_models(self):
         if self._cmhub_auto_refresh_done:
             return
-        if (self.backend_combo.currentData() or "direct") != "cmhub":
-            return
         if not self.cmhub_base_url_edit.text().strip() or not self.cmhub_api_key_edit.text():
             return
         self._cmhub_auto_refresh_done = True
@@ -454,12 +450,12 @@ class SettingsTab(QWidget):
         return appconfig.CMHUB_CONFIG_PATH
 
     def _on_backend_changed(self, index=None):
-        is_cmhub = (self.backend_combo.currentData() or "direct") == "cmhub"
-        self.model_picker_panel.setVisible(not is_cmhub)
-        self.model_detail_section_title.setVisible(not is_cmhub)
-        self.model_detail_panel.setVisible(not is_cmhub)
-        self.direct_role_panel.setVisible(not is_cmhub)
-        self.cmhub_panel.setVisible(is_cmhub)
+        self.backend_combo.setVisible(False)
+        self.model_picker_panel.setVisible(False)
+        self.model_detail_section_title.setVisible(False)
+        self.model_detail_panel.setVisible(False)
+        self.direct_role_panel.setVisible(False)
+        self.cmhub_panel.setVisible(True)
         self._set_cmhub_running(self.cmhub_thread is not None)
         self._update_button_state()
 
@@ -623,12 +619,9 @@ class SettingsTab(QWidget):
             self._show_error("默认调试端口必须在调试端口范围内")
             return None
         ai_cfg = appconfig.ai_config(self.config)
-        backend = self.backend_combo.currentData() or "direct"
+        backend = "cmhub"
         text_model = self.default_text_model_combo.currentData() or ai_cfg.get("default_text_model")
         image_model = self.default_image_model_combo.currentData() or ai_cfg.get("default_image_model")
-        if backend == "direct" and (not text_model or not image_model):
-            self._show_error("标题大模型和图片大模型不能为空")
-            return None
         cmhub_cfg = self._cmhub_settings_values(backend)
         if cmhub_cfg is None:
             return None
@@ -686,23 +679,9 @@ class SettingsTab(QWidget):
             "connect_timeout": self.cmhub_connect_timeout_spin.value(),
             "check_balance_before_batch": self.cmhub_check_balance_checkbox.isChecked(),
         }
-        if backend != "cmhub":
-            merged = dict(current)
-            merged.update(values)
-            return merged
-        missing = []
-        if not values["base_url"]:
-            missing.append("Base URL")
-        if not self.cmhub_api_key_edit.text():
-            missing.append("API Key")
-        if not values["title_alias"]:
-            missing.append("生文别名")
-        if not values["image_alias"]:
-            missing.append("生图别名")
-        if missing:
-            self._show_error("cmhub 配置不完整：缺少 " + "、".join(missing))
-            return None
-        return values
+        merged = dict(current)
+        merged.update(values)
+        return merged
 
     def _replace_config(self, saved):
         internal = {}
@@ -719,8 +698,7 @@ class SettingsTab(QWidget):
     def _populate_app_settings(self):
         self._populate_role_model_combos()
         ai_cfg = appconfig.ai_config(self.config)
-        backend = ai_cfg.get("backend", "direct")
-        self._set_combo_by_data(self.backend_combo, backend)
+        self._set_combo_by_data(self.backend_combo, "cmhub")
         cmhub_cfg = appconfig.cmhub_config(self.config)
         self.cmhub_base_url_edit.setText(cmhub_cfg.get("base_url", ""))
         self._loaded_cmhub_api_key = appconfig.get_cmhub_api_key(path=self.cmhub_config_path)