feat(product-suite): decouple ai writing gateway

app/gui/tabs/product_suite.py

@@ -4604,14 +4604,30 @@ class ProductSuiteTab(QWidget):
             return
         self._status("已完成已提交图片查询，请查看生成结果", "success")
 
-    def _require_default_gateway(self, action):
-        if self._is_default_gateway():
-            return True
-        self._message("当前不可用", "%s仅支持默认网关，请到⑤设置切换后再使用。" % action)
-        return False
+    def _ai_write_config_error(self):
+        try:
+            cmhub_config = appconfig.cmhub_config(self.config)
+            base_url = appconfig.normalize_cmhub_base_url(cmhub_config.get("base_url"))
+            api_key = appconfig.get_cmhub_api_key(self.cmhub_config_path)
+            alias = str(cmhub_config.get("vision_alias") or "").strip()
+        except Exception:
+            return "默认网关图片理解配置无法读取"
+        if not base_url:
+            return "尚未配置默认网关地址"
+        if not api_key:
+            return "尚未配置默认网关 API Key"
+        if not alias:
+            return "尚未选择图片理解模型"
+        return ""
 
     def start_ai_write(self, checked=False):
-        if not self._require_default_gateway("商品套图AI帮写"):
+        config_error = self._ai_write_config_error()
+        if config_error:
+            self._message(
+                "AI帮写配置不完整",
+                "%s。请到⑤设置补齐默认网关的地址、API Key 和图片理解模型。"
+                % config_error,
+            )
             return
         if self.subscription_preflight_callback is not None and not self.subscription_preflight_callback("开始 AI 帮写"):
             return
@@ -4634,10 +4650,14 @@ class ProductSuiteTab(QWidget):
         self._save_controls_to_state(state)
         selected_asset_ids = tuple(int(asset.id) for asset in selected_assets)
         catalog_params = self._ai_write_catalog_params()
+        if catalog_params is None:
+            self._message(
+                "AI帮写配置不完整",
+                "默认网关图片理解配置无法读取，请到⑤设置检查后重试。",
+            )
+            return
         cached_models = (
             cmhub_models.cached_model_catalog(catalog_params["base_url"], catalog_params["alias"])
-            if catalog_params is not None
-            else None
         )
         if cached_models is not None:
             self._confirm_ai_write_request(
@@ -4646,9 +4666,6 @@ class ProductSuiteTab(QWidget):
                 self._ai_write_points_cost(cached_models, catalog_params["alias"]),
             )
             return
-        if catalog_params is None:
-            self._confirm_ai_write_request(state, selected_asset_ids, None)
-            return
         self._start_ai_write_catalog_lookup(state, selected_asset_ids, catalog_params)
 
     def _ai_write_selected_assets(self, state):
@@ -5962,6 +5979,7 @@ class ProductSuiteTab(QWidget):
         pull_running = state.pull_running()
         default_gateway = self._is_default_gateway()
         supported_gateway = default_gateway or self._is_direct_gateway()
+        ai_write_config_error = self._ai_write_config_error()
         self.pull_button.setText(
             "正在停止..."
             if pull_running and state.pull_stop_requested
@@ -6018,13 +6036,18 @@ class ProductSuiteTab(QWidget):
             self._refresh_totals(state)
         ai_running = state.ai_worker is not None or state.ai_price_worker is not None
         self.ai_write_button.setEnabled(
-            default_gateway and not ai_running and not generation_running
+            not ai_write_config_error and not ai_running and not generation_running
         )
-        if not default_gateway and not ai_running:
-            self.ai_write_button.setToolTip("商品套图AI帮写仅支持默认网关")
-            self.generate_button.setToolTip("自定义网关生成不计点数，实际费用以服务商为准")
+        if ai_write_config_error and not ai_running:
+            self.ai_write_button.setToolTip(
+                "%s，请到⑤设置配置默认网关的地址、API Key 和图片理解模型"
+                % ai_write_config_error
+            )
         else:
             self.ai_write_button.setToolTip("")
+        if not default_gateway and not ai_running:
+            self.generate_button.setToolTip("自定义网关生成不计点数，实际费用以服务商为准")
+        else:
             self.generate_button.setToolTip("")
         self.ai_cancel_button.setVisible(ai_running)
         self._update_resume_submitted_action(state)

app/gui/tabs/settings.py

@@ -372,7 +372,9 @@ class SettingsTab(QWidget):
         model_detail_layout.addLayout(action_layout)
         model_detail_layout.addWidget(self.test_result_label)
 
-        self.direct_gateway_notice = QLabel("图片理解与商品套图仅支持默认网关。")
+        self.direct_gateway_notice = QLabel(
+            "商品套图使用自定义网关生图；AI帮写仍使用默认网关的图片理解配置。"
+        )
         self.direct_gateway_notice.setObjectName("directGatewayNoticeLabel")
         self.direct_gateway_notice.setStyleSheet("color: #6b7280;")
         self.direct_role_panel = QWidget()

app/gui/workers.py

@@ -525,8 +525,6 @@ class ProductSuiteAiWriteWorker(BaseWorker):
     def execute(self):
         if self.should_cancel():
             return {"cancelled": True}
-        if appconfig.ai_backend(self.config) != "cmhub":
-            raise ValueError("商品套图AI帮写仅支持默认网关，请到⑤设置切换后再使用")
         result = ai.analyze_product_images(
             self.instruction,
             self.context,