fix: infer model brand name from model prefix instead of provider identifier

All Dify models use openai_api_compatible as provider_name, causing
the frontend to display 'openai_api_compatible' for every model.
Now infers brand (DeepSeek, OpenAI, Google, etc.) from model name
prefix to match Dify admin panel display.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

api/insurance/admin/ppt_admin_service.py

@@ -496,6 +496,28 @@ class PptAdminService:
             return {"code": 0, "data": {"models": dify_models, "source": "dify"}}
         return {"code": 0, "data": {"models": self._BUILTIN_MODELS, "source": "builtin"}}
 
+    # 模型名前缀 → 品牌名映射（Dify 用 openai_api_compatible 统一接口，需要从模型名推断品牌）
+    _MODEL_BRAND_MAP = {
+        "deepseek": "DeepSeek",
+        "gpt": "OpenAI",
+        "o1": "OpenAI",
+        "o3": "OpenAI",
+        "o4": "OpenAI",
+        "claude": "Anthropic",
+        "gemini": "Google",
+        "qwen": "通义千问",
+        "glm": "智谱",
+        "MiniMax": "MiniMax",
+        "moonshot": "月之暗面",
+    }
+
+    def _infer_brand(self, model_name: str) -> str:
+        """从模型名推断品牌名。"""
+        for prefix, brand in self._MODEL_BRAND_MAP.items():
+            if model_name.lower().startswith(prefix.lower()):
+                return brand
+        return "其他"
+
     def _fetch_dify_models(self) -> list | None:
         """从 Dify 数据库直接查询已配置的 LLM 模型列表。"""
         try:
@@ -511,12 +533,11 @@ class PptAdminService:
             for row in rows:
                 model_name = row[0]
                 provider_name = row[1]
-                # 从插件标识中提取简短供应商名
-                short_provider = provider_name.split("/")[-1] if "/" in provider_name else provider_name
+                brand = self._infer_brand(model_name)
                 models.append({
-                    "provider": short_provider,
+                    "provider": brand,
                     "model": model_name,
-                    "label": f"{model_name}",
+                    "label": f"{brand} / {model_name}",
                 })
             return models
         except Exception as e: