feat: AI平台适配器（DeepSeek/Kimi/Open余额查询+Minimax骨架）+ capabilities按钮控制，测试17项通过

app/adapters/ai.py

@@ -0,0 +1,110 @@
+"""AI 平台适配器（验证 Key + 余额/用量查询）
+
+各 AI 平台 API 差异较大，此处实现 test_connection（验证 Key，附带余额）
+与 get_account（余额）。余额接口可能随平台调整，填入真实凭证后以实际返回为准。
+所需配置统一为 {"api_key": "..."}（Minimax 另需 group_id）。
+"""
+
+import httpx
+
+from app.adapters.base import AccountInfo, BaseAdapter
+from app.adapters.registry import register
+
+
+class _AIBase(BaseAdapter):
+    """AI 适配器公共逻辑（Bearer Key + JSON GET）"""
+
+    required_config = ["api_key"]
+
+    def _headers(self) -> dict:
+        return {"Authorization": f"Bearer {self.config.get('api_key', '')}"}
+
+    def _get(self, url: str) -> dict:
+        with httpx.Client(timeout=30) as client:
+            resp = client.get(url, headers=self._headers())
+            resp.raise_for_status()
+            return resp.json()
+
+    def _http_error(self, e: httpx.HTTPStatusError) -> dict:
+        return {"ok": False, "message": f"HTTP {e.response.status_code}：API Key 无效或权限不足"}
+
+
+@register("deepseek-api")
+class DeepSeekAdapter(_AIBase):
+    BASE = "https://api.deepseek.com"
+
+    def _balance(self) -> AccountInfo:
+        data = self._get(self.BASE + "/user/balance").get("data", {})
+        try:
+            total = float(data.get("total_balance")) if data.get("total_balance") is not None else None
+        except (TypeError, ValueError):
+            total = None
+        return AccountInfo(balance=total, currency="CNY", raw=data)
+
+    def test_connection(self) -> dict:
+        try:
+            acc = self._balance()
+            return {"ok": True, "message": f"连接成功，余额 {acc.balance} CNY"}
+        except httpx.HTTPStatusError as e:
+            return self._http_error(e)
+        except Exception as e:  # noqa: BLE001
+            return {"ok": False, "message": str(e)}
+
+    def get_account(self) -> AccountInfo:
+        return self._balance()
+
+
+@register("moonshot-api")
+class KimiAdapter(_AIBase):
+    BASE = "https://api.moonshot.cn/v1"
+
+    def _balance(self) -> AccountInfo:
+        data = self._get(self.BASE + "/users/me/balance").get("data", {})
+        return AccountInfo(balance=data.get("available_balance"), currency="CNY", raw=data)
+
+    def test_connection(self) -> dict:
+        try:
+            acc = self._balance()
+            return {"ok": True, "message": f"连接成功，可用余额 {acc.balance} CNY"}
+        except httpx.HTTPStatusError as e:
+            return self._http_error(e)
+        except Exception as e:  # noqa: BLE001
+            return {"ok": False, "message": str(e)}
+
+    def get_account(self) -> AccountInfo:
+        return self._balance()
+
+
+@register("openai-api")
+class OpenAIAdapter(_AIBase):
+    BASE = "https://api.openai.com/v1"
+
+    def test_connection(self) -> dict:
+        try:
+            data = self._get(self.BASE + "/models")
+            count = len(data.get("data", []))
+            return {"ok": True, "message": f"连接成功，可用模型 {count} 个"}
+        except httpx.HTTPStatusError as e:
+            return self._http_error(e)
+        except Exception as e:  # noqa: BLE001
+            return {"ok": False, "message": str(e)}
+
+    def get_account(self) -> AccountInfo:
+        # OpenAI 余额接口需组织级权限，尝试旧版 billing，失败返回空
+        try:
+            data = self._get("https://api.openai.com/dashboard/billing/credit_grants")
+            return AccountInfo(balance=data.get("total_available"), currency="USD", raw=data)
+        except Exception:  # noqa: BLE001
+            return AccountInfo(balance=None, currency="USD", raw={})
+
+
+@register("minimax-api")
+class MinimaxAdapter(_AIBase):
+    # Minimax 需 group_id，余额接口因账号类型而异，此处为骨架待完善
+    required_config = ["api_key", "group_id"]
+    BASE = "https://api.minimax.chat/v1"
+
+    def test_connection(self) -> dict:
+        if not self.config.get("group_id"):
+            return {"ok": False, "message": "Minimax 需配置 group_id（适配器余额接口待完善）"}
+        return {"ok": False, "message": "Minimax 适配器余额接口待完善（请提供具体接口文档）"}