feat(model-adapter): add remote model selection

- Fetch and normalize OpenAI and Anthropic model lists through the proxy service.
- Add searchable multi-model selection with localized UI and persisted adapter mappings.
- Cover endpoint resolution, authentication, pagination, and response parsing.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/i18n/locales/zh-CN.json

@@ -18,6 +18,7 @@
   "15d124b200ddabed": "模型单次可接受的最大上下文 Token 数。留空时使用默认值。",
   "185aebe19c77425d": "{0}必须是 JSON 对象",
   "18b7312022cd1840": "启动服务",
+  "1afed6a81a2512d2": "选择模型",
   "1baddde657dd2720": "当前出站请求使用系统代理",
   "1bc77f5ab979f4c1": "新增模型配置",
   "1c631615c1d85c9e": "登录 Cursor",
@@ -29,6 +30,7 @@
   "281eb6d08c9960d0": "{0} 的思考预算 Token 必须为正整数",
   "28aeffc70ceb4267": "切换当前界面显示语言，设置会立即生效并保存在本机",
   "2a24519398684ed5": "访问主页",
+  "2c18d5e2d70b45db": "模型前缀",
   "2cd0f3be8738a86c": "取消",
   "2d706f7981b45a7b": "本地配置已保存",
   "2f9daa828907b93f": "删除",
@@ -44,8 +46,10 @@
   "37d23612f78a2e63": "立即重启更新",
   "392d0dceb45998d3": "极高",
   "393df9bb13ea4900": "命中",
+  "3a5040b68abf75f9": "全选",
   "3ab8cc15939f3b5c": "退出登录",
   "3af7e5489e61ea51": "刷新中",
+  "3b2e5f2fba1bcbc7": "请输入接口地址和访问密钥",
   "3c2a9f9901109e75": "{0} 的类型仅支持 OpenAI 或 Anthropic",
   "3d13868593ae4eeb": "界面语言",
   "3d52574ce1500561": "未连接",
@@ -69,6 +73,7 @@
   "58c6b0935a7216da": "打开贡献者主页失败",
   "593a972852ba0004": "Cursor助手｜永久免费｜自定义API",
   "59a2195a01a8b35b": "{0}必须是合法 JSON 对象",
+  "5a5c8318ef649672": "已选择 {0} 项",
   "5aa8f5590c940829": "非缓存输入：{0}",
   "5beb1206c532729f": "单次回复允许生成的最大 Token 数。留空时使用默认值。",
   "5d1687a4a41883fd": "停止中...",
@@ -95,8 +100,10 @@
   "737225e2904673fc": "输出推算：{0}",
   "7520bd50a5ee5471": "停止测试 {0}/{1}",
   "753d8bb0da9913ce": "复制失败",
+  "75b5f4c68c79322c": "请先选择要保存的模型",
   "774d6e1b7cb89751": "默认口径",
   "77c9e582e85583af": "测试失败",
+  "7923d007483ae04c": "没有可保存的模型",
   "7a26bf794e9fb6bf": "仅用于界面展示，便于你区分不同模型。",
   "7b6187c41e88b70c": "测试中...",
   "7bf8e2c07e084d09": "模型编辑",
@@ -106,15 +113,16 @@
   "80296f4aa3f4543b": "缓存读写",
   "81123c56d5d880d0": "访问密钥",
   "8139cb3dd11f5a67": "开启后会把 JSON 对象覆盖到最终请求头。同名请求头以这里为准，值必须是字符串。",
+  "826c0e5a4407befa": "可多选。保存时只会写入选中的模型，每个模型生成一条配置。",
   "83be9cac28873059": "Cursor 控制面账号",
   "8672864e90417138": "最高",
   "86df7ec743047234": "服务运行中",
+  "891bfee3bbe52d3c": "请填写模型标识",
   "899add6275682210": "留空时默认 200000",
   "8a4ef3e48e4e8a5a": "已开启",
   "8c1935935600e336": "模型测试",
   "8cbcf741e727dbf7": "模型配置",
   "8d1de152be6360ce": "有效占比：{0}",
-  "8e2dc7b0d2e8f6f8": "例如：OpenAI - GPT-4.1",
   "8f6f8d979c981ced": "已复制",
   "8f8baf5d18dd0492": "开启后会把 JSON 对象覆盖到 OpenAI 请求体。同名字段以这里为准。OpenAI service_tier 支持 auto、default、flex、scale、priority；priority 可用于高优先级/Fast 类场景。",
   "8faa670b512b6b9b": "打开模型配置",
@@ -160,6 +168,7 @@
   "b571037dc396a00c": "总请求 Token 包含 Prompt 和模型输出。",
   "b765005f69fa971f": "例如：gpt-4.1",
   "b76a22622020f849": "选择接口协议端点。选“自定义路径”时，请在接口地址栏填写完整请求地址（含 /chat/completions 或 /responses 路径后缀），系统会根据末段自动判断协议形态。",
+  "b7ceef2fbfeb4a85": "例如：GPT-5",
   "b870928f8f9a24c4": "接口端点",
   "b90a8ac9c488ce46": "选择语言",
   "ba3c66f90fd11725": "已识别系统代理",
@@ -173,6 +182,7 @@
   "c3d46b387eeadb23": "只会退出 cursor-byok 中的 Cursor 账号，不会退出 Cursor 客户端。是否继续？",
   "c5af02060847d167": "Anthropic adaptive thinking 的思考强度。请求会固定使用新版 thinking.type=adaptive。",
   "c69f5bce63b9f14c": "设置文件夹",
+  "c72d5dc20cd27118": "已选择 {0} / {1} 个模型",
   "c8a52b66651d294c": "退出登录失败",
   "c8c14507b2d37395": "推理强度",
   "c98e118e0a43f078": "模型",
@@ -206,6 +216,7 @@
   "e4c0daa3c4bea691": "感谢 @aike0210 对 Cursor 控制面账号功能的贡献。",
   "e53580f8031f13c0": "请在浏览器完成登录，完成后返回 Cursor 重新打开插件市场",
   "e552c2accdbf5178": "新增模型",
+  "e6943d5cbfb863e0": "正在获取模型...",
   "e6faccfddce722e8": "缓存读取：{0}",
   "e8a0a6053998ebfa": "已经登录",
   "eaffd48cd2ea9f1a": "例如：https://api.anthropic.com",
@@ -218,6 +229,7 @@
   "f3a76d896853c1df": "未命中",
   "f3fae6cccb9004b1": "自定义请求头名称不能为空",
   "f474a4108aba4c4c": "关闭服务",
+  "f4d4bae588c4c0ff": "取消全选",
   "f4f0ead1116b5b62": "启用",
   "f56c6c82203b33f6": "提示",
   "f61e03f047b786d5": "{0} 的最大输出 Token 必须为正整数",