feat: 分站 API Key 支持随时查看复制 + 配置文件导出器

- 后端：DistTokenList 去掉 Clean()，返回完整 key 供前端显示
- 前端：Token 列表每行显示完整 key 和复制按钮
- 新增 ConfigExporter 组件，支持 7 种工具配置生成
  (Claude Code / OpenClaw / OpenCode / Cursor / cURL / Python / Anthropic SDK)
- 自动使用分站域名作为 API Base URL
- 中英文 i18n 翻译

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/i18n/locales/en.json

@@ -122,6 +122,19 @@
     "tokens.quickStart": "Quick Start",
     "tokens.quickStartComment": "# Use your API key with OpenAI-compatible endpoint",
 
+    "config.title": "Config File Export",
+    "config.subtitle": "Select your API Key and model to generate config files",
+    "config.selectKey": "Select API Key",
+    "config.selectModel": "Select Model",
+    "config.selectTool": "Select Tool",
+    "config.copy": "Copy",
+    "config.download": "Download",
+    "config.copied": "Copied to clipboard!",
+    "config.downloaded": "Config file downloaded",
+    "config.loading": "Loading...",
+    "config.loginPrompt": "Log in to generate your config",
+    "config.loginDesc": "Select your API Key and model to auto-fill config files",
+
     "pricing.title": "Model Pricing",
     "pricing.subtitle": "Transparent, pay-as-you-go pricing for all available models. Prices shown per 1M tokens.",
     "pricing.searchPlaceholder": "Search models...",

src/i18n/locales/zh.json

@@ -122,6 +122,19 @@
     "tokens.quickStart": "快速开始",
     "tokens.quickStartComment": "# 使用 OpenAI 兼容端点调用 API",
 
+    "config.title": "配置文件导出",
+    "config.subtitle": "选择您的 API Key 和模型，一键生成配置文件",
+    "config.selectKey": "选择 API Key",
+    "config.selectModel": "选择模型",
+    "config.selectTool": "选择工具",
+    "config.copy": "复制",
+    "config.download": "下载",
+    "config.copied": "已复制到剪贴板",
+    "config.downloaded": "配置文件已下载",
+    "config.loading": "加载中...",
+    "config.loginPrompt": "登录后可生成您的专属配置",
+    "config.loginDesc": "选择 API Key 和模型，自动填充到配置文件中",
+
     "pricing.title": "模型定价",
     "pricing.subtitle": "透明的按量付费定价。价格以每百万 token 计。",
     "pricing.searchPlaceholder": "搜索模型...",