chore: remove ccw-litellm UI components (dead code)

The LiteLLM Python bridge was already removed (litellm-client.ts is a
stub). Remove the orphaned frontend components:
- CcwLitellmStatus component and LitellmInstallProgressOverlay
- API functions (checkCcwLitellmStatus, installCcwLitellm, uninstallCcwLitellm)
- React Query hooks (useCcwLitellmStatus, useInstallCcwLitellm, useUninstallCcwLitellm)
- Locale entries (zh/en api-settings.json ccwLitellm section)

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

ccw/frontend/src/locales/en/api-settings.json

@@ -319,51 +319,6 @@
     "deleteError": "Failed to delete CLI settings",
     "toggleError": "Failed to toggle CLI settings"
   },
-  "ccwLitellm": {
-    "title": "CCW-LiteLLM Package",
-    "description": "Manage ccw-litellm Python package installation",
-    "systemPythonMismatch": "Detected ccw-litellm installed in system Python, but not in the CodexLens venv (~/.codexlens/venv). Click Install to install it into the venv.",
-    "status": {
-      "installed": "Installed",
-      "notInstalled": "Not Installed",
-      "version": "Version"
-    },
-    "actions": {
-      "install": "Install",
-      "uninstall": "Uninstall",
-      "refreshStatus": "Refresh Status"
-    },
-    "messages": {
-      "installSuccess": "ccw-litellm installed successfully",
-      "installFailed": "Failed to install ccw-litellm",
-      "uninstallSuccess": "ccw-litellm uninstalled successfully",
-      "uninstallFailed": "Failed to uninstall ccw-litellm"
-    },
-    "install": {
-      "title": "Install CCW-LiteLLM",
-      "description": "Install ccw-litellm into the CodexLens Python virtual environment for embedding support.",
-      "checklist": "What will be installed",
-      "codexlensVenv": "CodexLens Venv",
-      "codexlensVenvDesc": "Ensures CodexLens Python virtual environment is ready",
-      "litellmPackage": "ccw-litellm Package",
-      "litellmPackageDesc": "LiteLLM-based embedding client for multi-provider support",
-      "embeddingSupport": "Embedding Support",
-      "embeddingSupportDesc": "Enables LiteLLM embedding backend for semantic search",
-      "location": "Install Location",
-      "locationPath": "~/.codexlens/venv",
-      "timeEstimate": "Installation may take 1-3 minutes depending on network speed.",
-      "installNow": "Install Now",
-      "installing": "Installing...",
-      "stage": {
-        "checkingVenv": "Checking CodexLens virtual environment...",
-        "detectingPackage": "Detecting ccw-litellm package source...",
-        "installingDeps": "Installing dependencies...",
-        "installingPackage": "Installing ccw-litellm package...",
-        "verifying": "Verifying installation...",
-        "complete": "Installation complete!"
-      }
-    }
-  },
   "common": {
     "save": "Save",
     "cancel": "Cancel",

ccw/frontend/src/locales/zh/api-settings.json

@@ -319,51 +319,6 @@
     "deleteError": "删除 CLI 设置失败",
     "toggleError": "切换 CLI 设置状态失败"
   },
-  "ccwLitellm": {
-    "title": "CCW-LiteLLM 包",
-    "description": "管理 ccw-litellm Python 包安装",
-    "systemPythonMismatch": "检测到 ccw-litellm 已安装在系统 Python 中，但未安装到 CodexLens 虚拟环境（~/.codexlens/venv）里，所以这里显示未安装。点击“安装”即可安装到虚拟环境中。",
-    "status": {
-      "installed": "已安装",
-      "notInstalled": "未安装",
-      "version": "版本"
-    },
-    "actions": {
-      "install": "安装",
-      "uninstall": "卸载",
-      "refreshStatus": "刷新状态"
-    },
-    "messages": {
-      "installSuccess": "ccw-litellm 安装成功",
-      "installFailed": "ccw-litellm 安装失败",
-      "uninstallSuccess": "ccw-litellm 卸载成功",
-      "uninstallFailed": "ccw-litellm 卸载失败"
-    },
-    "install": {
-      "title": "安装 CCW-LiteLLM",
-      "description": "将 ccw-litellm 安装到 CodexLens Python 虚拟环境中以支持嵌入功能。",
-      "checklist": "将要安装的内容",
-      "codexlensVenv": "CodexLens 虚拟环境",
-      "codexlensVenvDesc": "确保 CodexLens Python 虚拟环境就绪",
-      "litellmPackage": "ccw-litellm 包",
-      "litellmPackageDesc": "基于 LiteLLM 的嵌入客户端，支持多提供商",
-      "embeddingSupport": "嵌入支持",
-      "embeddingSupportDesc": "启用 LiteLLM 嵌入后端用于语义搜索",
-      "location": "安装位置",
-      "locationPath": "~/.codexlens/venv",
-      "timeEstimate": "安装可能需要 1-3 分钟，取决于网络速度。",
-      "installNow": "立即安装",
-      "installing": "安装中...",
-      "stage": {
-        "checkingVenv": "正在检查 CodexLens 虚拟环境...",
-        "detectingPackage": "正在检测 ccw-litellm 包来源...",
-        "installingDeps": "正在安装依赖项...",
-        "installingPackage": "正在安装 ccw-litellm 包...",
-        "verifying": "正在验证安装...",
-        "complete": "安装完成！"
-      }
-    }
-  },
   "common": {
     "save": "保存",
     "cancel": "取消",