fix: CI 切换到 MSVC 工具链、添加 eslint.config.js

- Rust: windows-latest 默认 MSVC，无需额外安装 GNU/MinGW
- ESLint: 添加 eslint flat config（js + tseslint + react-hooks）

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -42,14 +42,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: 安装 GNU 工具链
-        run: |
-          rustup toolchain install stable-x86_64-pc-windows-gnu
-          rustup override set stable-x86_64-pc-windows-gnu
-
-      - name: 添加 MinGW 到 PATH
-        run: echo "C:\msys64\mingw64\bin" | Out-File -FilePath $env:GITHUB_PATH -Append
-
       - name: Cargo Check
         run: cargo check
 

.github/workflows/release.yml

@@ -21,14 +21,6 @@ jobs:
 
       - run: npm ci
 
-      - name: 安装 GNU 工具链
-        run: |
-          rustup toolchain install stable-x86_64-pc-windows-gnu
-          rustup override set stable-x86_64-pc-windows-gnu
-
-      - name: 添加 MinGW 到 PATH
-        run: echo "C:\msys64\mingw64\bin" | Out-File -FilePath $env:GITHUB_PATH -Append
-
       - name: Tauri Build
         run: npx tauri build