ci: add Windows Tauri build workflow on windows-latest

CI 在 windows-latest runner 上原生构建 spike：vite build → cargo build --release
→ WiX MSI + NSIS exe 打包，artifact 直接挂在 workflow run 上下载。

触发：push 到 windows-tauri-spike / main、改动落在 apps/windows-tauri/ 或本
workflow 时；也支持 workflow_dispatch 强制重跑。

Author: baiqing

.github/workflows/windows-tauri-build.yml

@@ -0,0 +1,87 @@
+name: windows-tauri-build
+
+# Windows installer 在 windows-latest runner 上原生构建。
+# Phase 0 spike 没单元测试，所以「build 成功 + 产出可下载的 .msi / .exe」就是测试。
+#
+# 触发条件：
+#   - push 到 windows-tauri-spike 或 main，且改动落在 apps/windows-tauri/ 或本 workflow
+#   - 手动 dispatch（用于强制重跑）
+on:
+  push:
+    branches: [windows-tauri-spike, main]
+    paths:
+      - "apps/windows-tauri/**"
+      - ".github/workflows/windows-tauri-build.yml"
+  pull_request:
+    branches: [main, develop]
+    paths:
+      - "apps/windows-tauri/**"
+      - ".github/workflows/windows-tauri-build.yml"
+  workflow_dispatch: {}
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-windows:
+    name: build (windows-latest)
+    runs-on: windows-latest
+    timeout-minutes: 30
+    defaults:
+      run:
+        working-directory: apps/windows-tauri
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+          cache-dependency-path: apps/windows-tauri/pnpm-lock.yaml
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: x86_64-pc-windows-msvc
+
+      - name: Cache cargo build (src-tauri)
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: apps/windows-tauri/src-tauri -> target
+          shared-key: windows-tauri-spike
+
+      - name: Install frontend dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build (frontend + Tauri Windows bundle)
+        # 这一步串起：vite build -> cargo build --release -> WiX MSI + NSIS exe 打包
+        run: pnpm tauri build
+
+      - name: Inspect build output
+        shell: bash
+        run: |
+          echo "===bundle dir==="
+          ls -la src-tauri/target/release/bundle || true
+          echo "===msi==="
+          ls -la src-tauri/target/release/bundle/msi || true
+          echo "===nsis==="
+          ls -la src-tauri/target/release/bundle/nsis || true
+
+      - name: Upload installer artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: openless-windows-spike-${{ github.sha }}
+          path: |
+            apps/windows-tauri/src-tauri/target/release/bundle/msi/*.msi
+            apps/windows-tauri/src-tauri/target/release/bundle/nsis/*.exe
+          if-no-files-found: error
+          retention-days: 30