test: add Windows npm global install CI test (reproduces #262) (#293)

* test: add Windows npm global install CI test (reproduces #262)

This test packs the package and installs it globally with npm,
then runs agent-browser --version. This reproduces the issue where
npm-generated shims on Windows try to invoke /bin/sh which doesn't exist.

The bin/agent-browser.js wrapper is added but not yet wired up,
so this commit should fail CI to confirm the issue.

* fix: Windows npm global install and npx support

The shell script wrapper (bin/agent-browser) with #!/bin/sh shebang
causes npm to generate Windows shims that try to invoke /bin/sh,
which doesn't exist on Windows.

This fix uses a hybrid approach:

1. Node.js wrapper (bin/agent-browser.js) as bin entry
   - Makes npx work on all platforms
   - ~100ms overhead (acceptable since npx has its own overhead)

2. postinstall patches bin entries for global installs
   - Windows: Overwrites .cmd/.ps1 shims to invoke .exe directly
   - Mac/Linux: Replaces symlink to point to native binary
   - Zero overhead for `npm i -g agent-browser` users on all platforms

Also fixes PowerShell glob expansion in CI test.

Fixes #262

* fix: Windows npm global install and npx support

The shell script wrapper (bin/agent-browser) with #!/bin/sh shebang
causes npm to generate Windows shims that try to invoke /bin/sh,
which doesn't exist on Windows.

This fix uses a hybrid approach:

1. Node.js wrapper (bin/agent-browser.js) as bin entry
   - Makes npx work on all platforms
   - ~100ms overhead (acceptable since npx has its own overhead)

2. postinstall patches bin entries for global installs
   - Windows: Overwrites .cmd/.ps1 shims to invoke .exe directly
   - Mac/Linux: Replaces symlink to point to native binary
   - Zero overhead for `npm i -g agent-browser` users on all platforms

Also adds cross-platform CI tests for npm global install to catch
regressions on all platforms (Ubuntu, macOS, Windows).

Fixes #262

* test global install

* remove dead code

.github/workflows/ci.yml

@@ -138,11 +138,6 @@ jobs:
         run: |
           Copy-Item cli/target/x86_64-pc-windows-msvc/release/agent-browser.exe bin/agent-browser-win32-x64.exe
 
-      - name: Test CMD wrapper works
-        run: |
-          bin\agent-browser.cmd --version
-        shell: cmd
-
       - name: Test agent-browser install command
         run: |
           $env:PATH = "$pwd\bin;$env:PATH"
@@ -198,3 +193,106 @@ jobs:
 
       - name: Run serverless integration test
         run: pnpm exec vitest run test/serverless.test.ts
+
+  global-install:
+    name: Global Install (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    needs: rust
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            binary: agent-browser-linux-x64
+          - os: macos-latest
+            target: aarch64-apple-darwin
+            binary: agent-browser-darwin-arm64
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+            binary: agent-browser-win32-x64.exe
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: pnpm
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Cache Cargo dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            cli/target/
+          key: ${{ runner.os }}-cargo-${{ matrix.target }}-${{ hashFiles('cli/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-${{ matrix.target }}-
+
+      - name: Build Rust CLI
+        run: cargo build --release --manifest-path cli/Cargo.toml --target ${{ matrix.target }}
+
+      - name: Install npm dependencies
+        run: pnpm install
+
+      - name: Build TypeScript
+        run: pnpm build
+
+      - name: Copy CLI binary to bin directory (Unix)
+        if: runner.os != 'Windows'
+        run: cp cli/target/${{ matrix.target }}/release/agent-browser bin/${{ matrix.binary }}
+
+      - name: Copy CLI binary to bin directory (Windows)
+        if: runner.os == 'Windows'
+        run: Copy-Item cli/target/${{ matrix.target }}/release/agent-browser.exe bin/${{ matrix.binary }}
+
+      - name: Test npm global install
+        run: |
+          npm pack
+          npm install -g agent-browser-*.tgz
+          agent-browser --version
+        shell: bash
+
+      - name: Verify symlink points to native binary (Unix)
+        if: runner.os != 'Windows'
+        run: |
+          SYMLINK=$(npm prefix -g)/bin/agent-browser
+          TARGET=$(readlink "$SYMLINK")
+          echo "Symlink: $SYMLINK"
+          echo "Target: $TARGET"
+          if [[ "$TARGET" != *"${{ matrix.binary }}"* ]]; then
+            echo "ERROR: Symlink should point to native binary, not JS wrapper"
+            exit 1
+          fi
+          echo "✓ Symlink correctly points to native binary"
+        shell: bash
+
+      - name: Verify shim points to native binary (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          $shimPath = "$(npm prefix -g)\agent-browser.cmd"
+          $content = Get-Content $shimPath -Raw
+          echo "Shim path: $shimPath"
+          echo "Shim content:"
+          echo $content
+          if ($content -notmatch "agent-browser-win32-x64\.exe") {
+            echo "ERROR: Shim should point to native .exe, not JS wrapper"
+            exit 1
+          }
+          echo "✓ Shim correctly points to native binary"
+        shell: pwsh