Cross-platform support: Windows build target and CI release workflow

- Normalize watcher paths to forward slashes (Windows events use
  backslashes; all sync maps are '/'-keyed), path.delimiter for
  PATH/TEXINPUTS, dirname() instead of '/'-substring splits, bridge log
  in os.tmpdir()
- Platform-aware TeX search paths (TeX Live / MiKTeX on Windows),
  terminal shell default (COMSPEC/powershell), native window frame off
  macOS
- electron-builder: NSIS target + win icon + GitHub publish provider
- GitHub Actions workflow builds the Windows installer on tag push
  (node-pty needs MSVC — cannot cross-compile from macOS) and attaches
  it to the release

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/.github/workflows/release-windows.yml b/.github/workflows/release-windows.yml
new file mode 100644
index 0000000..fb557a5
--- /dev/null
+++ b/.github/workflows/release-windows.yml
@@ -0,0 +1,34 @@
+# Builds the Windows installer on a Windows runner (node-pty must be
+# compiled with MSVC, which cannot be cross-compiled from macOS) and
+# attaches it to the GitHub release for the pushed tag.
+name: Release (Windows)
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Package and publish Windows installer
+        run: npx electron-builder --win --publish always
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}