Add sdist exclusions and TestPyPI workflow

- Exclude `node_modules/`, `.idea/`, `.claude/`, `.venv/`, `screenshots/`,
  `tmp/`, `*.iml` from sdist (reduces tarball from 103MB to 1.9MB)
- Add `test-release.yml` workflow for TestPyPI publishing via `workflow_dispatch`

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ryan-williams

.github/workflows/test-release.yml

@@ -0,0 +1,51 @@
+name: Test Release to TestPyPI
+
+on:
+  workflow_dispatch:
+
+jobs:
+  test-release:
+    name: Build and Release to TestPyPI
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write  # Required for trusted publishing
+    steps:
+      - uses: actions/checkout@v4
+
+      # Build UI
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 9
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+          cache-dependency-path: ui/pnpm-lock.yaml
+      - name: Build UI
+        run: |
+          cd ui
+          pnpm install --frozen-lockfile
+          pnpm build
+
+      # Build Python package (includes ui/dist as disk_tree/static)
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install uv
+        uses: astral-sh/setup-uv@v4
+      - name: Build wheel
+        run: uv build
+
+      - name: Show build artifacts
+        run: |
+          ls -lh dist/
+          echo "--- Wheel contents ---"
+          python -c "import zipfile; z = zipfile.ZipFile('dist/disk_tree-0.1.0-py3-none-any.whl'); [print(f) for f in z.namelist() if 'static' in f]"
+          echo "--- Tarball size check ---"
+          tar -tzf dist/*.tar.gz | wc -l
+
+      # Publish to TestPyPI using trusted publishing
+      - name: Publish to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/

pyproject.toml

@@ -50,6 +50,17 @@ packages = ["disk_tree"]
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
+[tool.hatch.build.targets.sdist]
+exclude = [
+    ".claude/",
+    ".idea/",
+    ".venv/",
+    "screenshots/",
+    "tmp/",
+    "ui/node_modules/",
+    "*.iml",
+]
+
 [tool.hatch.build.targets.wheel]
 packages = ["src/disk_tree"]