feat(release): build and publish EPUB artifacts per language

Extend the release workflow to build separate EPUB artifacts for en, vi,
and zh in parallel via a matrix job, then publish all built files under
a single GitHub Release. Using fail-fast: false so a failure in one
language does not block releasing the others.

Also refactor build_epub.py to drive language-specific paths, filenames,
and titles from a mapping, and add zh support (title/subtitle + choice).

.github/workflows/release.yml

@@ -7,9 +7,14 @@ on:
 
 jobs:
   build:
+    name: Build EPUB (${{ matrix.lang }})
     runs-on: ubuntu-latest
-    permissions:
-      contents: write
+    strategy:
+      # Don't cancel other languages if one fails — we still want to release
+      # whichever languages built successfully.
+      fail-fast: false
+      matrix:
+        lang: [en, vi, zh]
 
     steps:
       - uses: actions/checkout@v4
@@ -25,11 +30,51 @@ jobs:
       - name: Install Mermaid CLI
         run: npm install -g @mermaid-js/mermaid-cli
 
+      - name: Install Python dependencies
+        run: |
+          uv venv
+          uv pip install -r scripts/requirements-dev.txt
+
       - name: Build EPUB
-        run: uv run scripts/build_epub.py
+        run: |
+          echo '{"args":["--no-sandbox","--disable-setuid-sandbox"]}' > /tmp/puppeteer-ci.json
+          uv run scripts/build_epub.py \
+            --lang ${{ matrix.lang }} \
+            --puppeteer-config /tmp/puppeteer-ci.json
+
+      - name: Upload EPUB artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: epub-${{ matrix.lang }}
+          path: claude-howto-guide*.epub
+          if-no-files-found: error
+          retention-days: 7
+
+  release:
+    name: Publish GitHub Release
+    needs: build
+    # Release even if some language builds failed — we still publish the
+    # artifacts that did build. `needs.build.result != 'cancelled'` guards
+    # against manually cancelled runs.
+    if: ${{ always() && needs.build.result != 'cancelled' }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Download all EPUB artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+          pattern: epub-*
+          merge-multiple: true
+
+      - name: List built artifacts
+        run: ls -lh dist/
 
       - name: Create Release
         uses: softprops/action-gh-release@v2
         with:
-          files: claude-howto-guide.epub
+          files: dist/*.epub
           generate_release_notes: true
+          fail_on_unmatched_files: true

scripts/build_epub.py

@@ -113,6 +113,8 @@ class EPUBConfig:
     vi_subtitle: str = "Làm chủ Claude Code trong một cuối tuần"
     en_title: str = "Claude Code How-To Guide"
     en_subtitle: str = "Master Claude Code in a Weekend"
+    zh_title: str = "Claude Code 使用指南"
+    zh_subtitle: str = "一个周末掌握 Claude Code"
 
     # Cover Settings
     cover_width: int = 600
@@ -1057,8 +1059,11 @@ def main() -> int:
         "--lang",
         type=str,
         default="en",
-        choices=["en", "vi"],
-        help="Language code: 'en' for English, 'vi' for Vietnamese (default: en)",
+        choices=["en", "vi", "zh"],
+        help=(
+            "Language code: 'en' for English, 'vi' for Vietnamese, "
+            "'zh' for Chinese (default: en)"
+        ),
     )
     parser.add_argument(
         "--puppeteer-config",
@@ -1073,17 +1078,16 @@ def main() -> int:
     repo_root = args.root if args.root else Path(__file__).parent.parent
     repo_root = repo_root.resolve()
 
-    # Set language-specific paths and metadata
-    if args.lang == "vi":
-        root = repo_root / "vi"
-        output = args.output or (repo_root / "claude-howto-guide-vi.epub")
-        title = EPUBConfig.vi_title
-        language = "vi"
-    else:
-        root = repo_root
-        output = args.output or (repo_root / "claude-howto-guide.epub")
-        title = EPUBConfig.en_title
-        language = "en"
+    # Set language-specific paths and metadata.
+    # Each entry: (source root, default output filename, title)
+    lang_map: dict[str, tuple[Path, str, str]] = {
+        "en": (repo_root, "claude-howto-guide.epub", EPUBConfig.en_title),
+        "vi": (repo_root / "vi", "claude-howto-guide-vi.epub", EPUBConfig.vi_title),
+        "zh": (repo_root / "zh", "claude-howto-guide-zh.epub", EPUBConfig.zh_title),
+    }
+    root, default_output_name, title = lang_map[args.lang]
+    output = args.output or (repo_root / default_output_name)
+    language = args.lang
 
     root = root.resolve()
     output = output.resolve()