feat: reduce build size — replace Pillow with cv2, refactor build scripts

- Create utils/image_codec.py with cv2-based image helpers
- Replace PIL usage across all routes, filters, and engines with cv2
- Move Pillow from core deps to [tray] optional in pyproject.toml
- Extract shared build logic into build-common.sh (detect_version, cleanup, etc.)
- Strip unused NumPy/PIL/zeroconf/debug files in build scripts

build-dist-windows.sh

@@ -22,27 +22,13 @@ PYTHON_DIR="$DIST_DIR/python"
 APP_DIR="$DIST_DIR/app"
 PYTHON_VERSION="${PYTHON_VERSION:-3.11.9}"
 
+source "$SCRIPT_DIR/build-common.sh"
+
 # ── Version detection ────────────────────────────────────────
 
-VERSION="${1:-}"
-
-if [ -z "$VERSION" ]; then
-    VERSION=$(git describe --tags --exact-match 2>/dev/null || true)
-fi
-if [ -z "$VERSION" ]; then
-    VERSION="${GITEA_REF_NAME:-${GITHUB_REF_NAME:-}}"
-fi
-if [ -z "$VERSION" ]; then
-    VERSION=$(grep -oP '^version\s*=\s*"\K[^"]+' "$SERVER_DIR/pyproject.toml" 2>/dev/null || echo "0.0.0")
-fi
-
-VERSION_CLEAN="${VERSION#v}"
+detect_version "${1:-}"
 ZIP_NAME="LedGrab-v${VERSION_CLEAN}-win-x64.zip"
 
-# Stamp the resolved version into pyproject.toml so that
-# importlib.metadata reads the correct value at runtime.
-sed -i "s/^version = .*/version = \"${VERSION_CLEAN}\"/" "$SERVER_DIR/pyproject.toml"
-
 echo "=== Cross-building LedGrab v${VERSION_CLEAN} (Windows from Linux) ==="
 echo "  Embedded Python: $PYTHON_VERSION"
 echo "  Output: build/$ZIP_NAME"
@@ -50,11 +36,8 @@ echo ""
 
 # ── Clean ────────────────────────────────────────────────────
 
-if [ -d "$DIST_DIR" ]; then
-    echo "[1/9] Cleaning previous build..."
-    rm -rf "$DIST_DIR"
-fi
-mkdir -p "$DIST_DIR"
+echo "[1/9] Cleaning..."
+clean_dist
 
 # ── Download Windows embedded Python ─────────────────────────
 
@@ -195,15 +178,11 @@ WHEEL_DIR="$BUILD_DIR/win-wheels"
 mkdir -p "$WHEEL_DIR"
 
 # Core dependencies (cross-platform, should have win_amd64 wheels)
-# We parse pyproject.toml deps and download win_amd64 wheels.
-# For packages that are pure Python, --only-binary will fail,
-# so we fall back to allowing source for those.
 DEPS=(
     "fastapi>=0.115.0"
     "uvicorn[standard]>=0.32.0"
     "httpx>=0.27.2"
     "mss>=9.0.2"
-    "Pillow>=10.4.0"
     "numpy>=2.1.3"
     "pydantic>=2.9.2"
     "pydantic-settings>=2.6.0"
@@ -220,7 +199,6 @@ DEPS=(
     "sounddevice>=0.5"
     "aiomqtt>=2.0.0"
     "openrgb-python>=0.2.15"
-    # camera extra
     "opencv-python-headless>=4.8.0"
 )
 
@@ -232,8 +210,9 @@ WIN_DEPS=(
     "winrt-Windows.Foundation>=3.0.0"
     "winrt-Windows.Foundation.Collections>=3.0.0"
     "winrt-Windows.ApplicationModel>=3.0.0"
-    # System tray
+    # System tray (Pillow needed by pystray for tray icon)
     "pystray>=0.19.0"
+    "Pillow>=10.4.0"
 )
 
 # Download cross-platform deps (prefer binary, allow source for pure Python)
@@ -286,73 +265,26 @@ for sdist in "$WHEEL_DIR"/*.tar.gz; do
 done
 
 # ── Reduce package size ────────────────────────────────────────
-echo "  Cleaning up to reduce size..."
 
-# Remove caches, tests, docs, type stubs
-find "$SITE_PACKAGES" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
-find "$SITE_PACKAGES" -type d -name tests -exec rm -rf {} + 2>/dev/null || true
-find "$SITE_PACKAGES" -type d -name test -exec rm -rf {} + 2>/dev/null || true
-find "$SITE_PACKAGES" -type d -name "*.dist-info" -exec rm -rf {} + 2>/dev/null || true
-find "$SITE_PACKAGES" -name "*.pyi" -delete 2>/dev/null || true
+cleanup_site_packages "$SITE_PACKAGES" "pyd" "dll"
 
-# Remove pip and setuptools (not needed at runtime)
-rm -rf "$SITE_PACKAGES"/pip "$SITE_PACKAGES"/pip-* 2>/dev/null || true
-rm -rf "$SITE_PACKAGES"/setuptools "$SITE_PACKAGES"/setuptools-* "$SITE_PACKAGES"/pkg_resources 2>/dev/null || true
-rm -rf "$SITE_PACKAGES"/_distutils_hack 2>/dev/null || true
-
-# Remove pythonwin GUI IDE and help file (ships with pywin32 but not needed)
+# Windows-specific cleanup
 rm -rf "$SITE_PACKAGES"/pythonwin 2>/dev/null || true
 rm -f "$SITE_PACKAGES"/PyWin32.chm 2>/dev/null || true
-
-# OpenCV: remove ffmpeg DLL (28MB, only for video file I/O, not camera),
-# Haar cascades (2.6MB), and misc dev files
-CV2_DIR="$SITE_PACKAGES/cv2"
-if [ -d "$CV2_DIR" ]; then
-    rm -f "$CV2_DIR"/opencv_videoio_ffmpeg*.dll 2>/dev/null || true
-    rm -rf "$CV2_DIR/data" "$CV2_DIR/gapi" "$CV2_DIR/misc" "$CV2_DIR/utils" 2>/dev/null || true
-    rm -rf "$CV2_DIR/typing_stubs" "$CV2_DIR/typing" 2>/dev/null || true
-fi
-
-# numpy: remove tests, f2py, typing stubs
-rm -rf "$SITE_PACKAGES/numpy/tests" "$SITE_PACKAGES/numpy/*/tests" 2>/dev/null || true
-rm -rf "$SITE_PACKAGES/numpy/f2py" 2>/dev/null || true
-rm -rf "$SITE_PACKAGES/numpy/typing" 2>/dev/null || true
-rm -rf "$SITE_PACKAGES/numpy/_pyinstaller" 2>/dev/null || true
-
-# Pillow: remove unused image plugins' test data
-rm -rf "$SITE_PACKAGES/PIL/tests" 2>/dev/null || true
-
-# winrt: remove type stubs
 find "$SITE_PACKAGES/winrt" -name "*.pyi" -delete 2>/dev/null || true
 
-# Remove wled_controller if it got installed
-rm -rf "$SITE_PACKAGES"/wled_controller* "$SITE_PACKAGES"/wled*.dist-info 2>/dev/null || true
-
-CLEANED_SIZE=$(du -sh "$SITE_PACKAGES" | cut -f1)
-echo "  Site-packages after cleanup: $CLEANED_SIZE"
-
 WHEEL_COUNT=$(ls "$WHEEL_DIR"/*.whl 2>/dev/null | wc -l)
 echo "  Installed $WHEEL_COUNT packages"
 
 # ── Build frontend ───────────────────────────────────────────
 
-echo "[7/9] Building frontend bundle..."
-(cd "$SERVER_DIR" && npm ci --loglevel error && npm run build) 2>&1 | {
-    grep -v 'RemoteException' || true
-}
+echo "[7/9] Building frontend..."
+build_frontend
 
 # ── Copy application files ───────────────────────────────────
 
 echo "[8/9] Copying application files..."
-mkdir -p "$APP_DIR"
-
-cp -r "$SERVER_DIR/src" "$APP_DIR/src"
-cp -r "$SERVER_DIR/config" "$APP_DIR/config"
-mkdir -p "$DIST_DIR/data" "$DIST_DIR/logs"
-
-# Clean up source maps and __pycache__
-find "$APP_DIR" -name "*.map" -delete 2>/dev/null || true
-find "$APP_DIR" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
+copy_app_files
 
 # Pre-compile Python bytecode for faster startup
 echo "  Pre-compiling Python bytecode..."