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.sh

@@ -17,38 +17,21 @@ SERVER_DIR="$SCRIPT_DIR/server"
 VENV_DIR="$DIST_DIR/venv"
 APP_DIR="$DIST_DIR/app"
 
+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 "${1:-}"
 TAR_NAME="LedGrab-v${VERSION_CLEAN}-linux-x64.tar.gz"
 
-# 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 "=== Building LedGrab v${VERSION_CLEAN} (Linux) ==="
 echo "  Output: build/$TAR_NAME"
 echo ""
 
 # ── Clean ────────────────────────────────────────────────────
 
-if [ -d "$DIST_DIR" ]; then
-    echo "[1/7] Cleaning previous build..."
-    rm -rf "$DIST_DIR"
-fi
-mkdir -p "$DIST_DIR"
+echo "[1/7] Cleaning..."
+clean_dist
 
 # ── Create virtualenv ────────────────────────────────────────
 
@@ -60,38 +43,25 @@ pip install --upgrade pip --quiet
 # ── Install dependencies ─────────────────────────────────────
 
 echo "[3/7] Installing dependencies..."
-pip install --quiet "${SERVER_DIR}[camera,notifications]" 2>&1 | {
+pip install --quiet "${SERVER_DIR}[notifications]" 2>&1 | {
     grep -i 'error\|failed' || true
 }
 
-# Remove the installed wled_controller package (PYTHONPATH handles app code)
-SITE_PACKAGES="$VENV_DIR/lib/python*/site-packages"
-rm -rf $SITE_PACKAGES/wled_controller* $SITE_PACKAGES/wled*.dist-info 2>/dev/null || true
+# Resolve site-packages path (glob expand)
+SITE_PACKAGES=$(echo "$VENV_DIR"/lib/python*/site-packages)
 
-# Clean up caches
-find "$VENV_DIR" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
-find "$VENV_DIR" -type d -name tests -exec rm -rf {} + 2>/dev/null || true
-find "$VENV_DIR" -type d -name test -exec rm -rf {} + 2>/dev/null || true
+# Clean up with shared function
+cleanup_site_packages "$SITE_PACKAGES" "so" "so"
 
 # ── Build frontend ───────────────────────────────────────────
 
-echo "[4/7] Building frontend bundle..."
-(cd "$SERVER_DIR" && npm ci --loglevel error && npm run build) 2>&1 | {
-    grep -v 'RemoteException' || true
-}
+echo "[4/7] Building frontend..."
+build_frontend
 
 # ── Copy application files ───────────────────────────────────
 
 echo "[5/7] 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
 
 # ── Create launcher ──────────────────────────────────────────