fix: update release description to match current build artifacts

Add Windows installer, Docker volume mount, and first-time setup
instructions to the Gitea release body. Fix Docker registry URL.
Add CI/Release sync rule to CLAUDE.md.

.gitea/workflows/release.yml

@@ -25,13 +25,49 @@ jobs:
             IS_PRE="true"
           fi
 
+          # Build registry path for Docker instructions
+          SERVER_HOST=$(echo "${{ gitea.server_url }}" | sed -E 's|https?://||')
+          REPO=$(echo "${{ gitea.repository }}" | tr '[:upper:]' '[:lower:]')
+          DOCKER_IMAGE="${SERVER_HOST}/${REPO}"
+
+          # Build release body
+          BODY=$(cat <<BODY_EOF
+## Downloads
+
+| Platform | File | Description |
+|----------|------|-------------|
+| Windows (installer) | \`LedGrab-${TAG}-setup.exe\` | Install with Start Menu shortcut, optional autostart, uninstaller |
+| Windows (portable) | \`LedGrab-${TAG}-win-x64.zip\` | Unzip anywhere → run \`LedGrab.bat\` |
+| Linux | \`LedGrab-${TAG}-linux-x64.tar.gz\` | Extract → run \`./run.sh\` |
+| Docker | See below | \`docker pull\` → \`docker run\` |
+
+After starting, open **http://localhost:8080** in your browser.
+
+### Docker
+
+\`\`\`bash
+docker pull ${DOCKER_IMAGE}:${TAG}
+docker run -d --name ledgrab -p 8080:8080 -v ledgrab-data:/app/data ${DOCKER_IMAGE}:${TAG}
+\`\`\`
+
+### First-time setup
+
+1. Change the default API key in \`config/default_config.yaml\` or set \`WLED_AUTH__API_KEYS='["your-secret-key"]'\`
+2. Open http://localhost:8080 and discover your WLED devices
+3. See [INSTALLATION.md](INSTALLATION.md) for detailed configuration
+BODY_EOF
+          )
+
+          # Escape body for JSON
+          BODY_JSON=$(echo "$BODY" | python3 -c "import sys,json; print(json.dumps(sys.stdin.read()))")
+
           RELEASE=$(curl -s -X POST "$BASE_URL/releases" \
             -H "Authorization: token $GITEA_TOKEN" \
             -H "Content-Type: application/json" \
             -d "{
               \"tag_name\": \"$TAG\",
               \"name\": \"LedGrab $TAG\",
-              \"body\": \"## Downloads\\n\\n| Platform | File | How to run |\\n|----------|------|------------|\\n| Windows | \`LedGrab-${TAG}-win-x64.zip\` | Unzip → run \`LedGrab.bat\` → open http://localhost:8080 |\\n| Linux | \`LedGrab-${TAG}-linux-x64.tar.gz\` | Extract → run \`./run.sh\` → open http://localhost:8080 |\\n| Docker | See below | \`docker pull\` → \`docker run\` |\\n\\n### Docker\\n\\n\`\`\`bash\\ndocker pull ${{ gitea.server_url }}/${{ gitea.repository }}:${TAG}\\ndocker run -d -p 8080:8080 ${{ gitea.server_url }}/${{ gitea.repository }}:${TAG}\\n\`\`\`\",
+              \"body\": $BODY_JSON,
               \"draft\": false,
               \"prerelease\": $IS_PRE
             }")