feat: add MCP server with resources, tools, auth, and Traefik routing

- Add backend/app/mcp_server.py with FastMCP server (hms-cms)
- Resources: design-rules, page-structure, sync-status
- Tools: trigger_sync, get_sync_log, set_rentman_token, read_file,
  write_file, create_page, deploy, git_commit, git_status
- Bearer token auth via MCP_AUTH_TOKEN env var
- Mount MCP at /mcp with streamable HTTP transport
- Integrate session manager in FastAPI lifespan
- Add Traefik labels for external /mcp route on hms.media-on.de
- Add git, docker.io, curl to backend Dockerfile
- Mount repo root + docker socket in backend container
- Add mcp>=1.0.0 to requirements.txt

frontend/public/favicon.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200">
+  <path fill="#ffffff" d="M166.266,172.872h-37.687v-60.718H74.226v60.718H36.539V26.956h37.687v56.335h54.354V26.956h37.687V172.872z" />
+  <rect x="23.598" y="15.343" fill="none" stroke="#FA5C01" stroke-width="15.1525" stroke-miterlimit="10" width="155.612" height="168.874" />
+</svg>

frontend/public/logo.svg

@@ -1,9 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="Ebene_1" x="0px" y="0px" width="200px" height="200px" viewBox="0 0 200 200" xml:space="preserve">
-<g>
-	<g>
-		<path fill="#FFFFFF" d="M166.266,172.872h-37.687v-60.718H74.226v60.718H36.539V26.956h37.687v56.335h54.354V26.956h37.687    V172.872z"></path>
-	</g>
-	
-		<rect x="23.598" y="15.343" fill="none" stroke="#EC6925" stroke-width="15.1525" stroke-miterlimit="10" width="155.612" height="168.874"></rect>
-</g>
-</svg>

frontend/public/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /