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-nuxt-old/composables/useCart.ts

@@ -0,0 +1,60 @@
+import { useCartStore } from "~/stores/cart";
+import { storeToRefs } from "pinia";
+import type { EquipmentItem } from "~/composables/useEquipment";
+
+/**
+ * Cart composable – wraps the Pinia cart store for convenient use in components.
+ * Provides reactive refs and action methods.
+ */export function useCart() {
+  const store = useCartStore();
+
+  const { items, totalCount, isEmpty, hasItems, apiItems } = storeToRefs(store);
+
+  function addItem(equipment: EquipmentItem): void {
+    store.addItem(equipment);
+  }
+
+  function addItemByFields(item: {
+    equipment_id: number;
+    name: string;
+    rental_price: number | null;
+    image_url: string | null;
+  }): void {
+    store.addItemByFields(item);
+  }
+
+  function removeItem(equipmentId: number): void {
+    store.removeItem(equipmentId);
+  }
+
+  function updateQuantity(equipmentId: number, quantity: number): void {
+    store.updateQuantity(equipmentId, quantity);
+  }
+
+  function incrementQuantity(equipmentId: number): void {
+    store.incrementQuantity(equipmentId);
+  }
+
+  function decrementQuantity(equipmentId: number): void {
+    store.decrementQuantity(equipmentId);
+  }
+
+  function clearCart(): void {
+    store.clearCart();
+  }
+
+  return {
+    items,
+    totalCount,
+    isEmpty,
+    hasItems,
+    apiItems,
+    addItem,
+    addItemByFields,
+    removeItem,
+    updateQuantity,
+    incrementQuantity,
+    decrementQuantity,
+    clearCart,
+  };
+}