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/pages/admin.vue

@@ -0,0 +1,47 @@
+<template>
+  <div class="max-w-md mx-auto px-4 py-16">
+    <div class="hms-card p-8">
+      <div class="text-center mb-6">
+        <HmsLogo :size="48" />
+        <h1 class="text-xl font-bold mt-4" style="color: var(--text)">Admin-Login</h1>
+        <p class="text-sm mt-1" style="color: var(--secondary)">Equipment-Sync Verwaltungsbereich</p>
+      </div>
+      <div v-if="loggedIn" class="text-center py-8" role="status">
+        <div class="inline-flex items-center justify-center w-12 h-12 rounded-full mb-3" :style="{ background: 'var(--color-success-bg)', color: 'var(--color-success)' }"><svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/></svg></div>
+        <p class="font-medium" style="color: var(--text)">Eingeloggt</p>
+        <p class="text-xs mt-1" style="color: var(--secondary)">(Prototyp – keine echte Session)</p>
+      </div>
+      <form v-else @submit.prevent="login" novalidate>
+        <div class="space-y-4">
+          <div><label for="admin-user" class="block text-sm font-medium mb-1" style="color: var(--text-muted)">Benutzername</label><input id="admin-user" v-model="username" type="text" class="hms-input" placeholder="admin" :aria-invalid="!!error" /></div>
+          <div><label for="admin-pass" class="block text-sm font-medium mb-1" style="color: var(--text-muted)">Passwort</label><input id="admin-pass" v-model="password" type="password" class="hms-input" placeholder="••••••••" :aria-invalid="!!error" /></div>
+          <p v-if="error" class="text-xs" style="color: var(--color-error)" role="alert">{{ error }}</p>
+          <button type="submit" :disabled="loading" class="hms-btn hms-btn-primary w-full py-3"><span v-if="loading" class="hms-spinner" style="width:18px;height:18px;border-width:2px"></span><span v-else>Einloggen</span></button>
+        </div>
+      </form>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue'
+
+const username = ref('')
+const password = ref('')
+const error = ref('')
+const loading = ref(false)
+const loggedIn = ref(false)
+
+function login() {
+  error.value = ''
+  if (!username.value || !password.value) {
+    error.value = 'Bitte Benutzername und Passwort eingeben'
+    return
+  }
+  loading.value = true
+  setTimeout(() => {
+    loading.value = false
+    loggedIn.value = true
+  }, 1200)
+}
+</script>