feat: Dashboard Frontend – Echte API-Integration

- useDashboardData: Mock-Daten durch API-Calls ersetzt
- fetchStatus/Agents/Operations/ChatMessages/Queue via /api/dashboard/*
- sendChatMessage via POST /api/dashboard/chat/send
- Polling: Status 5s, Chat 3s, Agents/Queue 10s
- Agent Catalog mit static Fields + API-Daten
- ChatPanel direkt mit sendChatMessage verdrahtet
- Build: 0 errors, vue-tsc + vite ✅

frontend/src/views/DashboardView.vue

@@ -13,7 +13,7 @@ const {
   agents, openTasks, feedEntries, chatMessages,
   irisBusy, irisFocus, queue,
   getAgentRuntime, startRuntime, stopRuntime,
-  sendChat, removeQueueItem, moveQueueItem, changeQueuePriority,
+  sendChatMessage, removeQueueItem, moveQueueItem, changeQueuePriority,
 } = useDashboardData()
 
 const selectedAgent = ref<AgentNodeData | null>(null)
@@ -26,8 +26,6 @@ function onAgentSelect(id: string) {
 onMounted(startRuntime)
 onUnmounted(stopRuntime)
 
-function onChatSend(text: string): void { sendChat(text) }
-
 function onQueueMoveUp(id: string): void {
   const idx = queue.value.findIndex(q => q.id === id)
   if (idx > 0) moveQueueItem(idx, idx - 1)
@@ -88,7 +86,7 @@ function onQueueExecuteNow(id: string): void {
       </div>
     </div>
     <div class="col-right">
-      <ChatPanel :messages="chatMessages" :iris-busy="irisBusy" :iris-focus="irisFocus" @send="onChatSend" />
+      <ChatPanel :messages="chatMessages" :iris-busy="irisBusy" :iris-focus="irisFocus" />
       <QueuePanel :items="queue" @remove="removeQueueItem" @move-up="onQueueMoveUp" @move-down="onQueueMoveDown" @change-priority="changeQueuePriority" @execute-now="onQueueExecuteNow" />
     </div>