feat: board-first orchestration with Gateway Bridge, live-update, and flow-board

- GatewayBridgeController: MCP-artiger Kommando-Adapter für Agent-zu-Backend
- TaskBridgeService + LiveUpdateService: SSE Live-Sync + Bridge-Kommandos
- FlowBoard.vue: Board-first orchestration dashboard panel
- live-sync.ts store + live.ts service: SSE-basierte Live-Updates
- Nullability-Warnung in HealthController.cs gefixt
- nginx.conf: SSE-Proxy + CORS für Bridge-Endpunkte
- .gitignore: pnpm/corepack local caches ausgeschlossen
- docs: architecture-board-first-orchestration.md hinzugefügt
- README: Backend Bridge API dokumentiert

frontend/src/views/TaskBoardView.vue

@@ -17,6 +17,7 @@ import { Plus, X, CalendarDays, Clock3, ExternalLink, Link2, ListChecks, Save, A
 import { useRouter } from 'vue-router'
 import { useAuthStore } from '../stores/auth'
 import { useTaskStore } from '../stores/tasks'
+import { useLiveSyncStore } from '../stores/live-sync'
 
 type BoardTask = ReturnType<typeof flattenBoard>[number]
 
@@ -32,6 +33,7 @@ type TaskFormState = {
 const authStore = useAuthStore()
 const taskStore = useTaskStore()
 const router = useRouter()
+const liveSyncStore = useLiveSyncStore()
 const showCreateModal = ref(false)
 const showDetailPanel = ref(false)
 const showIrisPanel = ref(false)
@@ -215,6 +217,8 @@ function hydrateDetailForm(task: BoardTask | null) {
 const staleCount = computed(() => taskStore.staleTasksList.length)
 const waitingForIrisCount = computed(() => taskStore.waitingForIrisTasks.length)
 const waitingForBaoCount = computed(() => taskStore.waitingForBaoTasks.length)
+const liveModeLabel = computed(() => liveSyncStore.liveIndicatorLabel)
+const liveModeClass = computed(() => `live-pill-${liveSyncStore.connectionHealth}`)
 
 function expectedFromLabel(expected: string | null | undefined): string {
   if (!expected) return ''
@@ -277,6 +281,14 @@ function hasChildTasks(taskId: string): boolean {
   return allBoardTasks.value.some(task => task.parentTaskId === taskId)
 }
 
+function delegationBadge(task: BoardTask): string | null {
+  if (task.childTaskCount && task.openChildTaskCount) return `${task.openChildTaskCount}/${task.childTaskCount} aktiv`
+  if (task.childTaskCount) return `${task.childTaskCount} Child-Tasks`
+  if (task.parentTaskId) return 'Child-Task'
+  if (task.isAgentTask || task.hasVisibleDelegation) return 'delegiert'
+  return null
+}
+
 function assigneeLabel(assignedTo: string | null | undefined): string {
   return expectedFromLabel(assignedTo)
 }
@@ -382,12 +394,14 @@ watch(showDetailPanel, (open) => {
 })
 
 /* ── Lifecycle ────────────────────────────────────── */
+let agentOverviewInterval: ReturnType<typeof setInterval> | null = null
+
 onMounted(() => {
   taskStore.startBoardPolling()
   taskStore.fetchAgentOverview()
+  liveSyncStore.connect()
   window.addEventListener('keydown', onGlobalKeydown)
-  // Refresh agent overview on the same interval
-  setInterval(() => taskStore.fetchAgentOverview(), 30000)
+  agentOverviewInterval = setInterval(() => taskStore.fetchAgentOverview(), 30000)
 })
 
 onBeforeUnmount(() => {
@@ -396,6 +410,8 @@ onBeforeUnmount(() => {
 
 onUnmounted(() => {
   taskStore.stopBoardPolling()
+  liveSyncStore.disconnect()
+  if (agentOverviewInterval) clearInterval(agentOverviewInterval)
   window.removeEventListener('keydown', onGlobalKeydown)
 })
 </script>
@@ -406,6 +422,10 @@ onUnmounted(() => {
       <div>
         <h1><span class="grad-text">Aufgaben</span></h1>
         <p class="board-subtitle">Task Board — Übersicht aller Arbeitspakete</p>
+        <div class="board-live-row">
+          <span class="live-pill" :class="liveModeClass">{{ liveModeLabel }}</span>
+          <span v-if="liveSyncStore.lastEventAt" class="live-meta">Letztes Event {{ relativeTime(liveSyncStore.lastEventAt) }}</span>
+        </div>
       </div>
       <div class="board-header-actions">
         <button
@@ -546,6 +566,9 @@ onUnmounted(() => {
               <span v-if="task.expectedFrom" class="expected-badge" :title="'Erwartet: ' + task.expectedFrom">
                 ⏳ {{ task.expectedFrom }}
               </span>
+              <span v-if="delegationBadge(task)" class="expected-badge expected-badge--delegation" title="Sichtbare Delegation im Board">
+                ↳ {{ delegationBadge(task) }}
+              </span>
               <span
                 v-if="task.assignedTo"
                 class="assignee"
@@ -595,6 +618,9 @@ onUnmounted(() => {
               <span v-if="task.expectedFrom" class="expected-badge" :title="'Erwartet: ' + task.expectedFrom">
                 ⏳ {{ task.expectedFrom }}
               </span>
+              <span v-if="delegationBadge(task)" class="expected-badge expected-badge--delegation" title="Sichtbare Delegation im Board">
+                ↳ {{ delegationBadge(task) }}
+              </span>
               <span
                 v-if="task.assignedTo"
                 class="assignee"
@@ -644,6 +670,9 @@ onUnmounted(() => {
               <span v-if="task.expectedFrom" class="expected-badge" :title="'Erwartet: ' + task.expectedFrom">
                 ⏳ {{ task.expectedFrom }}
               </span>
+              <span v-if="delegationBadge(task)" class="expected-badge expected-badge--delegation" title="Sichtbare Delegation im Board">
+                ↳ {{ delegationBadge(task) }}
+              </span>
               <span
                 v-if="task.assignedTo"
                 class="assignee"
@@ -737,6 +766,9 @@ onUnmounted(() => {
               <span v-if="task.expectedFrom" class="expected-badge" :title="'Erwartet: ' + task.expectedFrom">
                 ⏳ {{ task.expectedFrom }}
               </span>
+              <span v-if="delegationBadge(task)" class="expected-badge expected-badge--delegation" title="Sichtbare Delegation im Board">
+                ↳ {{ delegationBadge(task) }}
+              </span>
               <span
                 v-if="task.assignedTo"
                 class="assignee"
@@ -837,6 +869,7 @@ onUnmounted(() => {
                   <span v-if="selectedTask.isAgentTask" class="meta-agent-tag">🤖 Agent-Task</span>
                   <span v-if="selectedTask.expectedFrom" class="meta-expected">⏳ Erwartet: {{ selectedTask.expectedFrom }}</span>
                   <span v-if="selectedTask.parentTaskId" class="meta-expected">↳ Child-Task</span>
+                  <span v-if="delegationBadge(selectedTask)" class="meta-expected">↳ {{ delegationBadge(selectedTask) }}</span>
                   <span><Clock3 :size="13" /> Aktualisiert {{ formatDate(selectedTask.updatedAt, true) }}</span>
                   <span><CalendarDays :size="13" /> Erstellt {{ formatDate(selectedTask.createdAt) }}</span>
                   <span v-if="selectedTask.isAgentTask"><MessageSquareText :size="13" /> Letzter Status {{ relativeTime(selectedTask.lastActivityAt ?? selectedTask.updatedAt) }}</span>