feat: wire dashboard v2 to backend data

frontend/src/components/dashboard/v2/AgentDetailModal.vue

@@ -160,6 +160,16 @@ const statusColors: Record<string, string> = {
         <div class="m-think">{{ thinkDisplay }}<span class="caret"></span></div>
       </div>
 
+      <div v-if="agent.activity.length" class="m-sec">
+        <h4>Agent Activity</h4>
+        <div class="m-activity">
+          <div v-for="(entry, index) in agent.activity" :key="index" class="m-activity-row">
+            <span class="m-activity-time">{{ entry.time }}</span>
+            <span class="m-activity-text">{{ entry.text }}</span>
+          </div>
+        </div>
+      </div>
+
       <!-- Modell wählen -->
       <div class="m-sec">
         <h4>Modell wählen</h4>
@@ -519,6 +529,35 @@ const statusColors: Record<string, string> = {
 
 @keyframes blink { 50% { opacity: 0; } }
 
+.m-activity {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.m-activity-row {
+  display: grid;
+  grid-template-columns: 72px 1fr;
+  gap: 10px;
+  align-items: start;
+  padding: 10px 12px;
+  border-radius: 12px;
+  background: rgba(124,108,255,.06);
+  border: 1px solid var(--line);
+}
+
+.m-activity-time {
+  font-family: 'JetBrains Mono', monospace;
+  font-size: 10px;
+  color: var(--tx-3);
+}
+
+.m-activity-text {
+  font-size: 12px;
+  line-height: 1.45;
+  color: var(--tx-2);
+}
+
 /* ── Models ──────────────────────────────────── */
 .m-models {
   display: flex;