Simplify search agent activity state

web/static/styles.css

@@ -521,55 +521,83 @@ button {
   padding: 3px 6px;
 }
 
-.agent-steps {
+.agent-activity {
   display: grid;
-  gap: 10px;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  gap: 12px;
+  align-items: center;
+  border: 1px solid var(--line);
+  border-radius: 8px;
+  background: #fbfaf6;
+  padding: 12px;
 }
 
-.agent-step {
-  display: grid;
-  grid-template-columns: 13px 1fr;
-  gap: 10px;
-  align-items: start;
-  color: var(--muted);
-}
-
-.step-dot {
-  width: 9px;
-  height: 9px;
-  margin-top: 6px;
-  border: 1px solid #aab3ad;
+.activity-dot {
+  width: 12px;
+  height: 12px;
   border-radius: 50%;
-  background: #ffffff;
-}
-
-.agent-step strong {
-  display: block;
-  color: #17201d;
-  font-size: 13px;
-}
-
-.agent-step span:last-child {
-  display: block;
-  margin-top: 2px;
-  font-size: 12px;
-  line-height: 1.42;
-}
-
-.agent-step.running .step-dot {
-  border-color: var(--teal);
   background: var(--teal);
-  box-shadow: 0 0 0 5px rgba(13, 118, 111, 0.12);
+  box-shadow: 0 0 0 7px rgba(13, 118, 111, 0.12);
 }
 
-.agent-step.done .step-dot {
-  border-color: var(--green);
+.agent-activity.running .activity-dot {
+  animation: activityPulse 1.5s ease-in-out infinite;
+}
+
+.agent-activity.done .activity-dot {
   background: var(--green);
+  box-shadow: 0 0 0 7px rgba(82, 127, 70, 0.12);
 }
 
-.agent-step.error .step-dot {
-  border-color: var(--coral);
+.agent-activity.error .activity-dot {
   background: var(--coral);
+  box-shadow: 0 0 0 7px rgba(186, 86, 68, 0.12);
+}
+
+.activity-copy {
+  min-width: 0;
+}
+
+.activity-title {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  align-items: baseline;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.activity-title strong {
+  color: #17201d;
+  font-size: 14px;
+}
+
+.activity-detail {
+  margin-top: 3px;
+  color: #4c5550;
+  font-size: 13px;
+  line-height: 1.38;
+  overflow-wrap: anywhere;
+}
+
+.activity-meta {
+  color: var(--muted);
+  font-size: 11px;
+  font-weight: 760;
+  white-space: nowrap;
+}
+
+@keyframes activityPulse {
+  0%,
+  100% {
+    transform: scale(1);
+    box-shadow: 0 0 0 7px rgba(13, 118, 111, 0.1);
+  }
+
+  50% {
+    transform: scale(0.82);
+    box-shadow: 0 0 0 10px rgba(13, 118, 111, 0.18);
+  }
 }
 
 .search-brief h3 {
@@ -885,6 +913,14 @@ button {
     max-width: 100%;
   }
 
+  .agent-activity {
+    grid-template-columns: auto minmax(0, 1fr);
+  }
+
+  .activity-meta {
+    grid-column: 2;
+  }
+
   .route-band,
   .timeline-band {
     margin-top: 12px;