feat(quick-pane): add compact runtime controls

ui/src/quick-pane/quick-pane.css

@@ -18,6 +18,7 @@ body {
 }
 
 .quick-pane {
+  position: relative;
   box-sizing: border-box;
   display: flex;
   flex-direction: column;
@@ -53,7 +54,12 @@ body {
   cursor: move;
   touch-action: none;
   border-bottom: 1px solid #70522f;
-  background: linear-gradient(90deg, transparent, rgba(240, 163, 71, 0.14), transparent);
+  background: linear-gradient(
+    90deg,
+    transparent,
+    rgba(240, 163, 71, 0.14),
+    transparent
+  );
 }
 
 .quick-pane-drag-strip::after {
@@ -107,13 +113,43 @@ body {
   text-transform: uppercase;
 }
 
-.quick-pane-model-loading {
-  flex: 0 0 auto;
+.quick-pane-catalog-overlay {
+  position: absolute;
+  z-index: 10;
+  inset: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 24px;
   color: #f1e4d1;
-  font-size: 11px;
+  background: rgba(34, 34, 34, 0.98);
+  border-radius: inherit;
   font-weight: 750;
 }
 
+.quick-pane-catalog-overlay p {
+  max-width: 440px;
+  margin: 0;
+  text-align: center;
+}
+
+.quick-pane-catalog-spinner {
+  width: 22px;
+  height: 22px;
+  border: 3px solid rgba(240, 163, 71, 0.28);
+  border-top-color: #f0a347;
+  border-radius: 50%;
+  animation: quick-pane-catalog-spin 0.8s linear infinite;
+}
+
+@keyframes quick-pane-catalog-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 .quick-pane .model-trigger {
   height: 27px;
   border: 0;
@@ -299,6 +335,22 @@ body {
   margin-bottom: 0;
 }
 
+.quick-pane-assistant-elapsed,
+.quick-pane-assistant-activity {
+  display: block;
+  margin-top: 6px;
+  color: #96918b;
+  font-size: 10px;
+}
+
+.quick-pane-assistant-elapsed {
+  font-variant-numeric: tabular-nums;
+}
+
+.quick-pane-assistant-activity {
+  color: #c5beb5;
+}
+
 .quick-pane-assistant-footer {
   margin-top: 8px;
   border-top: 1px solid #484848;