feat(quick-pane): promote chats into full sessions

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

@@ -77,6 +77,7 @@ body {
 
 .quick-pane-toolbar {
   flex: 0 0 auto;
+  flex-wrap: nowrap;
   justify-content: space-between;
   gap: 8px;
 }
@@ -88,6 +89,7 @@ body {
 
 .quick-pane-primary-controls {
   flex: 1 1 0;
+  min-width: 0;
 }
 
 .quick-pane-header-actions {
@@ -106,6 +108,7 @@ body {
 
 .quick-pane-model-selector {
   flex: 1 1 0;
+  min-width: 0;
   color: #bbb7b0;
   font-weight: 750;
   letter-spacing: 0.04em;
@@ -180,7 +183,10 @@ body {
 }
 
 .quick-pane-thinking {
-  flex: 0 1 122px;
+  display: grid;
+  flex: 0 0 143px;
+  grid-template-columns: auto minmax(84px, 1fr);
+  gap: 4px;
 }
 
 .quick-pane .compact-label {
@@ -230,36 +236,46 @@ body {
   outline-offset: 2px;
 }
 
-.quick-pane-toolbar-control {
+.quick-pane button.quick-pane-toolbar-control,
+.quick-pane select.quick-pane-toolbar-control,
+.quick-pane .model-trigger.quick-pane-toolbar-control,
+.quick-pane
+  .thinking-selector.thinking-selector
+  select.quick-pane-toolbar-control {
   box-sizing: border-box;
   height: 27px;
-  min-width: 0;
+  min-width: 48px;
   padding: 0 8px;
   border: 1px solid #70522f;
   border-radius: 5px;
   color: #e6e3df;
   background: #353535;
-  font: 500 11px / 1 Inter, ui-sans-serif, system-ui, sans-serif;
+  font:
+    650 11px / 1 Inter,
+    ui-sans-serif,
+    system-ui,
+    sans-serif;
   cursor: pointer;
 }
 
 .quick-pane .model-trigger.quick-pane-toolbar-control,
-.quick-pane .thinking-selector.thinking-selector select.quick-pane-toolbar-control {
+.quick-pane
+  .thinking-selector.thinking-selector
+  select.quick-pane-toolbar-control {
   appearance: auto;
-  background: #353535;
 }
 
-.quick-pane-toolbar-control:hover:not(:disabled) {
+.quick-pane .quick-pane-toolbar-control:hover:not(:disabled) {
   border-color: #d88735;
   background: #44382d;
 }
 
-.quick-pane-toolbar-control:focus-visible {
+.quick-pane .quick-pane-toolbar-control:focus-visible {
   outline: 3px solid #f0a347;
   outline-offset: 2px;
 }
 
-.quick-pane-toolbar-control:disabled {
+.quick-pane .quick-pane-toolbar-control:disabled {
   opacity: 0.58;
   cursor: not-allowed;
 }
@@ -598,7 +614,6 @@ body {
   gap: 4px;
 }
 
-
 .quick-pane-send {
   position: absolute;
   right: 8px;