Fix Studio model picker toolbar overflow (#7403)

* fix(studio): contain model picker toolbar

* fix(studio): preserve model picker tab icons

studio/frontend/src/features/model-picker/components/model-selector.tsx

@@ -301,12 +301,12 @@ const HUB_SECTION_TABS: { value: string; label: string; icon?: ReactNode }[] = [
   {
     value: "recommended",
     label: "Recommended",
-    icon: <HugeiconsIcon icon={StarIcon} className="size-3.5" />,
+    icon: <HugeiconsIcon icon={StarIcon} className="size-3.5 shrink-0" />,
   },
   {
     value: "downloaded",
     label: "On Device",
-    icon: <HugeiconsIcon icon={Download01Icon} className="size-3.5" />,
+    icon: <HugeiconsIcon icon={Download01Icon} className="size-3.5 shrink-0" />,
   },
 ];
 
@@ -384,7 +384,9 @@ function ModelSelectorContent({
             {
               value: "connected",
               label: "Connected",
-              icon: <HugeiconsIcon icon={CloudIcon} className="size-3.5" />,
+              icon: (
+                <HugeiconsIcon icon={CloudIcon} className="size-3.5 shrink-0" />
+              ),
             },
           ]
         : HUB_SECTION_TABS,

studio/frontend/src/features/model-picker/components/model-selector/pickers.tsx

@@ -3064,13 +3064,18 @@ export function HubModelPicker({
           ) : null}
         </div>
 
-        {/* Section tabs then the format and sort dropdowns, packed left with one
-          uniform gap between every control. The box is sized so the last
-          dropdown still lands on Search Hub's edge. Dropdowns hide on Connected. */}
-        <div className="flex items-center gap-2">
+        {/* Keep the left-packed controls on one line while they fit, then wrap
+          whole groups before their intrinsic widths cross the picker edge.
+          Dropdowns hide on Connected. */}
+        <div
+          className={cn(
+            "flex flex-wrap items-center gap-2",
+            hasConnected ? "-mr-4" : "-mr-2",
+          )}
+        >
           {sectionToggle}
           {showConnected ? null : (
-            <div className="flex items-center gap-2">
+            <div className="flex max-w-full min-w-0 flex-wrap items-center gap-2">
               <HubOptionMenu
                 value={formatFilter}
                 options={FORMAT_FILTER_OPTIONS}

studio/frontend/src/features/model-picker/components/model-selector/pill-tabs.tsx

@@ -29,7 +29,8 @@ export function PillTabs({
   className?: string;
   compact?: boolean;
   /** Size each tab to its label instead of equal widths. The active tab carries
-   * the pill background directly (the toggle never animates). */
+   * the pill background directly (the toggle never animates). Tabs only shrink
+   * when their combined intrinsic width exceeds the available space. */
   fit?: boolean;
 }) {
   const activeIndex = Math.max(
@@ -84,7 +85,7 @@ export function PillTabs({
           onClick={() => onValueChange(tab.value)}
           className={cn(
             "relative z-10 inline-flex items-center justify-center gap-1.5 rounded-full transition-colors",
-            fit ? "shrink-0" : "min-w-0 flex-1",
+            fit ? "min-w-0 shrink" : "min-w-0 flex-1",
             compact ? "h-7 px-2.5 text-ui-11" : "h-9 px-3 text-ui-12p5",
             value === tab.value
               ? "text-foreground"
@@ -97,7 +98,7 @@ export function PillTabs({
           )}
         >
           {tab.icon}
-          {tab.label}
+          <span className="min-w-0 truncate">{tab.label}</span>
         </button>
       ))}
     </div>

tests/studio/test_model_picker_contracts.py

@@ -217,6 +217,24 @@ def test_local_picker_rows_require_chat_capability():
     assert "row.capabilities.canChat" in memo.group(0)
 
 
+def test_model_picker_toolbar_reflows_before_crossing_picker_edge():
+    """The content-sized section tabs and fixed-width dropdowns must reflow,
+    while an oversized tab group must shrink labels but preserve its icons."""
+    picker = _read("features/model-picker/components/model-selector/pickers.tsx")
+    assert '"flex flex-wrap items-center gap-2"' in picker
+    assert 'hasConnected ? "-mr-4" : "-mr-2"' in picker
+    assert '"flex max-w-full min-w-0 flex-wrap items-center gap-2"' in picker
+
+    tabs = _read("features/model-picker/components/model-selector/pill-tabs.tsx")
+    assert 'fit ? "min-w-0 shrink" : "min-w-0 flex-1"' in tabs
+    assert '<span className="min-w-0 truncate">{tab.label}</span>' in tabs
+
+    selector = _read("features/model-picker/components/model-selector.tsx")
+    assert 'icon={StarIcon} className="size-3.5 shrink-0"' in selector
+    assert 'icon={Download01Icon} className="size-3.5 shrink-0"' in selector
+    assert 'icon={CloudIcon} className="size-3.5 shrink-0"' in selector
+
+
 def test_native_picked_gguf_template_read_through_lease():
     """A native (picked / drag-drop) GGUF's path lives only in its signed lease,
     and the picker chat-template GET has no lease plumbing, so the default