fix nits

Author: sawka

frontend/app/tab/tabbar.tsx

@@ -692,7 +692,7 @@ const TabBar = memo(({ workspace, noTabs }: TabBarProps) => {
                     className="tabs-wrapper"
                     ref={tabsWrapperRef}
                     style={{
-                        width: `${tabsWrapperWidth}px`,
+                        width: noTabs ? 0 : tabsWrapperWidth,
                         ...(noTabs ? ({ WebkitAppRegion: "drag" } as React.CSSProperties) : {}),
                     }}
                 >

frontend/app/workspace/workspace.tsx

@@ -58,6 +58,8 @@ const WorkspaceElem = memo(() => {
     const panelContainerRef = useRef<HTMLDivElement>(null);
     const aiPanelWrapperRef = useRef<HTMLDivElement>(null);
 
+    // showLeftTabBar is passed as a seed value only; subsequent changes are handled by setShowLeftTabBar below.
+    // Do NOT add showLeftTabBar as a dep here — re-registering refs on config changes would redundantly re-run commitLayouts.
     useEffect(() => {
         if (
             aiPanelRef.current &&