feat(BrandLogo): enhance logo sizing and visibility based on app name visibility

src/components/Sidebar.jsx

@@ -57,7 +57,7 @@ export default function Sidebar({ open, onClose }) {
         <div className="flex flex-col h-full">
           {/* Logo */}
           <div className="flex items-center justify-between h-16 px-4 border-b border-th-border">
-            <BrandLogo size="sm" />
+            <BrandLogo size="sm" className="flex-1 min-w-0" />
             <button
               onClick={onClose}
               className="lg:hidden p-1.5 rounded-lg hover:bg-th-hover text-th-text-s transition-colors"