🎨 Palette: Add accessible labels to icon-only buttons

Co-authored-by: jmbish04 <26469722+jmbish04@users.noreply.github.com>

Author: google-labs-jules[bot]

src/frontend/src/components/LiveOpsConsole.tsx

@@ -186,7 +186,7 @@ export function LiveOpsConsole({ operationId }: LiveOpsConsoleProps) {
                             placeholder="Ask Supervisor..."
                             className="h-8 text-xs bg-zinc-950 border-zinc-700"
                         />
-                        <Button type="submit" size="icon" className="h-8 w-8">
+                        <Button type="submit" size="icon" className="h-8 w-8" aria-label="Send message" title="Send message">
                             <Send className="w-3 h-3" />
                         </Button>
                     </form>

src/frontend/src/components/PlanningCenter.tsx

@@ -225,7 +225,7 @@ function PlanningRoom({ requestId, onBack }: { requestId: string; onBack: () =>
       {/* Header */}
       <div className="flex items-center justify-between p-4 border-b border-[#1f2937] bg-black/20 backdrop-blur-md">
         <div className="flex items-center gap-4">
-          <Button variant="ghost" size="icon" onClick={onBack} className="md:hidden">
+          <Button variant="ghost" size="icon" onClick={onBack} className="md:hidden" aria-label="Go back" title="Go back">
             <ChevronRight className="w-5 h-5 rotate-180" />
           </Button>
           <div className="flex flex-col">

src/frontend/src/components/chat/chat-interface.tsx

@@ -163,7 +163,7 @@ export const ChatInterface: React.FC<ChatInterfaceProps> = ({ apiKey, agentId, r
             <div className="w-80 border-r bg-muted/10 flex flex-col">
                 <div className="p-4 border-b flex items-center justify-between bg-background/50 backdrop-blur">
                     <span className="font-semibold text-sm">Discussions</span>
-                    <Button variant="ghost" size="icon" className="h-8 w-8" onClick={handleCreateThread}>
+                    <Button variant="ghost" size="icon" className="h-8 w-8" onClick={handleCreateThread} aria-label="New thread" title="New thread">
                         <Plus className="h-4 w-4" />
                     </Button>
                 </div>