fix: make sync action tooltip trigger focusable

Wraps the sync button in a focusable trigger when rebase sync is blocked
Preserves the existing sync button behavior and labels
Improves tooltip access for keyboard users

packages/ui/src/components/views/git/SyncActions.tsx

@@ -74,6 +74,7 @@ export const SyncActions: React.FC<SyncActionsProps> = ({
     <div className="inline-flex items-center rounded-[9px] [corner-shape:squircle] supports-[corner-shape:squircle]:rounded-[50px] border border-border/60 bg-[var(--surface-elevated)] overflow-hidden">
       <Tooltip>
         <TooltipTrigger asChild>
+          <span className="inline-flex" tabIndex={blocksRebaseSync ? 0 : undefined}>
             <button
               type="button"
               onClick={handleSync}
@@ -91,6 +92,7 @@ export const SyncActions: React.FC<SyncActionsProps> = ({
               )}
               <span className="whitespace-nowrap tabular-nums">{primaryLabel}</span>
             </button>
+          </span>
         </TooltipTrigger>
         <TooltipContent sideOffset={8}>{tooltipLabel}</TooltipContent>
       </Tooltip>