fix(ui): address PR #644 review comments

Keyboard accessibility:
- Add role="button", tabIndex, onKeyDown, and aria-label to clickable divs
  in project-status-card, recent-activity-feed, and running-agents-panel

Bug fixes:
- Fix handleActivityClick to use projectPath instead of projectId for
  initializeProject and check result before navigating
- Fix error handling in use-multi-project-status to use data.error string
  directly instead of data.error?.message

Improvements:
- Use GitBranch icon instead of Folder for branch display in running-agents-panel
- Add error logging for failed project loads in overview.ts
- Use type import for FeatureLoader in projects/index.ts
- Add data-testid to mobile Overview button in dashboard-view
- Add locale options for consistent time formatting in overview-view

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/components/views/overview-view.tsx

@@ -501,7 +501,12 @@ export function OverviewView() {
 
             {/* Footer timestamp */}
             <div className="text-center text-xs text-muted-foreground pt-4">
-              Last updated: {new Date(overview.generatedAt).toLocaleTimeString()}
+              Last updated:{' '}
+              {new Date(overview.generatedAt).toLocaleTimeString(undefined, {
+                hour: '2-digit',
+                minute: '2-digit',
+                second: '2-digit',
+              })}
             </div>
           </div>
         )}