fix(SEC-WEB-26+29): Remove console.log + fix formatTime error handling

- Remove debug console.log from workspaces page and teams page
- Fix formatTime to return "Invalid date" fallback instead of empty string
  when date parsing fails (handles both thrown errors and NaN dates)
- Export formatTime and add unit tests for error handling cases

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/app/settings/workspaces/[id]/teams/page.tsx

@@ -45,8 +45,6 @@ function TeamsPageContent(): ReactElement {
       //   description: newTeamDescription || undefined,
       // });
 
-      console.log("Creating team:", { name: newTeamName, description: newTeamDescription });
-
       // Reset form
       setNewTeamName("");
       setNewTeamDescription("");