Show who created each schedule and start with your own

Org admins see every Express schedule in the organization, so a shared
organization mixed everyone's schedules together. The Schedule page now
shows "Created by …" on each one and, when others' schedules are listed,
switches between Mine and Everyone in the organization.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/Icon.tsx

@@ -23,6 +23,7 @@ const paths: Record<string, string> = {
   sidebar: '<rect x="3" y="4" width="18" height="16" rx="2"/><path d="M9 4v16"/>',
   'chevron-updown': '<path d="m8 9 4-4 4 4M8 15l4 4 4-4"/>',
   logout:'<path d="M10 4H4v16h6M10 12h11m-4-4 4 4-4 4"/>',
+  user: '<circle cx="12" cy="8" r="4"/><path d="M4 21c1-4 4-6 8-6s7 2 8 6"/>',
   plus: '<path d="M12 4v16M4 12h16"/>',
   trash: '<path d="M3 6h18M9 3h6l1 3M6 6l1 15h10l1-15M10 10v7M14 10v7"/>',
   video: '<rect x="3" y="5" width="18" height="14" rx="3"/><path d="m10 9 5 3-5 3z"/>',