feat: slide panels, task calendar, team management, project editing, collapsible sections

- Add SlidePanel, TaskDetailPanel, PostDetailPanel, TeamPanel, TeamMemberPanel
- Add ProjectEditPanel, CollapsibleSection, DatePresetPicker, TaskCalendarView
- Update App, AuthContext, i18n (ar/en), PostProduction, ProjectDetail, Projects
- Update Settings, Tasks, Team pages
- Update InteractiveTimeline, MemberCard, ProjectCard, TaskCard components
- Update server API utilities
- Remove tracked server/node_modules (now properly gitignored)

client/src/components/MemberCard.jsx

@@ -59,6 +59,17 @@ export default function MemberCard({ member, onClick }) {
           ))}
         </div>
       )}
+
+      {/* Teams */}
+      {member.teams && member.teams.length > 0 && (
+        <div className="flex flex-wrap gap-1 justify-center mt-2">
+          {member.teams.map((team) => (
+            <span key={team.id} className="text-[10px] px-2 py-0.5 rounded-full bg-blue-50 text-blue-600 font-medium">
+              {team.name}
+            </span>
+          ))}
+        </div>
+      )}
     </div>
   )
 }