feat: P2.2 Create Appointment from Email + P2.4 Calendar Dashlet + P2.12 Action Wheel + P2.14 Share Files

- P2.2: 'Create Appointment' button in email viewer → pre-fills event modal
  with subject, body, participants, date. calendar-store newEventPrefill state.
- P2.4: MiniCalendarDashlet in sidebar bottom — month grid with event dots,
  day click navigates to calendar. Collapsible, respect firstDayOfWeek.
- P2.12: Custom radial menu (components/ui/radial-menu.tsx) — circular SVG
  menu with keyboard nav, animations. Wired into email-list, contact-list,
  file-browser, calendar-month-view right-click handlers.
- P2.14: 'Send as Attachment' button in file browser — opens compose tab
  with selected files pre-attached via Pro tab store.

app/(main)/[locale]/calendar/page.tsx

@@ -97,6 +97,7 @@ export default function CalendarPage() {
     setSelectedDate, setViewMode, toggleCalendarVisibility, updateCalendar, shareCalendar,
     removeCalendar, clearCalendarEvents,
     refreshAllSubscriptions, icalSubscriptions,
+    newEventPrefill, setNewEventPrefill,
   } = useCalendarStore();
   const calendarEnabled = usePolicyStore((s) => s.isFeatureEnabled('calendarEnabled'));
   const calendarTasksEnabled = usePolicyStore((s) => s.isFeatureEnabled('calendarTasksEnabled'));
@@ -464,6 +465,19 @@ export default function CalendarPage() {
     setShowEventModal(true);
   }, [selectedDate, setSelectedDate]);
 
+  useEffect(() => {
+    if (!newEventPrefill) return;
+    setEditEvent(null);
+    if (newEventPrefill.date) {
+      const d = new Date(newEventPrefill.date);
+      if (!isNaN(d.getTime())) {
+        setDefaultModalDate(d);
+        setSelectedDate(d);
+      }
+    }
+    setShowEventModal(true);
+  }, [newEventPrefill, setSelectedDate]);
+
   const openEditModal = useCallback((event: CalendarEvent) => {
     setEditEvent(event);
     setDefaultModalDate(undefined);
@@ -1198,6 +1212,9 @@ export default function CalendarPage() {
               onContextMenuEvent={handleContextMenuEvent}
               onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
+              onEditEvent={openEditModal}
+              onDeleteEvent={handleDeleteContextMenu}
+              onDuplicateEvent={handleDuplicateContextMenu}
               firstDayOfWeek={firstDayOfWeek}
               isMobile={isMobile}
               pendingPreview={pendingPreview}
@@ -1490,10 +1507,14 @@ export default function CalendarPage() {
                 onDelete={handleDeleteEvent}
                 onDuplicate={handleDuplicateEvent}
                 onRsvp={handleRsvp}
-                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
+                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); setNewEventPrefill(null); }}
                 onPreviewChange={setPendingPreview}
                 currentUserEmails={currentUserEmails}
                 isMobile={false}
+                prefillTitle={editEvent ? undefined : newEventPrefill?.title}
+                prefillDescription={editEvent ? undefined : newEventPrefill?.description}
+                prefillParticipants={editEvent ? undefined : newEventPrefill?.participants}
+                prefillDate={editEvent ? undefined : newEventPrefill?.date}
               />
             </div>
           )}
@@ -1620,9 +1641,13 @@ export default function CalendarPage() {
           onDelete={handleDeleteEvent}
           onDuplicate={handleDuplicateEvent}
           onRsvp={handleRsvp}
-          onClose={() => { setShowEventModal(false); setEditEvent(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
+          onClose={() => { setShowEventModal(false); setEditEvent(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); setNewEventPrefill(null); }}
           currentUserEmails={currentUserEmails}
           isMobile={true}
+          prefillTitle={editEvent ? undefined : newEventPrefill?.title}
+          prefillDescription={editEvent ? undefined : newEventPrefill?.description}
+          prefillParticipants={editEvent ? undefined : newEventPrefill?.participants}
+          prefillDate={editEvent ? undefined : newEventPrefill?.date}
         />
       )}