Calendar visual overhaul: translucent events, AU locale, typography hierarchy

- Import en-AU locale (object, not string) for proper date format (day/month)
- Add 12-hour time format (9:00 AM), side-by-side overlap columns
- Replace flat opaque event rectangles with translucent color-mix fills (12% opacity)
- Add 2px left accent border per calendar color via CSS custom property
- Implement eventContent render hook with typography hierarchy (time secondary, title primary)
- Add recurring event indicator (Repeat icon) next to recurring event titles
- Add now-indicator 6px pulse dot with prefers-reduced-motion respect
- Add subtle weekend column tint (hsl 0 0% 6%)
- Mobile: hide time spans in month view custom eventContent
- Update +more popover to inherit translucent event styling
- Document calendar event patterns in stylesheet.md

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

frontend/src/components/calendar/CalendarPage.tsx

@@ -8,8 +8,9 @@ import FullCalendar from '@fullcalendar/react';
 import dayGridPlugin from '@fullcalendar/daygrid';
 import timeGridPlugin from '@fullcalendar/timegrid';
 import interactionPlugin from '@fullcalendar/interaction';
-import type { EventClickArg, DateSelectArg, EventDropArg, DatesSetArg } from '@fullcalendar/core';
+import enAuLocale from '@fullcalendar/core/locales/en-au';
-import { ChevronLeft, ChevronRight, PanelLeft, Plus, Search } from 'lucide-react';
+import type { EventClickArg, DateSelectArg, EventDropArg, DatesSetArg, EventContentArg } from '@fullcalendar/core';
+import { ChevronLeft, ChevronRight, PanelLeft, Plus, Search, Repeat } from 'lucide-react';
 import api, { getErrorMessage } from '@/lib/api';
 import axios from 'axios';
 import type { CalendarEvent, EventTemplate, Location as LocationType, CalendarPermission } from '@/types';
@@ -500,6 +501,56 @@ export default function CalendarPage() {
   const navigateToday = () => calendarRef.current?.getApi().today();
   const changeView = (view: CalendarView) => calendarRef.current?.getApi().changeView(view);
 
+  // Set --event-color CSS var via eventDidMount (write-only, no reads)
+  const handleEventDidMount = useCallback((info: { el: HTMLElement; event: { extendedProps: Record<string, unknown> } }) => {
+    const color = info.event.extendedProps.calendarColor as string;
+    if (color) {
+      info.el.style.setProperty('--event-color', color);
+    }
+    info.el.classList.add('umbra-event');
+  }, []);
+
+  const renderEventContent = useCallback((arg: EventContentArg) => {
+    const isMonth = arg.view.type === 'dayGridMonth';
+    const isAllDay = arg.event.allDay;
+    const isRecurring = arg.event.extendedProps.is_recurring || arg.event.extendedProps.parent_event_id;
+
+    const repeatIcon = isRecurring ? (
+      <Repeat className="h-2.5 w-2.5 shrink-0 opacity-50" />
+    ) : null;
+
+    if (isAllDay) {
+      return (
+        <div className="flex items-center gap-1 truncate">
+          <span className="text-[11px] font-medium truncate">{arg.event.title}</span>
+          {repeatIcon}
+        </div>
+      );
+    }
+
+    if (isMonth) {
+      return (
+        <div className="flex items-center gap-1 truncate">
+          <span className="umbra-event-time text-[11px] opacity-60 shrink-0">{arg.timeText}</span>
+          <span className="text-[11px] font-medium truncate">{arg.event.title}</span>
+          {repeatIcon}
+        </div>
+      );
+    }
+
+    // Week/day view
+    return (
+      <div className="flex flex-col overflow-hidden h-full">
+        <span className="text-[10px] opacity-60 leading-tight">{arg.timeText}</span>
+        <div className="flex items-center gap-1">
+          <span className="text-[12px] font-medium truncate">{arg.event.title}</span>
+          {repeatIcon}
+        </div>
+      </div>
+    );
+  }, []);
+
+
   return (
     <div className="flex h-full overflow-hidden animate-fade-in">
       <div className="hidden lg:flex lg:flex-row shrink-0">
@@ -644,6 +695,13 @@ export default function CalendarPage() {
                 select={handleDateSelect}
                 datesSet={handleDatesSet}
                 height="100%"
+                locale={enAuLocale}
+                eventTimeFormat={{ hour: 'numeric', minute: '2-digit', meridiem: 'short' }}
+                slotLabelFormat={{ hour: 'numeric', minute: '2-digit', meridiem: 'short' }}
+                dayHeaderFormat={{ weekday: 'short', day: 'numeric', month: 'numeric' }}
+                slotEventOverlap={false}
+                eventDidMount={handleEventDidMount}
+                eventContent={renderEventContent}
               />
             </div>
           </div>

frontend/src/index.css

@@ -91,9 +91,9 @@
   --fc-button-hover-border-color: hsl(0 0% 20%);
   --fc-button-active-bg-color: hsl(var(--accent-color));
   --fc-button-active-border-color: hsl(var(--accent-color));
-  --fc-event-bg-color: hsl(var(--accent-color));
+  --fc-event-bg-color: transparent;
-  --fc-event-border-color: hsl(var(--accent-color));
+  --fc-event-border-color: transparent;
-  --fc-event-text-color: hsl(0 0% 98%);
+  --fc-event-text-color: inherit;
   --fc-page-bg-color: transparent;
   --fc-neutral-bg-color: hsl(0 0% 8% / 0.65);
   --fc-neutral-text-color: hsl(0 0% 98%);
@@ -144,6 +144,32 @@
   border-bottom-color: hsl(var(--accent-color));
 }
 
+/* Now indicator pulse dot */
+.fc .fc-timegrid-now-indicator-line::before {
+  content: '';
+  position: absolute;
+  left: -3px;
+  top: -3px;
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: hsl(var(--accent-color));
+  animation: pulse-dot 2s ease-in-out infinite;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .fc .fc-timegrid-now-indicator-line::before {
+    animation: none;
+    opacity: 1;
+  }
+}
+
+/* Weekend column tint */
+.fc .fc-day-sat,
+.fc .fc-day-sun {
+  background-color: hsl(0 0% 6%);
+}
+
 .fc .fc-col-header-cell {
   background-color: hsl(0 0% 8% / 0.65);
   border-color: var(--fc-border-color);
@@ -171,21 +197,41 @@
   color: hsl(0 0% 63.9%);
 }
 
-/* Event pills — compact rounded style */
+/* ── Translucent event styling ── */
-.fc .fc-daygrid-event {
+.fc .umbra-event {
-  border-radius: 4px;
+  background: color-mix(in srgb, var(--event-color) 12%, transparent) !important;
+  border: none !important;
+  border-left: 2px solid var(--event-color) !important;
+  border-radius: 5px;
+  cursor: pointer;
+  transition: background-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
+}
+
+.fc .umbra-event .fc-event-main {
+  color: var(--event-color) !important;
+}
+
+/* Hover state */
+.fc .umbra-event:hover {
+  background: color-mix(in srgb, var(--event-color) 22%, transparent) !important;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
+}
+
+/* Day grid (month view) */
+.fc .fc-daygrid-event.umbra-event {
   font-size: 0.75rem;
-  padding: 0px 4px;
+  padding: 1px 6px;
   line-height: 1.4;
 }
 
-.fc .fc-timegrid-event {
+/* Time grid (week/day view) */
-  border-radius: 4px;
+.fc .fc-timegrid-event.umbra-event {
-  font-size: 0.75rem;
+  border-radius: 6px;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
 }
 
-.fc .fc-timegrid-event .fc-event-main {
+.fc .fc-timegrid-event.umbra-event .fc-event-main {
-  padding: 2px 4px;
+  padding: 3px 6px;
 }
 
 /* Day number styling for today */
@@ -262,6 +308,10 @@
     padding: 2px 6px;
     margin-bottom: 2px;
   }
+  /* Ensure translucent events in popover inherit styling */
+  .fc .fc-more-popover .umbra-event {
+    margin-bottom: 2px;
+  }
 }
 
 /* ── Chromium native date picker icon fix (safety net) ── */
@@ -358,6 +408,11 @@ form[data-submitted] input:invalid + button {
     display: none;
   }
 
+  /* Hide time spans in custom eventContent on mobile month view */
+  .fc .fc-daygrid-event .umbra-event-time {
+    display: none;
+  }
+
   .fc .fc-timegrid-event {
     font-size: 0.6rem;
   }