feat: add coloured calendar system indicators

Add a selectable single-dot or per-system indicator mode. Date systems now carry configurable colours; results are cached per displayed month and invalidated when paths/settings change. Refine calendar hierarchy, spacing, hover, and today states.

src/views/waypoint-view.ts

@@ -181,6 +181,14 @@ export class WaypointView extends ItemView {
 			this.plugin.settings.calendar.firstDayOfWeek,
 		);
 
+		const systemIndicators = this.plugin.settings.calendar.showNoteIndicators
+			&& this.plugin.settings.calendar.indicatorMode === 'systems'
+			? this.plugin.getDateSystemIndicators(weeks.reduce<moment.Moment[]>(
+				(dates, week) => dates.concat(week.days.map(day => day.date)),
+				[],
+			))
+			: null;
+
 		for (const week of weeks) {
 			const row = tbody.createEl('tr');
 
@@ -211,8 +219,20 @@ export class WaypointView extends ItemView {
 
 				if (this.plugin.settings.calendar.showNoteIndicators) {
 					const dateStr = day.date.format('YYYY-MM-DD');
-					if (this.plugin.hasNoteForDate(dateStr)) {
-						cell.addClass('has-note');
+					if (this.plugin.settings.calendar.indicatorMode === 'any') {
+						if (this.plugin.hasNoteForDate(dateStr)) {
+							cell.addClass('has-note');
+						}
+					} else {
+						const indicators = systemIndicators?.get(dateStr) || [];
+						if (indicators.length > 0) {
+							const dots = cell.createDiv({ cls: 'waypoint-day-indicators' });
+							for (const indicator of indicators) {
+								const dot = dots.createSpan({ cls: 'waypoint-day-indicator' });
+								dot.style.setProperty('--waypoint-indicator-color', indicator.color);
+								setTooltip(dot, indicator.name);
+							}
+						}
 					}
 				}