feat: UI overhaul - component library + route layouts with instant headers

- Created 11 reusable UI components: PageHeader, SectionCard, StatCard, StatusBadge, TabBar, MemberList, ActivityFeed, EventCard, ContentSkeleton, QuickLinkGrid, ModuleCard
- Created route-specific +layout.svelte for documents, calendar, kanban, events, settings, account
- Each layout renders PageHeader instantly from parent data, shows ContentSkeleton during navigation
- Removed full-page PageSkeleton from parent layout
- Refactored all pages to use new components instead of inline markup
- Overview page: uses StatCard, SectionCard, EventCard, ActivityFeed, MemberList, QuickLinkGrid
- Events list: uses EventCard, Button components
- Event detail: uses ModuleCard, SectionCard
- Settings/Account/Calendar/Kanban: headers in layouts, toolbars in pages
- Added i18n keys for overview page (EN + ET)
- 0 errors, 112 tests pass

src/routes/[orgSlug]/+layout.server.ts

@@ -20,7 +20,7 @@ export const load: LayoutServerLoad = async ({ params, locals }) => {
 	}
 
 	// Now fetch membership, members, activity, and user profile in parallel (all depend on org.id)
-	const [membershipResult, membersResult, activityResult, profileResult, docCountResult, folderCountResult, kanbanCountResult] = await Promise.all([
+	const [membershipResult, membersResult, activityResult, profileResult, docCountResult, folderCountResult, kanbanCountResult, eventCountResult] = await Promise.all([
 		locals.supabase
 			.from('org_members')
 			.select('role, role_id')
@@ -68,7 +68,11 @@ export const load: LayoutServerLoad = async ({ params, locals }) => {
 			.from('documents')
 			.select('id', { count: 'exact', head: true })
 			.eq('org_id', org.id)
-			.eq('type', 'kanban')
+			.eq('type', 'kanban'),
+		locals.supabase
+			.from('events')
+			.select('id', { count: 'exact', head: true })
+			.eq('org_id', org.id)
 	]);
 
 	const { data: membership } = membershipResult;
@@ -81,6 +85,7 @@ export const load: LayoutServerLoad = async ({ params, locals }) => {
 		documentCount: docCountResult.count ?? 0,
 		folderCount: folderCountResult.count ?? 0,
 		kanbanCount: kanbanCountResult.count ?? 0,
+		eventCount: eventCountResult.count ?? 0,
 	};
 
 	if (!membership) {
@@ -121,6 +126,15 @@ export const load: LayoutServerLoad = async ({ params, locals }) => {
 		profiles: (m.user_id ? memberProfilesMap[m.user_id] : null) ?? null
 	}));
 
+	// Fetch upcoming events for the overview
+	const { data: upcomingEvents } = await locals.supabase
+		.from('events')
+		.select('id, name, slug, status, start_date, end_date, color, venue_name')
+		.eq('org_id', org.id)
+		.in('status', ['planning', 'active'])
+		.order('start_date', { ascending: true, nullsFirst: false })
+		.limit(5);
+
 	return {
 		org,
 		userRole: membership.role,
@@ -128,6 +142,7 @@ export const load: LayoutServerLoad = async ({ params, locals }) => {
 		members,
 		recentActivity: recentActivity ?? [],
 		stats,
+		upcomingEvents: upcomingEvents ?? [],
 		user,
 		profile: profile ?? { id: user.id, email: user.email ?? '', full_name: null, avatar_url: null }
 	};