style(13-03): apply Prettier formatting across repo

Mechanical reformat — no logic changes. 398 files changed, 19125
insertions(+), 16457 deletions(-). Prettier 3.8.4 with .prettierrc
(singleQuote:true, semi:true, tabWidth:2, trailingComma:all,
printWidth:100). Isolated per D-13-08 for reviewability.

apps/pwa/src/components/EmptyState.tsx

@@ -10,7 +10,7 @@
  * Only rendered when fetch succeeded AND zero events in the visible window.
  */
 
-import { CalendarDays } from 'lucide-react'
+import { CalendarDays } from 'lucide-react';
 
 export function EmptyState() {
   return (
@@ -27,11 +27,7 @@ export function EmptyState() {
         flex: 1,
       }}
     >
-      <CalendarDays
-        size={32}
-        style={{ color: 'var(--color-text-muted)' }}
-        aria-hidden="true"
-      />
+      <CalendarDays size={32} style={{ color: 'var(--color-text-muted)' }} aria-hidden="true" />
       <div>
         <h2
           style={{
@@ -58,5 +54,5 @@ export function EmptyState() {
         </p>
       </div>
     </div>
-  )
+  );
 }