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/api/tests/helpers/db.ts

@@ -7,7 +7,7 @@
  */
 
 // Re-export vi for convenience in test files
-export { vi } from 'vitest'
+export { vi } from 'vitest';
 
 /**
  * Creates a minimal mock for the Drizzle `db` singleton.
@@ -27,7 +27,7 @@ export function createMockDb() {
     onDuplicateKeyUpdate: vi.fn().mockResolvedValue([{ id: 1 }]),
     $returningId: vi.fn().mockResolvedValue([{ id: 1 }]),
     execute: vi.fn().mockResolvedValue([]),
-  }
+  };
 }
 
 /**
@@ -42,7 +42,7 @@ DTSTART:20260615T100000Z
 DTEND:20260615T110000Z
 SUMMARY:Test Timed Event
 END:VEVENT
-END:VCALENDAR`
+END:VCALENDAR`;
 
 /**
  * Sample VEVENT string for broker tests — an all-day event (Plan 03).
@@ -56,7 +56,7 @@ DTSTART;VALUE=DATE:20260615
 DTEND;VALUE=DATE:20260616
 SUMMARY:Test All-Day Event
 END:VEVENT
-END:VCALENDAR`
+END:VCALENDAR`;
 
 /**
  * Sample VEVENT string — a timed recurring event (RRULE:FREQ=WEEKLY).
@@ -71,7 +71,7 @@ DTSTART:20240101T100000Z
 RRULE:FREQ=WEEKLY;BYDAY=MO
 SUMMARY:Weekly Monday Meeting
 END:VEVENT
-END:VCALENDAR`
+END:VCALENDAR`;
 
 /**
  * Sample VEVENT string — an all-day recurring event (RRULE:FREQ=YEARLY).
@@ -87,4 +87,4 @@ DTSTART;VALUE=DATE:20240615
 RRULE:FREQ=YEARLY
 SUMMARY:Annual Birthday
 END:VEVENT
-END:VCALENDAR`
+END:VCALENDAR`;