Add PostgreSQL support with SQLite/Postgres database compatibility layer

- Add dbGet/dbAll helper functions for database-agnostic queries
- Add toDbBool/convertBooleansForDb for boolean type conversion
- Add toDbDate/getNow for timestamp type handling
- Add generateId that returns UUID for Postgres, nanoid for SQLite
- Update all routes to use compatibility helpers
- Add normalizeEvent to return clean number types from Postgres decimal
- Add formatPrice utility for consistent price display
- Add legal pages admin interface with RichTextEditor
- Update carousel images
- Add drizzle migration files for PostgreSQL

backend/src/routes/media.ts

@@ -1,5 +1,5 @@
 import { Hono } from 'hono';
-import { db, media } from '../db/index.js';
+import { db, dbGet, dbAll, media } from '../db/index.js';
 import { eq } from 'drizzle-orm';
 import { requireAuth } from '../lib/auth.js';
 import { generateId, getNow } from '../lib/utils.js';
@@ -85,11 +85,9 @@ mediaRouter.post('/upload', requireAuth(['admin', 'organizer']), async (c) => {
 mediaRouter.get('/:id', async (c) => {
   const id = c.req.param('id');
   
-  const mediaRecord = await (db as any)
-    .select()
-    .from(media)
-    .where(eq((media as any).id, id))
-    .get();
+  const mediaRecord = await dbGet<any>(
+    (db as any).select().from(media).where(eq((media as any).id, id))
+  );
   
   if (!mediaRecord) {
     return c.json({ error: 'Media not found' }, 404);
@@ -102,11 +100,9 @@ mediaRouter.get('/:id', async (c) => {
 mediaRouter.delete('/:id', requireAuth(['admin', 'organizer']), async (c) => {
   const id = c.req.param('id');
   
-  const mediaRecord = await (db as any)
-    .select()
-    .from(media)
-    .where(eq((media as any).id, id))
-    .get();
+  const mediaRecord = await dbGet<any>(
+    (db as any).select().from(media).where(eq((media as any).id, id))
+  );
   
   if (!mediaRecord) {
     return c.json({ error: 'Media not found' }, 404);
@@ -142,7 +138,7 @@ mediaRouter.get('/', requireAuth(['admin', 'organizer']), async (c) => {
     query = query.where(eq((media as any).relatedId, relatedId));
   }
   
-  const result = await query.all();
+  const result = await dbAll(query);
   
   return c.json({ media: result });
 });