fix(db): use TEXT for user_id columns across entire codebase

Better Auth generates non-UUID user IDs (32-char base62 format like
'otUe1YrfENPdHnrF3g1vSBfpkQfambCZ'). Changed all `uuid('user_id')` to
`text('user_id')` in Drizzle schemas for consistency with auth system.

Affected packages/apps:
- apps/calendar, clock, picture, zitare
- games/figgos, voxelava
- packages/manadeck-database, news-database, uload-database
- services/mana-core-auth (feedback schema)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/manadeck-database/src/schema/decks.ts

@@ -1,8 +1,8 @@
 import {
 	pgTable,
 	uuid,
-	varchar,
 	text,
+	varchar,
 	boolean,
 	timestamp,
 	jsonb,
@@ -17,7 +17,7 @@ export const decks = pgTable(
 	'decks',
 	{
 		id: uuid('id').primaryKey().defaultRandom(),
-		userId: uuid('user_id').notNull(),
+		userId: text('user_id').notNull(),
 		title: varchar('title', { length: 255 }).notNull(),
 		description: text('description'),
 		coverImageUrl: text('cover_image_url'),