feat(manadeck): migrate backend from Supabase to PostgreSQL with Drizzle ORM

Phase 3 of ManaDeck database migration:

Database Package (@manacore/manadeck-database):
- Configure package for NodeNext module resolution with .js extensions
- Add build script and proper exports for ESM/CJS compatibility
- Export schema types and Drizzle utilities

Backend Migration:
- Add DatabaseModule with singleton database provider
- Create repository layer with Drizzle ORM:
  - DeckRepository: CRUD operations for decks
  - CardRepository: CRUD operations for cards
  - UserStatsRepository: Stats and leaderboard queries
  - DeckTemplateRepository: Template management
- Update ApiController to use repositories for all database operations
- Update PublicController to use repositories for featured decks, leaderboard, templates
- Add DATABASE_URL environment variable support

The backend now uses PostgreSQL via Drizzle ORM instead of Supabase SDK
for database operations. Supabase is still used for auth (via Mana Core)
and edge functions.

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

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

packages/manadeck-database/src/client.ts

@@ -1,6 +1,6 @@
 import { drizzle } from 'drizzle-orm/postgres-js';
 import postgres from 'postgres';
-import * as schema from './schema';
+import * as schema from './schema/index.js';
 
 // Singleton instance for the database client
 let dbInstance: ReturnType<typeof drizzle<typeof schema>> | null = null;

packages/manadeck-database/src/index.ts

@@ -1,7 +1,7 @@
 // Main entry point for @manacore/manadeck-database
 
 // Export database client utilities
-export { createClient, getDb, closeDb, type Database } from './client';
+export { createClient, getDb, closeDb, type Database } from './client.js';
 
 // Export Drizzle utilities
 export {
@@ -28,7 +28,7 @@ export {
   avg,
   min,
   max,
-} from './client';
+} from './client.js';
 
 // Export all schemas and types
-export * from './schema';
+export * from './schema/index.js';

packages/manadeck-database/src/migrate-from-supabase.ts

@@ -11,7 +11,7 @@
  */
 
 import { createClient as createSupabaseClient } from '@supabase/supabase-js';
-import { getDb, closeDb } from './client';
+import { getDb, closeDb } from './client.js';
 import {
   decks,
   cards,
@@ -21,7 +21,7 @@ import {
   aiGenerations,
   userStats,
   dailyProgress,
-} from './schema';
+} from './schema/index.js';
 
 // Initialize Supabase client
 const supabaseUrl = process.env.SUPABASE_URL;

packages/manadeck-database/src/migrate.ts

@@ -1,5 +1,5 @@
 import { migrate } from 'drizzle-orm/postgres-js/migrator';
-import { createClient } from './client';
+import { createClient } from './client.js';
 import path from 'path';
 
 async function runMigrations() {

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

@@ -9,7 +9,7 @@ import {
   pgEnum,
 } from 'drizzle-orm/pg-core';
 import { relations } from 'drizzle-orm';
-import { decks } from './decks';
+import { decks } from './decks.js';
 
 // AI generation status enum
 export const aiGenerationStatusEnum = pgEnum('ai_generation_status', [

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

@@ -9,7 +9,7 @@ import {
   unique,
 } from 'drizzle-orm/pg-core';
 import { relations } from 'drizzle-orm';
-import { cards } from './cards';
+import { cards } from './cards.js';
 
 // Progress status enum (SM-2 algorithm states)
 export const progressStatusEnum = pgEnum('progress_status', [

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

@@ -11,8 +11,8 @@ import {
   pgEnum,
 } from 'drizzle-orm/pg-core';
 import { relations } from 'drizzle-orm';
-import { decks } from './decks';
-import { cardProgress } from './cardProgress';
+import { decks } from './decks.js';
+import { cardProgress } from './cardProgress.js';
 
 // Card type enum
 export const cardTypeEnum = pgEnum('card_type', ['text', 'flashcard', 'quiz', 'mixed']);

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

@@ -9,9 +9,9 @@ import {
   index,
 } from 'drizzle-orm/pg-core';
 import { relations } from 'drizzle-orm';
-import { cards } from './cards';
-import { studySessions } from './studySessions';
-import { aiGenerations } from './aiGenerations';
+import { cards } from './cards.js';
+import { studySessions } from './studySessions.js';
+import { aiGenerations } from './aiGenerations.js';
 
 export const decks = pgTable(
   'decks',

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

@@ -1,16 +1,16 @@
 // Export all schemas
-export * from './decks';
-export * from './cards';
-export * from './studySessions';
-export * from './cardProgress';
-export * from './deckTemplates';
-export * from './aiGenerations';
-export * from './userStats';
-export * from './dailyProgress';
+export * from './decks.js';
+export * from './cards.js';
+export * from './studySessions.js';
+export * from './cardProgress.js';
+export * from './deckTemplates.js';
+export * from './aiGenerations.js';
+export * from './userStats.js';
+export * from './dailyProgress.js';
 
 // Re-export relations for use with Drizzle query builder
-export { decksRelations } from './decks';
-export { cardsRelations } from './cards';
-export { studySessionsRelations } from './studySessions';
-export { cardProgressRelations } from './cardProgress';
-export { aiGenerationsRelations } from './aiGenerations';
+export { decksRelations } from './decks.js';
+export { cardsRelations } from './cards.js';
+export { studySessionsRelations } from './studySessions.js';
+export { cardProgressRelations } from './cardProgress.js';
+export { aiGenerationsRelations } from './aiGenerations.js';

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

@@ -8,7 +8,7 @@ import {
   pgEnum,
 } from 'drizzle-orm/pg-core';
 import { relations } from 'drizzle-orm';
-import { decks } from './decks';
+import { decks } from './decks.js';
 
 // Study mode enum
 export const studyModeEnum = pgEnum('study_mode', ['all', 'new', 'review', 'favorites', 'random']);

packages/manadeck-database/src/seed.ts

@@ -1,5 +1,5 @@
-import { getDb, closeDb } from './client';
-import { deckTemplates } from './schema';
+import { getDb, closeDb } from './client.js';
+import { deckTemplates } from './schema/index.js';
 
 /**
  * Seed the database with initial data

packages/manadeck-database/src/test-connection.ts

@@ -3,7 +3,7 @@
  * Usage: pnpm db:test
  */
 
-import { getDb, closeDb, sql } from './client';
+import { getDb, closeDb, sql } from './client.js';
 
 async function testConnection() {
   console.log('Testing database connection...\n');