feat: initialize Discord clone application with core backend services and Electron frontend.

Backend/scripts/migrate_dms.js

@@ -0,0 +1,32 @@
+const path = require('path');
+require('dotenv').config({ path: path.join(__dirname, '../.env') });
+const db = require('../db');
+
+async function migrate() {
+    try {
+        console.log('Running DM migration...');
+
+        // 1. Update the check constraint to allow 'dm' type
+        await db.query("ALTER TABLE channels DROP CONSTRAINT IF EXISTS channels_type_check");
+        await db.query("ALTER TABLE channels ADD CONSTRAINT channels_type_check CHECK (type IN ('text', 'voice', 'dm'))");
+        console.log('  Updated channels type constraint to allow dm.');
+
+        // 2. Create dm_participants table
+        await db.query(`
+            CREATE TABLE IF NOT EXISTS dm_participants (
+                channel_id UUID REFERENCES channels(id) ON DELETE CASCADE,
+                user_id UUID REFERENCES users(id) ON DELETE CASCADE,
+                PRIMARY KEY (channel_id, user_id)
+            )
+        `);
+        console.log('  Created dm_participants table.');
+
+        console.log('DM migration complete.');
+        process.exit(0);
+    } catch (err) {
+        console.error('DM migration failed:', err);
+        process.exit(1);
+    }
+}
+
+migrate();