feat: add AUR repository support for Arch Linux packages

- Extended database schema and models to include 'aur' as a valid repository type alongside 'official' and 'third-party'
- Added repository filter UI in package browser for Arch platform to distinguish between official and AUR packages
- Enhanced init-db script with migration system to track and apply schema changes automatically

scripts/init-db.js

@@ -36,7 +36,7 @@ async function main() {
     await admin.end().catch(() => {})
   }
 
-  // Connect to the target DB and apply schema
+  // Connect to the target DB and apply schema, then run migrations
   const db = new Pool({
     host: DB_HOST,
     port: DB_PORT,
@@ -59,10 +59,82 @@ async function main() {
     } else {
       console.error('❌ Schema apply error:', err)
       process.exitCode = 1
+      // continue to attempt migrations anyway
     }
-  } finally {
-    await db.end().catch(() => {})
+  } 
+
+  // Ensure schema_migrations table exists
+  try {
+    await db.query(`
+      CREATE TABLE IF NOT EXISTS schema_migrations (
+        id SERIAL PRIMARY KEY,
+        filename TEXT UNIQUE NOT NULL,
+        applied_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+      );
+    `)
+  } catch (err) {
+    console.error('❌ Failed to ensure schema_migrations table:', err)
+    process.exitCode = 1
   }
+
+  // Discover migration files
+  try {
+    const migrationsDir = path.join(__dirname, 'migrations')
+    const migrationFiles = []
+
+    if (fs.existsSync(migrationsDir)) {
+      for (const f of fs.readdirSync(migrationsDir)) {
+        if (f.endsWith('.sql')) {
+          migrationFiles.push({ filename: f, fullpath: path.join(migrationsDir, f) })
+        }
+      }
+    }
+
+    // Back-compat: also pick up legacy root-level migrations named migrate-*.sql
+    for (const f of fs.readdirSync(__dirname)) {
+      if (f.startsWith('migrate-') && f.endsWith('.sql')) {
+        migrationFiles.push({ filename: f, fullpath: path.join(__dirname, f) })
+      }
+    }
+
+    // Sort by filename for deterministic order (e.g., 001_*, 002_* ...)
+    migrationFiles.sort((a, b) => a.filename.localeCompare(b.filename))
+
+    if (migrationFiles.length) {
+      console.log(`🚀 Running migrations (${migrationFiles.length} found)...`)
+    } else {
+      console.log('ℹ️ No migrations found')
+    }
+
+    for (const m of migrationFiles) {
+      try {
+        const { rows } = await db.query('SELECT 1 FROM schema_migrations WHERE filename = $1', [m.filename])
+        if (rows.length) {
+          console.log(`↪️  Skipping already applied migration: ${m.filename}`)
+          continue
+        }
+
+        const sql = fs.readFileSync(m.fullpath, 'utf8')
+        console.log(`➡️  Applying migration: ${m.filename}`)
+        await db.query('BEGIN')
+        await db.query(sql)
+        await db.query('INSERT INTO schema_migrations (filename) VALUES ($1)', [m.filename])
+        await db.query('COMMIT')
+        console.log(`✅ Migration applied: ${m.filename}`)
+      } catch (err) {
+        console.error(`❌ Migration failed: ${m.filename}`, err)
+        try { await db.query('ROLLBACK') } catch {}
+        process.exitCode = 1
+        break
+      }
+    }
+  } catch (err) {
+    console.error('❌ Failed during migration discovery/execution:', err)
+    process.exitCode = 1
+  }
+
+  // Done
+  await db.end().catch(() => {})
 }
 
 main().catch((e) => {

scripts/migrate-add-aur-to-repository.sql

@@ -0,0 +1,5 @@
+-- Add 'aur' to repository check constraint
+ALTER TABLE packages DROP CONSTRAINT IF EXISTS packages_repository_check;
+ALTER TABLE packages
+  ADD CONSTRAINT packages_repository_check
+  CHECK (repository IN ('official','third-party','aur'));