fix: Backup and restore fixes

backend/src/features/backup/data/backup.repository.ts

@@ -287,6 +287,8 @@ export class BackupRepository {
       databaseTablesCount: number;
       documentsCount: number;
       metadata: BackupMetadata;
+      filename?: string;
+      filePath?: string;
     }
   ): Promise<BackupHistory | null> {
     const result = await this.pool.query(
@@ -296,10 +298,20 @@ export class BackupRepository {
        database_tables_count = $2,
        documents_count = $3,
        metadata = $4,
+       filename = COALESCE($5, filename),
+       file_path = COALESCE($6, file_path),
        completed_at = NOW()
-       WHERE id = $5
+       WHERE id = $7
        RETURNING *`,
-      [data.fileSizeBytes, data.databaseTablesCount, data.documentsCount, JSON.stringify(data.metadata), id]
+      [
+        data.fileSizeBytes,
+        data.databaseTablesCount,
+        data.documentsCount,
+        JSON.stringify(data.metadata),
+        data.filename || null,
+        data.filePath || null,
+        id,
+      ]
     );
     return result.rows.length > 0 ? this.mapHistoryRow(result.rows[0]) : null;
   }

backend/src/features/backup/domain/backup-archive.service.ts

@@ -145,8 +145,10 @@ export class BackupArchiveService {
       const postgresqlVersion = versionOutput.trim().split(' ')[1] || 'unknown';
 
       // Export database using pg_dump
+      // --clean: Output DROP statements before CREATE (required for restore to work on existing DB)
+      // --if-exists: Add IF EXISTS to DROP statements (prevents errors on fresh installs)
       await execAsync(
-        `pg_dump -h ${dbHost} -p ${dbPort} -U ${dbUser} -d ${dbName} --format=plain -f "${sqlPath}"`,
+        `pg_dump -h ${dbHost} -p ${dbPort} -U ${dbUser} -d ${dbName} --format=plain --clean --if-exists -f "${sqlPath}"`,
         { env: pgEnv }
       );
 

backend/src/features/backup/domain/backup.service.ts

@@ -82,6 +82,8 @@ export class BackupService {
         fileSizeBytes: result.sizeBytes,
         databaseTablesCount: result.manifest.contents.database.tablesCount,
         documentsCount: result.manifest.contents.documents.totalFiles,
+        filename,
+        filePath: result.archivePath,
         metadata: {
           ...result.manifest.metadata,
           filename,