Fix scan output file paths and improve notification system

- Save JSON/HTML/ZIP paths to database when scans complete
- Remove orphaned scan-config-id reference causing JS errors
- Add showAlert function to scan_detail.html and scans.html
- Increase notification z-index to 9999 for modal visibility
- Replace inline alert creation with consistent toast notifications

app/web/jobs/scan_job.py

@@ -77,12 +77,12 @@ def execute_scan(scan_id: int, config_id: int, db_url: str = None):
 
         # Generate output files (JSON, HTML, ZIP)
         logger.info(f"Scan {scan_id}: Generating output files...")
-        scanner.generate_outputs(report, timestamp)
+        output_paths = scanner.generate_outputs(report, timestamp)
 
         # Save results to database
         logger.info(f"Scan {scan_id}: Saving results to database...")
         scan_service = ScanService(session)
-        scan_service._save_scan_to_db(report, scan_id, status='completed')
+        scan_service._save_scan_to_db(report, scan_id, status='completed', output_paths=output_paths)
 
         # Evaluate alert rules
         logger.info(f"Scan {scan_id}: Evaluating alert rules...")