Fix to_dict error and finding sort order

- Add to_dict() method to dynamic Vulnerability objects in ModalScanResult
so report generation (JSON/Markdown export) works correctly
- Sort findings by severity (descending) then line number (ascending)

gradio_app.py

@@ -55,8 +55,10 @@ class ModalScanResult:
             self.vulnerabilities = []
             for v in vuln_data:
                 # Create a simple object with attributes matching Vulnerability
+                raw = dict(v)  # preserve original dict for to_dict()
                 vuln_obj = type('Vulnerability', (), v)()
                 vuln_obj.risk_level = type('RiskLevel', (), {'value': v.get('risk_level', 'INFO'), 'name': v.get('risk_level', 'INFO')})()
+                vuln_obj.to_dict = lambda _raw=raw: _raw
                 self.vulnerabilities.append(vuln_obj)
         else:
             self.vulnerabilities = []
@@ -1193,7 +1195,7 @@ class ModernSecurityAuditorApp:
                         }
                         sorted_vulns = sorted(
                             unique_vulns,
-                            key=lambda v: severity_order.get(v.risk_level, 5)
+                            key=lambda v: (severity_order.get(v.risk_level, 5), getattr(v, 'line_number', 0))
                         )
 
                         for vuln in sorted_vulns: