Update notification service

AppImage/scripts/health_monitor.py

@@ -1817,7 +1817,8 @@ class HealthMonitor:
                 checks[vm_label] = {
                     'status': val.get('status', 'WARNING'),
                     'detail': val.get('reason', 'Error'),
-                    'dismissable': True
+                    'dismissable': True,
+                    'error_key': vm_label
                 }
             
             if not issues:
@@ -1878,16 +1879,20 @@ class HealthMonitor:
             # Build checks dict with status per service
             checks = {}
             for svc in services_to_check:
+                error_key = f'pve_service_{svc}'
                 if svc in failed_services:
                     state = service_details.get(svc, 'inactive')
                     checks[svc] = {
                         'status': 'CRITICAL',
                         'detail': f'Service is {state}',
+                        'error_key': error_key,
+                        'dismissable': True,
                     }
                 else:
                     checks[svc] = {
                         'status': 'OK',
                         'detail': 'Active',
+                        'error_key': error_key,
                     }
             
             if is_cluster:
@@ -2445,20 +2450,24 @@ class HealthMonitor:
                     'status': sec_status,
                     'detail': f'{len(security_updates_packages)} security update(s) pending' if security_updates_packages else 'No security updates pending',
                     'dismissable': True if security_updates_packages and not sec_dismissed else False,
-                    'dismissed': bool(sec_dismissed)
+                    'dismissed': bool(sec_dismissed),
+                    'error_key': 'security_updates'
                 },
                 'system_age': {
                     'status': update_age_status,
                     'detail': f'Last updated {last_update_days} day(s) ago' if last_update_days is not None else 'Unknown',
-                    'dismissable': False if update_age_status == 'CRITICAL' else True if update_age_status == 'WARNING' else False
+                    'dismissable': False if update_age_status == 'CRITICAL' else True if update_age_status == 'WARNING' else False,
+                    'error_key': 'system_age'
                 },
                 'pending_updates': {
                     'status': 'INFO' if update_count > 50 else 'OK',
                     'detail': f'{update_count} package(s) pending',
+                    'error_key': 'pending_updates'
                 },
                 'kernel_pve': {
                     'status': kernel_status,
                     'detail': f'{len(kernel_pve_updates_packages)} kernel/PVE update(s)' if kernel_pve_updates_packages else 'Kernel/PVE up to date',
+                    'error_key': 'kernel_pve'
                 }
             }
             
@@ -2695,13 +2704,19 @@ class HealthMonitor:
             # Persist errors and respect dismiss for each sub-check
             dismissed_keys = set()
             security_sub_checks = {
-                'security_login_attempts': checks.get('login_attempts', {}),
-                'security_certificates': checks.get('certificates', {}),
-                'security_uptime': checks.get('uptime', {}),
-                'security_fail2ban': checks.get('fail2ban', {}),
+                'security_login_attempts': 'login_attempts',
+                'security_certificates': 'certificates',
+                'security_uptime': 'uptime',
+                'security_fail2ban': 'fail2ban',
             }
             
-            for err_key, check_info in security_sub_checks.items():
+            # Inject error_key into each check so the frontend knows which DB key to use
+            for err_key, check_name in security_sub_checks.items():
+                if check_name in checks:
+                    checks[check_name]['error_key'] = err_key
+            
+            for err_key, check_name in security_sub_checks.items():
+                check_info = checks.get(check_name, {})
                 check_status = check_info.get('status', 'OK')
                 if check_status not in ('OK', 'INFO'):
                     is_dismissable = check_info.get('dismissable', True)

AppImage/scripts/health_persistence.py

@@ -410,6 +410,54 @@ class HealthPersistence:
         
         result = {'success': False, 'error_key': error_key}
         
+        if not row:
+            # Error not in DB yet -- create a minimal record so the dismiss persists.
+            # Try to infer category from the error_key prefix.
+            category = ''
+            for cat, prefix in [('security', 'security_'), ('updates', 'security_updates'),
+                                ('updates', 'update_'), ('updates', 'kernel_'),
+                                ('updates', 'pending_'), ('updates', 'system_age'),
+                                ('pve_services', 'pve_service_'), ('vms', 'vm_'), ('vms', 'ct_'),
+                                ('disks', 'disk_'), ('logs', 'log_'), ('network', 'net_'),
+                                ('temperature', 'temp_')]:
+                if error_key.startswith(prefix) or error_key == prefix:
+                    category = cat
+                    break
+            
+            setting_key = self.CATEGORY_SETTING_MAP.get(category, '')
+            sup_hours = self.DEFAULT_SUPPRESSION_HOURS
+            if setting_key:
+                stored = self.get_setting(setting_key)
+                if stored is not None:
+                    try:
+                        sup_hours = int(stored)
+                    except (ValueError, TypeError):
+                        pass
+            
+            cursor.execute('''
+                INSERT INTO errors (error_key, category, severity, reason, first_seen, last_seen,
+                                    occurrence_count, acknowledged, resolved_at, suppression_hours)
+                VALUES (?, ?, 'WARNING', 'Dismissed by user', ?, ?, 1, 1, ?, ?)
+            ''', (error_key, category, now, now, now, sup_hours))
+            
+            self._record_event(cursor, 'acknowledged', error_key, {
+                'original_severity': 'WARNING',
+                'category': category,
+                'suppression_hours': sup_hours
+            })
+            
+            result = {
+                'success': True,
+                'error_key': error_key,
+                'original_severity': 'WARNING',
+                'category': category,
+                'suppression_hours': sup_hours,
+                'acknowledged_at': now
+            }
+            conn.commit()
+            conn.close()
+            return result
+        
         if row:
             error_dict = dict(row)
             original_severity = error_dict.get('severity', 'WARNING')