feat: add Camera node type + flag RTSP/camera ports during scan

- New 'camera' node type with Camera icon (frontend + types)
- Scanner fingerprint: camera ports (554, 8554, 37777, 34567, 2020) now suggest 'camera' instead of 'iot'
- service_signatures.json: all camera/NVR entries updated to suggested_node_type=camera
- 'camera' added to priority list in suggest_node_type (above iot)

frontend/src/types/__tests__/types.test.ts

@@ -4,7 +4,7 @@ import type { CheckMethod } from '@/types'
 
 describe('NODE_TYPE_LABELS', () => {
   it('has an entry for every node type', () => {
-    const expectedTypes = ['isp', 'router', 'switch', 'server', 'proxmox', 'vm', 'lxc', 'nas', 'iot', 'ap', 'generic']
+    const expectedTypes = ['isp', 'router', 'switch', 'server', 'proxmox', 'vm', 'lxc', 'nas', 'iot', 'ap', 'camera', 'generic']
     expectedTypes.forEach((t) => {
       expect(NODE_TYPE_LABELS).toHaveProperty(t)
       expect(typeof NODE_TYPE_LABELS[t as keyof typeof NODE_TYPE_LABELS]).toBe('string')

frontend/src/types/index.ts

@@ -9,6 +9,7 @@ export type NodeType =
   | 'nas'
   | 'iot'
   | 'ap'
+  | 'camera'
   | 'generic'
 
 export type EdgeType = 'ethernet' | 'wifi' | 'iot' | 'vlan' | 'virtual' | 'cluster'
@@ -67,6 +68,7 @@ export const NODE_TYPE_LABELS: Record<NodeType, string> = {
   nas: 'NAS',
   iot: 'IoT Device',
   ap: 'Access Point',
+  camera: 'Camera',
   generic: 'Generic Device',
 }