feat: add frontend API clients for device types and network diagrams

Adds deviceTypesApi (list, create, update, remove) and networkDiagramsApi
(list, get, create, update, archive, duplicate, exportJson, importJson,
aiGenerate, listClients) following the existing apiClient module pattern.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/api/deviceTypes.ts

@@ -0,0 +1,23 @@
+import apiClient from './client'
+import type { DeviceTypeResponse, DeviceTypeCreate } from '@/types'
+
+export const deviceTypesApi = {
+  async list(): Promise<DeviceTypeResponse[]> {
+    const response = await apiClient.get<DeviceTypeResponse[]>('/device-types/')
+    return response.data
+  },
+
+  async create(data: DeviceTypeCreate): Promise<DeviceTypeResponse> {
+    const response = await apiClient.post<DeviceTypeResponse>('/device-types/', data)
+    return response.data
+  },
+
+  async update(id: string, data: Partial<DeviceTypeCreate>): Promise<DeviceTypeResponse> {
+    const response = await apiClient.put<DeviceTypeResponse>(`/device-types/${id}`, data)
+    return response.data
+  },
+
+  async remove(id: string): Promise<void> {
+    await apiClient.delete(`/device-types/${id}`)
+  },
+}

frontend/src/api/index.ts

@@ -35,3 +35,5 @@ export { betaFeedbackApi } from './betaFeedback'
 export { branchesApi } from './branches'
 export { handoffsApi } from './handoffs'
 export { resolutionsApi } from './resolutions'
+export { deviceTypesApi } from './deviceTypes'
+export { networkDiagramsApi } from './networkDiagrams'

frontend/src/api/networkDiagrams.ts

@@ -0,0 +1,63 @@
+import apiClient from './client'
+import type {
+  NetworkDiagramResponse,
+  NetworkDiagramListItem,
+  NetworkDiagramCreate,
+  NetworkDiagramUpdate,
+  AIGenerateRequest,
+  AIGenerateResponse,
+  DiagramImportData,
+  DiagramImportResponse,
+  DiagramExportResponse,
+} from '@/types'
+
+export const networkDiagramsApi = {
+  async list(params?: { client_name?: string; search?: string }): Promise<NetworkDiagramListItem[]> {
+    const response = await apiClient.get<NetworkDiagramListItem[]>('/network-diagrams/', { params })
+    return response.data
+  },
+
+  async get(id: string): Promise<NetworkDiagramResponse> {
+    const response = await apiClient.get<NetworkDiagramResponse>(`/network-diagrams/${id}`)
+    return response.data
+  },
+
+  async create(data: NetworkDiagramCreate): Promise<NetworkDiagramResponse> {
+    const response = await apiClient.post<NetworkDiagramResponse>('/network-diagrams/', data)
+    return response.data
+  },
+
+  async update(id: string, data: NetworkDiagramUpdate): Promise<NetworkDiagramResponse> {
+    const response = await apiClient.put<NetworkDiagramResponse>(`/network-diagrams/${id}`, data)
+    return response.data
+  },
+
+  async archive(id: string): Promise<void> {
+    await apiClient.delete(`/network-diagrams/${id}`)
+  },
+
+  async duplicate(id: string): Promise<NetworkDiagramResponse> {
+    const response = await apiClient.post<NetworkDiagramResponse>(`/network-diagrams/${id}/duplicate`)
+    return response.data
+  },
+
+  async exportJson(id: string): Promise<DiagramExportResponse> {
+    const response = await apiClient.get<DiagramExportResponse>(`/network-diagrams/${id}/export`)
+    return response.data
+  },
+
+  async importJson(data: DiagramImportData): Promise<DiagramImportResponse> {
+    const response = await apiClient.post<DiagramImportResponse>('/network-diagrams/import', data)
+    return response.data
+  },
+
+  async aiGenerate(data: AIGenerateRequest): Promise<AIGenerateResponse> {
+    const response = await apiClient.post<AIGenerateResponse>('/network-diagrams/ai-generate', data)
+    return response.data
+  },
+
+  async listClients(): Promise<string[]> {
+    const response = await apiClient.get<string[]>('/network-diagrams/clients')
+    return response.data
+  },
+}