feat(services): add Service Types management UI

Admin CRUD page for service types, plus wiring the student "request
service" form's category select to the real list instead of a
hardcoded pair of options.

src/services/api/endpoints.js

@@ -55,6 +55,14 @@ export const endpoints = {
   getStudentCertificates: '/student/certificates',
   downloadStudentCertificate: '/student/certificates/:id/download',
 
+  // ─── Backend-aligned: Service types (settings) ────────────────────────────
+  // Read is open to any authenticated role (populates the student "request
+  // service" category select); create/update/delete are admin-only.
+  getServiceTypesList: '/service-types',
+  addServiceType: '/service-types',
+  updateServiceType: '/service-types/:id',
+  deleteServiceType: '/service-types/:id',
+
   // ─── Per-role aggregated dashboards ────────────────────────────────────────
   // Each requires the matching role's token; backend scopes the payload.
   getAdminDashboard: '/admin/dashboard',

src/services/api/service-types.js

@@ -0,0 +1,12 @@
+import { http } from '@/services/api/http'
+import { buildUrl, endpoints } from '@/services/api/endpoints'
+
+export const apiGetServiceTypes = () => http.get(endpoints.getServiceTypesList)
+
+export const apiAddServiceType = (payload) => http.post(endpoints.addServiceType, payload)
+
+export const apiUpdateServiceType = (id, payload) =>
+  http.patch(buildUrl(endpoints.updateServiceType, { id }), payload)
+
+export const apiDeleteServiceType = (id) =>
+  http.delete(buildUrl(endpoints.deleteServiceType, { id }))

src/services/query/service-types.js

@@ -0,0 +1,29 @@
+import { useMutation, useQuery } from '@tanstack/vue-query'
+import {
+  apiAddServiceType,
+  apiDeleteServiceType,
+  apiGetServiceTypes,
+  apiUpdateServiceType,
+} from '@/services/api/service-types'
+
+export const serviceTypesKeys = {
+  all: ['service-types'],
+  list: () => ['service-types', 'list'],
+}
+
+export const useServiceTypesListQuery = (options = {}) =>
+  useQuery({
+    queryKey: serviceTypesKeys.list(),
+    queryFn: () => apiGetServiceTypes(),
+    select: (response) => response?.data ?? response ?? [],
+    ...options,
+  })
+
+export const useAddServiceTypeMutation = () =>
+  useMutation({ mutationFn: (payload) => apiAddServiceType(payload) })
+
+export const useUpdateServiceTypeMutation = () =>
+  useMutation({ mutationFn: ({ id, payload }) => apiUpdateServiceType(id, payload) })
+
+export const useDeleteServiceTypeMutation = () =>
+  useMutation({ mutationFn: (id) => apiDeleteServiceType(id) })