feat: add service and FAQ API methods

Add createServiceApi (getServices, getServiceBySlug, getServiceCategories)
and createFaqApi (getFaqs, getFaqsByCategory) modules following existing
factory pattern. Wire into createPayloadClient as client.services and
client.faqs.

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

src/api-client/faqs.ts

@@ -0,0 +1,33 @@
+/**
+ * FAQ API functions
+ */
+import type { Faq } from '../types/collections'
+import type { PaginatedResponse, CollectionQueryParams } from '../types/api'
+import type { PayloadClient } from './client'
+
+export function createFaqApi(client: PayloadClient) {
+  return {
+    /**
+     * Get all FAQs for the current tenant
+     */
+    async getFaqs(options?: CollectionQueryParams): Promise<PaginatedResponse<Faq>> {
+      return client.getCollection<Faq>('faqs', {
+        ...options,
+        limit: options?.limit ?? 100,
+        sort: options?.sort ?? 'order',
+      })
+    },
+
+    /**
+     * Get FAQs filtered by category string (e.g. "allgemein", "kardiologie")
+     */
+    async getFaqsByCategory(category: string, options?: Pick<CollectionQueryParams, 'locale' | 'depth'>): Promise<PaginatedResponse<Faq>> {
+      return client.getCollection<Faq>('faqs', {
+        ...options,
+        where: { 'category][equals': category },
+        limit: 100,
+        sort: 'order',
+      })
+    },
+  }
+}

src/api-client/index.ts

@@ -18,6 +18,8 @@ import { createPageApi } from './pages'
 import { createPostApi } from './posts'
 import { createNavigationApi } from './navigation'
 import { createSettingsApi } from './settings'
+import { createServiceApi } from './services'
+import { createFaqApi } from './faqs'
 
 export type { PayloadClientConfig } from './client'
 export { PayloadClient, PayloadAPIError } from './client'
@@ -41,6 +43,12 @@ export function createPayloadClient(config: PayloadClientConfig) {
     /** Site settings, SEO, cookie config */
     settings: createSettingsApi(client),
 
+    /** Service & service category queries */
+    services: createServiceApi(client),
+
+    /** FAQ queries */
+    faqs: createFaqApi(client),
+
     /**
      * Generic collection query — use for collections not covered above
      *

src/api-client/services.ts

@@ -0,0 +1,54 @@
+/**
+ * Service & Service Category API functions
+ */
+import type { Service, ServiceCategory } from '../types/collections'
+import type { PaginatedResponse, CollectionQueryParams } from '../types/api'
+import type { PayloadClient } from './client'
+
+export interface ServiceQueryOptions extends CollectionQueryParams {
+  category?: number | string
+  isFeatured?: boolean
+}
+
+export function createServiceApi(client: PayloadClient) {
+  return {
+    /**
+     * Get all active services, optionally filtered by category
+     */
+    async getServices(options?: ServiceQueryOptions): Promise<PaginatedResponse<Service>> {
+      const where: Record<string, unknown> = {}
+      if (options?.category) where['category][equals'] = options.category
+      if (options?.isFeatured) where['isFeatured][equals'] = true
+
+      return client.getCollection<Service>('services', {
+        ...options,
+        sort: options?.sort ?? 'order',
+        where: { ...where, ...options?.where },
+      })
+    },
+
+    /**
+     * Get a single service by slug
+     */
+    async getServiceBySlug(slug: string, options?: Pick<CollectionQueryParams, 'locale' | 'depth'>): Promise<Service | null> {
+      const result = await client.getCollection<Service>('services', {
+        ...options,
+        depth: options?.depth ?? 3,
+        where: { 'slug][equals': slug },
+        limit: 1,
+      })
+      return result.docs[0] ?? null
+    },
+
+    /**
+     * Get all service categories
+     */
+    async getServiceCategories(options?: Pick<CollectionQueryParams, 'locale' | 'depth'>): Promise<PaginatedResponse<ServiceCategory>> {
+      return client.getCollection<ServiceCategory>('service-categories', {
+        ...options,
+        limit: 100,
+        sort: 'order',
+      })
+    },
+  }
+}