Refactor all list APIs for server-side pagination, search, and sort

All list endpoints now return paginated responses:
  { data: [...], pagination: { page, limit, total, totalPages } }

Query params: ?page=1&limit=25&q=search&sort=name&order=asc

Changes:
- Added PaginationSchema in @forte/shared for consistent param parsing
- Added pagination utils (withPagination, withSort, buildSearchCondition,
  paginatedResponse) in backend
- Refactored all services: AccountService, MemberService, CategoryService,
  SupplierService, ProductService, InventoryUnitService
- Merged separate /search endpoints into list endpoints via ?q= param
- Removed AccountSearchSchema and ProductSearchSchema (replaced by
  PaginationSchema)
- Added pagination test (5 items, page 1 limit 2, expect totalPages=3)
- Updated CLAUDE.md with API conventions
- 34 tests passing

packages/backend/src/routes/v1/inventory.ts

@@ -4,6 +4,7 @@ import {
   CategoryUpdateSchema,
   SupplierCreateSchema,
   SupplierUpdateSchema,
+  PaginationSchema,
 } from '@forte/shared/schemas'
 import { CategoryService, SupplierService } from '../../services/inventory.service.js'
 
@@ -20,8 +21,9 @@ export const inventoryRoutes: FastifyPluginAsync = async (app) => {
   })
 
   app.get('/categories', { preHandler: [app.authenticate] }, async (request, reply) => {
-    const list = await CategoryService.list(app.db, request.companyId)
-    return reply.send(list)
+    const params = PaginationSchema.parse(request.query)
+    const result = await CategoryService.list(app.db, request.companyId, params)
+    return reply.send(result)
   })
 
   app.get('/categories/:id', { preHandler: [app.authenticate] }, async (request, reply) => {
@@ -61,15 +63,9 @@ export const inventoryRoutes: FastifyPluginAsync = async (app) => {
   })
 
   app.get('/suppliers', { preHandler: [app.authenticate] }, async (request, reply) => {
-    const list = await SupplierService.list(app.db, request.companyId)
-    return reply.send(list)
-  })
-
-  app.get('/suppliers/search', { preHandler: [app.authenticate] }, async (request, reply) => {
-    const { q } = request.query as { q?: string }
-    if (!q) return reply.status(400).send({ error: { message: 'Query parameter q is required', statusCode: 400 } })
-    const results = await SupplierService.search(app.db, request.companyId, q)
-    return reply.send(results)
+    const params = PaginationSchema.parse(request.query)
+    const result = await SupplierService.list(app.db, request.companyId, params)
+    return reply.send(result)
   })
 
   app.get('/suppliers/:id', { preHandler: [app.authenticate] }, async (request, reply) => {