Add categories and suppliers with CRUD routes

- category table with hierarchical parent_id, sort ordering, soft-delete
- supplier table with contact info, account number, payment terms
- CRUD routes for both with search on suppliers
- Zod validation schemas in @forte/shared
- Products will link to suppliers via join table (many-to-many)
- 26 tests passing

packages/backend/src/services/inventory.service.ts

@@ -0,0 +1,109 @@
+import { eq, and, ilike } from 'drizzle-orm'
+import type { PostgresJsDatabase } from 'drizzle-orm/postgres-js'
+import { categories, suppliers } from '../db/schema/inventory.js'
+import type {
+  CategoryCreateInput,
+  CategoryUpdateInput,
+  SupplierCreateInput,
+  SupplierUpdateInput,
+} from '@forte/shared/schemas'
+
+export const CategoryService = {
+  async create(db: PostgresJsDatabase, companyId: string, input: CategoryCreateInput) {
+    const [category] = await db
+      .insert(categories)
+      .values({ companyId, ...input })
+      .returning()
+    return category
+  },
+
+  async getById(db: PostgresJsDatabase, companyId: string, id: string) {
+    const [category] = await db
+      .select()
+      .from(categories)
+      .where(and(eq(categories.id, id), eq(categories.companyId, companyId)))
+      .limit(1)
+    return category ?? null
+  },
+
+  async list(db: PostgresJsDatabase, companyId: string) {
+    return db
+      .select()
+      .from(categories)
+      .where(and(eq(categories.companyId, companyId), eq(categories.isActive, true)))
+      .orderBy(categories.sortOrder)
+  },
+
+  async update(db: PostgresJsDatabase, companyId: string, id: string, input: CategoryUpdateInput) {
+    const [category] = await db
+      .update(categories)
+      .set({ ...input, updatedAt: new Date() })
+      .where(and(eq(categories.id, id), eq(categories.companyId, companyId)))
+      .returning()
+    return category ?? null
+  },
+
+  async softDelete(db: PostgresJsDatabase, companyId: string, id: string) {
+    const [category] = await db
+      .update(categories)
+      .set({ isActive: false, updatedAt: new Date() })
+      .where(and(eq(categories.id, id), eq(categories.companyId, companyId)))
+      .returning()
+    return category ?? null
+  },
+}
+
+export const SupplierService = {
+  async create(db: PostgresJsDatabase, companyId: string, input: SupplierCreateInput) {
+    const [supplier] = await db
+      .insert(suppliers)
+      .values({ companyId, ...input })
+      .returning()
+    return supplier
+  },
+
+  async getById(db: PostgresJsDatabase, companyId: string, id: string) {
+    const [supplier] = await db
+      .select()
+      .from(suppliers)
+      .where(and(eq(suppliers.id, id), eq(suppliers.companyId, companyId)))
+      .limit(1)
+    return supplier ?? null
+  },
+
+  async list(db: PostgresJsDatabase, companyId: string) {
+    return db
+      .select()
+      .from(suppliers)
+      .where(and(eq(suppliers.companyId, companyId), eq(suppliers.isActive, true)))
+  },
+
+  async search(db: PostgresJsDatabase, companyId: string, query: string) {
+    const pattern = `%${query}%`
+    return db
+      .select()
+      .from(suppliers)
+      .where(
+        and(eq(suppliers.companyId, companyId), eq(suppliers.isActive, true), ilike(suppliers.name, pattern)),
+      )
+      .limit(50)
+  },
+
+  async update(db: PostgresJsDatabase, companyId: string, id: string, input: SupplierUpdateInput) {
+    const [supplier] = await db
+      .update(suppliers)
+      .set({ ...input, updatedAt: new Date() })
+      .where(and(eq(suppliers.id, id), eq(suppliers.companyId, companyId)))
+      .returning()
+    return supplier ?? null
+  },
+
+  async softDelete(db: PostgresJsDatabase, companyId: string, id: string) {
+    const [supplier] = await db
+      .update(suppliers)
+      .set({ isActive: false, updatedAt: new Date() })
+      .where(and(eq(suppliers.id, id), eq(suppliers.companyId, companyId)))
+      .returning()
+    return supplier ?? null
+  },
+}