refactor: 重构ORPC模块结构与路由实现

- 更新导入路径以正确引用合约文件并重构导出结构。
- 使用 os 实例替换手动实现的 ORPC 处理函数，统一通过生成的合约接口调用并集成数据库中间件。
- 使用服务器实例的路由功能替换原有的路由定义。
- 添加ORPC服务器实现，基于合约定义并指定空上下文类型。
- 修正导入路径，将 './contracts' 更新为 './contract' 以匹配实际文件路径。

src/orpc/contract.ts

@@ -1,4 +1,4 @@
-import { todoContract } from './todo'
+import { todoContract } from './contracts/todo'
 
 export const contract = {
   todo: todoContract,

src/orpc/handlers/todo.ts

@@ -1,10 +1,10 @@
-import { implement, ORPCError } from '@orpc/server'
+import { ORPCError } from '@orpc/server'
 import { eq } from 'drizzle-orm'
 import { todoTable } from '@/db/schema'
 import { dbProvider } from '@/orpc/middlewares'
-import { contract } from '../contracts'
+import { os } from '@/orpc/server'
 
-export const list = implement(contract.todo.list)
+export const list = os.todo.list
   .use(dbProvider)
   .handler(async ({ context }) => {
     const todos = await context.db.query.todoTable.findMany({
@@ -13,7 +13,7 @@ export const list = implement(contract.todo.list)
     return todos
   })
 
-export const create = implement(contract.todo.create)
+export const create = os.todo.create
   .use(dbProvider)
   .handler(async ({ context, input }) => {
     const [newTodo] = await context.db
@@ -28,7 +28,7 @@ export const create = implement(contract.todo.create)
     return newTodo
   })
 
-export const update = implement(contract.todo.update)
+export const update = os.todo.update
   .use(dbProvider)
   .handler(async ({ context, input }) => {
     const [updatedTodo] = await context.db
@@ -44,7 +44,7 @@ export const update = implement(contract.todo.update)
     return updatedTodo
   })
 
-export const remove = implement(contract.todo.remove)
+export const remove = os.todo.remove
   .use(dbProvider)
   .handler(async ({ context, input }) => {
     await context.db.delete(todoTable).where(eq(todoTable.id, input.id))

src/orpc/router.ts

@@ -1,5 +1,6 @@
 import * as todo from './handlers/todo'
+import { os } from './server'
 
-export const router = {
+export const router = os.router({
   todo,
-}
+})

src/orpc/server.ts

@@ -0,0 +1,7 @@
+import { implement } from '@orpc/server'
+import { contract } from './contract'
+
+// biome-ignore lint/complexity/noBannedTypes: 暂无 context
+export type ORPCContext = {}
+
+export const os = implement(contract).$context<ORPCContext>()

src/orpc/types.ts

@@ -3,7 +3,7 @@ import type {
   InferContractRouterInputs,
   InferContractRouterOutputs,
 } from '@orpc/contract'
-import type { contract } from './contracts'
+import type { contract } from './contract'
 
 export type Contract = typeof contract
 export type RouterClient = ContractRouterClient<Contract>