refactor: 重构待办事项模块，统一路由与数据操作逻辑

- 将客户端导出改为私有常量，避免外部直接访问。
- 添加待办事项的完整 CRUD 操作，包括列表查询、创建、更新和删除功能，并使用 Zod 进行输入输出验证和 Drizzle ORM 操作数据库。
- 导出客户端和路由器模块的公共接口
- 添加路由配置，将 todo 处理程序注册到路由系统中。
- 删除已废弃的路由定义文件
- 删除待办事项相关路由和接口定义
- 删除未使用的 TodoSchema 模式定义以清理代码库。
- 将 Todo 路由重命名为复数形式并迁移数据获取与操作逻辑至 Orpc 客户端调用
- 将路由名称和路径从 `/todo` 更新为 `/todos`，并同步更新相关类型定义和引用。

src/orpc/client.ts

@@ -22,6 +22,6 @@ const getORPCClient = createIsomorphicFn()
     return createORPCClient(link)
   })
 
-export const client: RouterClient<typeof router> = getORPCClient()
+const client: RouterClient<typeof router> = getORPCClient()
 
 export const orpc = createTanstackQueryUtils(client)

src/orpc/handlers/todo.ts

@@ -0,0 +1,83 @@
+import { ORPCError, os } from '@orpc/server'
+import { eq } from 'drizzle-orm'
+import {
+  createInsertSchema,
+  createSelectSchema,
+  createUpdateSchema,
+} from 'drizzle-zod'
+import { z } from 'zod'
+import { db } from '@/db'
+import { todoTable } from '@/db/schema'
+
+const selectSchema = createSelectSchema(todoTable)
+
+const insertSchema = createInsertSchema(todoTable).omit({
+  id: true,
+  createdAt: true,
+  updatedAt: true,
+})
+
+const updateSchema = createUpdateSchema(todoTable).omit({
+  id: true,
+  createdAt: true,
+  updatedAt: true,
+})
+
+export const list = os
+  .input(z.void())
+  .output(z.array(selectSchema))
+  .handler(async () => {
+    const todos = await db.query.todoTable.findMany({
+      orderBy: (todos, { desc }) => [desc(todos.createdAt)],
+    })
+    return todos
+  })
+
+export const create = os
+  .input(insertSchema)
+  .output(selectSchema)
+  .handler(async ({ input }) => {
+    const [newTodo] = await db
+      .insert(todoTable)
+      .values({ title: input.title })
+      .returning()
+
+    if (!newTodo) {
+      throw new ORPCError('NOT_FOUND')
+    }
+
+    return newTodo
+  })
+
+export const update = os
+  .input(
+    z.object({
+      id: z.uuid(),
+      data: updateSchema,
+    }),
+  )
+  .output(selectSchema)
+  .handler(async ({ input }) => {
+    const [updatedTodo] = await db
+      .update(todoTable)
+      .set(input.data)
+      .where(eq(todoTable.id, input.id))
+      .returning()
+
+    if (!updatedTodo) {
+      throw new ORPCError('NOT_FOUND')
+    }
+
+    return updatedTodo
+  })
+
+export const remove = os
+  .input(
+    z.object({
+      id: z.uuid(),
+    }),
+  )
+  .output(z.void())
+  .handler(async ({ input }) => {
+    await db.delete(todoTable).where(eq(todoTable.id, input.id))
+  })

src/orpc/index.ts

@@ -0,0 +1,2 @@
+export * from './client'
+export * from './router'

src/orpc/router.ts

@@ -0,0 +1,5 @@
+import * as todo from './handlers/todo'
+
+export const router = {
+  todo,
+}

src/orpc/router/index.ts

@@ -1,6 +0,0 @@
-import { addTodo, listTodos } from './todos'
-
-export const router = {
-  listTodos,
-  addTodo,
-}

src/orpc/router/todos.ts

@@ -1,20 +0,0 @@
-import { os } from '@orpc/server'
-import { z } from 'zod'
-
-const todos = [
-  { id: 1, name: 'Get groceries' },
-  { id: 2, name: 'Buy a new phone' },
-  { id: 3, name: 'Finish the project' },
-]
-
-export const listTodos = os.input(z.object({})).handler(() => {
-  return todos
-})
-
-export const addTodo = os
-  .input(z.object({ name: z.string() }))
-  .handler(({ input }) => {
-    const newTodo = { id: todos.length + 1, name: input.name }
-    todos.push(newTodo)
-    return newTodo
-  })

src/orpc/schema.ts

@@ -1,6 +0,0 @@
-import { z } from 'zod'
-
-export const TodoSchema = z.object({
-  id: z.number().int().min(1),
-  name: z.string(),
-})