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/routes/todos.tsx

@@ -1,97 +1,21 @@
 import { useMutation, useSuspenseQuery } from '@tanstack/react-query'
 import { createFileRoute } from '@tanstack/react-router'
-import { createServerFn } from '@tanstack/react-start'
-import { eq } from 'drizzle-orm'
 import type { ChangeEvent, FormEvent } from 'react'
 import { useState } from 'react'
-import { z } from 'zod'
-import { db } from '@/db'
-import { todoTable } from '@/db/schema'
+import { orpc } from '@/orpc'
 
-const createTodoSchema = z.object({
-  title: z.string().min(1, '标题不能为空'),
-})
-
-const updateTodoSchema = z.object({
-  id: z.uuid(),
-  completed: z.boolean(),
-})
-
-const deleteTodoSchema = z.object({
-  id: z.uuid(),
-})
-
-const getTodos = createServerFn({ method: 'GET' }).handler(async () => {
-  const todos = await db.query.todoTable.findMany({
-    orderBy: (todos, { desc }) => [desc(todos.createdAt)],
-  })
-  return todos
-})
-
-const createTodo = createServerFn({ method: 'POST' })
-  .inputValidator(createTodoSchema)
-  .handler(async ({ data }) => {
-    const [newTodo] = await db
-      .insert(todoTable)
-      .values({ title: data.title })
-      .returning()
-    return newTodo
-  })
-
-const updateTodo = createServerFn({ method: 'POST' })
-  .inputValidator(updateTodoSchema)
-  .handler(async ({ data }) => {
-    const [updatedTodo] = await db
-      .update(todoTable)
-      .set({ completed: data.completed })
-      .where(eq(todoTable.id, data.id))
-      .returning()
-    return updatedTodo
-  })
-
-const deleteTodo = createServerFn({ method: 'POST' })
-  .inputValidator(deleteTodoSchema)
-  .handler(async ({ data }) => {
-    await db.delete(todoTable).where(eq(todoTable.id, data.id))
-    return { success: true }
-  })
-
-export const Route = createFileRoute('/todo')({
+export const Route = createFileRoute('/todos')({
   component: Todo,
 })
 
 function Todo() {
   const [newTodoTitle, setNewTodoTitle] = useState('')
-  const { data: todos, refetch } = useSuspenseQuery({
-    queryKey: ['todos'],
-    queryFn: () => getTodos(),
-  })
 
-  // Mutations
-  const createMutation = useMutation({
-    mutationFn: (title: string) => createTodo({ data: { title } }),
-    onSuccess: () => {
-      setNewTodoTitle('')
-      refetch()
-    },
-  })
+  const listQuery = useSuspenseQuery(orpc.todo.list.queryOptions())
+  const createMutation = useMutation(orpc.todo.create.mutationOptions())
+  const updateMutation = useMutation(orpc.todo.update.mutationOptions())
+  const deleteMutation = useMutation(orpc.todo.remove.mutationOptions())
 
-  const updateMutation = useMutation({
-    mutationFn: ({ id, completed }: { id: string; completed: boolean }) =>
-      updateTodo({ data: { id, completed } }),
-    onSuccess: () => {
-      refetch()
-    },
-  })
-
-  const deleteMutation = useMutation({
-    mutationFn: (id: string) => deleteTodo({ data: { id } }),
-    onSuccess: () => {
-      refetch()
-    },
-  })
-
-  // Handlers
   const handleCreateTodo = (e: FormEvent<HTMLFormElement>) => {
     e.preventDefault()
     if (newTodoTitle.trim()) {