refactor: ♻️ 我的和登录页面优化，添加主题设置

src/types/todo.ts

@@ -0,0 +1,16 @@
+export interface Todo {
+  id: string;
+  title: string;
+  description?: string;
+  completed: boolean;
+  deadline?: string;
+  priority?: "low" | "medium" | "high";
+  createdAt: string;
+  updatedAt?: string;
+}
+
+export interface TodoState {
+  todos: Todo[];
+  loading: boolean;
+  error: string | null;
+}