Add core components for task management and navigation

This commit introduces the foundational UI components and logic for the task management application, including task creation, calendar views, Kanban boards, and navigation elements.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/yy9YLEW

server/storage.ts

@@ -0,0 +1,38 @@
+import { type User, type InsertUser } from "@shared/schema";
+import { randomUUID } from "crypto";
+
+// modify the interface with any CRUD methods
+// you might need
+
+export interface IStorage {
+  getUser(id: string): Promise<User | undefined>;
+  getUserByUsername(username: string): Promise<User | undefined>;
+  createUser(user: InsertUser): Promise<User>;
+}
+
+export class MemStorage implements IStorage {
+  private users: Map<string, User>;
+
+  constructor() {
+    this.users = new Map();
+  }
+
+  async getUser(id: string): Promise<User | undefined> {
+    return this.users.get(id);
+  }
+
+  async getUserByUsername(username: string): Promise<User | undefined> {
+    return Array.from(this.users.values()).find(
+      (user) => user.username === username,
+    );
+  }
+
+  async createUser(insertUser: InsertUser): Promise<User> {
+    const id = randomUUID();
+    const user: User = { ...insertUser, id };
+    this.users.set(id, user);
+    return user;
+  }
+}
+
+export const storage = new MemStorage();