feat: migrate to Next.js for Mini App and enhance project structure

- Replaced the previous webapp with a new Mini App built using Next.js, improving performance and maintainability.
- Updated the `.gitignore` to exclude Next.js build artifacts and node modules.
- Revised documentation in `AGENTS.md`, `README.md`, and `architecture.md` to reflect the new Mini App structure and technology stack.
- Enhanced Dockerfile to support the new build process for the Next.js application.
- Updated CI workflow to build and test the Next.js application.
- Added new configuration options for the Mini App, including `MINI_APP_SHORT_NAME` for improved deep linking.
- Refactored frontend testing setup to accommodate the new structure and testing framework.
- Removed legacy webapp files and dependencies to streamline the project.

webapp-next/src/lib/current-duty.test.ts

@@ -0,0 +1,87 @@
+/**
+ * Unit tests for current-duty: getRemainingTime, findCurrentDuty.
+ * Ported from webapp/js/currentDuty.test.js.
+ */
+
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { getRemainingTime, findCurrentDuty } from "./current-duty";
+import type { DutyWithUser } from "@/types";
+
+describe("getRemainingTime", () => {
+  it("returns hours and minutes until end from now", () => {
+    const endAt = "2025-03-02T17:30:00.000Z";
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2025-03-02T12:00:00.000Z"));
+    const { hours, minutes } = getRemainingTime(endAt);
+    vi.useRealTimers();
+    expect(hours).toBe(5);
+    expect(minutes).toBe(30);
+  });
+
+  it("returns 0 when end is in the past", () => {
+    const endAt = "2025-03-02T09:00:00.000Z";
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2025-03-02T12:00:00.000Z"));
+    const { hours, minutes } = getRemainingTime(endAt);
+    vi.useRealTimers();
+    expect(hours).toBe(0);
+    expect(minutes).toBe(0);
+  });
+
+  it("returns 0 hours and 0 minutes when endAt is invalid", () => {
+    const { hours, minutes } = getRemainingTime("not-a-date");
+    expect(hours).toBe(0);
+    expect(minutes).toBe(0);
+  });
+});
+
+describe("findCurrentDuty", () => {
+  it("returns duty when now is between start_at and end_at", () => {
+    const now = new Date();
+    const start = new Date(now);
+    start.setHours(start.getHours() - 1, 0, 0, 0);
+    const end = new Date(now);
+    end.setHours(end.getHours() + 1, 0, 0, 0);
+    const duties: DutyWithUser[] = [
+      {
+        id: 1,
+        user_id: 1,
+        event_type: "duty",
+        full_name: "Иванов",
+        start_at: start.toISOString(),
+        end_at: end.toISOString(),
+        phone: null,
+        username: null,
+      },
+    ];
+    const duty = findCurrentDuty(duties);
+    expect(duty).not.toBeNull();
+    expect(duty?.full_name).toBe("Иванов");
+  });
+
+  it("returns null when no duty overlaps current time", () => {
+    const duties: DutyWithUser[] = [
+      {
+        id: 1,
+        user_id: 1,
+        event_type: "duty",
+        full_name: "Past",
+        start_at: "2020-01-01T09:00:00Z",
+        end_at: "2020-01-01T17:00:00Z",
+        phone: null,
+        username: null,
+      },
+      {
+        id: 2,
+        user_id: 2,
+        event_type: "duty",
+        full_name: "Future",
+        start_at: "2030-01-01T09:00:00Z",
+        end_at: "2030-01-01T17:00:00Z",
+        phone: null,
+        username: null,
+      },
+    ];
+    expect(findCurrentDuty(duties)).toBeNull();
+  });
+});