test: add unit tests for various components and utilities

- Created tests for formatBytes function to ensure correct formatting of byte values.
- Implemented tests for InjectContext to validate resource injection and cleanup.
- Added tests for logo-class helpers to verify platform alias mappings.
- Developed tests for nezha-api functions to check API response handling.
- Introduced tests for static geographic data to validate country coordinates and GeoJSON structure.
- Created comprehensive tests for utility functions including date formatting and public note parsing.
- Added tests for Server page to ensure correct rendering and functionality.
- Implemented tests for simple pages including error handling and navigation.
- Set up testing environment with Vitest and configured coverage reporting.

src/test/lib/logo-class.test.tsx

@@ -0,0 +1,39 @@
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+
+import {
+	GetFontLogoClass,
+	GetOsName,
+	MageMicrosoftWindows,
+} from "@/lib/logo-class";
+
+describe("logo-class helpers", () => {
+	it("maps known platform aliases to font logo classes", () => {
+		expect(GetFontLogoClass("ubuntu")).toBe("ubuntu");
+		expect(GetFontLogoClass("darwin")).toBe("apple");
+		expect(GetFontLogoClass("linux")).toBe("tux");
+		expect(GetFontLogoClass("amazon")).toBe("redhat");
+		expect(GetFontLogoClass("arch")).toBe("archlinux");
+		expect(GetFontLogoClass("opensuse-tumbleweed")).toBe("opensuse");
+		expect(GetFontLogoClass("unknown")).toBe("tux");
+	});
+
+	it("maps platform aliases to readable operating system names", () => {
+		expect(GetOsName("ubuntu")).toBe("Ubuntu");
+		expect(GetOsName("darwin")).toBe("macOS");
+		expect(GetOsName("linux")).toBe("Linux");
+		expect(GetOsName("amazon")).toBe("Redhat");
+		expect(GetOsName("arch")).toBe("Archlinux");
+		expect(GetOsName("opensuse-tumbleweed")).toBe("Opensuse");
+		expect(GetOsName("unknown")).toBe("Linux");
+	});
+
+	it("renders the Windows SVG icon", () => {
+		render(<MageMicrosoftWindows data-testid="windows-icon" />);
+
+		expect(screen.getByTestId("windows-icon")).toHaveAttribute(
+			"viewBox",
+			"0 0 24 24",
+		);
+	});
+});