feat: implement dashboard mockup and route

src/web/router.test.ts

@@ -13,6 +13,13 @@ describe("Web Router", () => {
         expect(text).toContain('id="uptime-display"');
     });
 
+    it("should return dashboard page on /dashboard", async () => {
+        const req = new Request("http://localhost/dashboard");
+        const res = await router(req);
+        expect(res.status).toBe(200);
+        expect(await res.text()).toContain("Live Activity");
+    });
+
     it("should return health check on /health", async () => {
         const req = new Request("http://localhost/health");
         const res = await router(req);