feat: add software download center

assets/js/login.js

@@ -0,0 +1,61 @@
+const form = document.querySelector("#login-form");
+const nextInput = document.querySelector("#next-url");
+const statusEl = document.querySelector("#login-status");
+
+const params = new URLSearchParams(window.location.search);
+const requestedNext = params.get("next") || "/software.html";
+
+function safeNext(value) {
+  if (!value) return "/software.html";
+  if (value.startsWith("/") && !value.startsWith("//")) return value;
+  if (/^[a-z0-9._/-]+$/i.test(value)) return value;
+  return "/software.html";
+}
+
+function setStatus(message, type = "") {
+  statusEl.textContent = message;
+  statusEl.classList.toggle("is-error", type === "error");
+  statusEl.classList.toggle("is-ok", type === "ok");
+}
+
+async function checkExistingLogin() {
+  try {
+    const response = await fetch("/api/auth/me", { headers: { Accept: "application/json" } });
+    const payload = await response.json();
+    if (payload.authenticated) {
+      window.location.href = safeNext(requestedNext);
+    }
+  } catch {
+    setStatus("");
+  }
+}
+
+nextInput.value = safeNext(requestedNext);
+
+form.addEventListener("submit", async (event) => {
+  event.preventDefault();
+  const formData = new FormData(form);
+  const payload = Object.fromEntries(formData.entries());
+
+  try {
+    setStatus("正在登录...");
+    const response = await fetch("/api/auth/login", {
+      method: "POST",
+      headers: {
+        Accept: "application/json",
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify(payload),
+    });
+    const data = await response.json();
+    if (!response.ok) {
+      throw new Error(data.error || "登录失败");
+    }
+    setStatus("登录成功，正在跳转。", "ok");
+    window.location.href = safeNext(data.next || payload.next);
+  } catch (error) {
+    setStatus(error.message, "error");
+  }
+});
+
+checkExistingLogin();