feat: migrate to Cloudflare Workers with icon and version upload

Replace Express/SQLite and web/ with frontend/, worker/, and wrangler deploy. Add optional app icon upload, date-based app_version, and build-app workflow input.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/pages/BuildList.tsx

@@ -0,0 +1,45 @@
+import { useEffect, useState } from "react";
+import { Link } from "react-router-dom";
+import { fetchBuilds, statusLabel, type Build } from "../api/client";
+
+export default function BuildList() {
+  const [builds, setBuilds] = useState<Build[]>([]);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    fetchBuilds()
+      .then(setBuilds)
+      .catch((err) =>
+        setError(err instanceof Error ? err.message : "加载失败"),
+      );
+  }, []);
+
+  return (
+    <>
+      <h1 className="page-title">构建记录</h1>
+      <p className="page-lead">最近 20 条构建任务。</p>
+
+      <section className="doc-section">
+        {error ? <p className="error-text">{error}</p> : null}
+        {!error && builds.length === 0 ? (
+          <p className="prose">暂无构建记录。</p>
+        ) : null}
+        {builds.length > 0 ? (
+          <ul className="build-list">
+            {builds.map((build) => (
+              <li key={build.id}>
+                <Link to={`/jobs/${build.id}`}>
+                  {build.appName} ({build.appNameEn})
+                </Link>
+                <div className="meta-line">
+                  v{build.appVersion} · {build.id} · {statusLabel(build.status)}{" "}
+                  · {new Date(build.createdAt).toLocaleString()}
+                </div>
+              </li>
+            ))}
+          </ul>
+        ) : null}
+      </section>
+    </>
+  );
+}