refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

frontend/app/(main)/files/page.tsx

@@ -0,0 +1,33 @@
+"use client"
+
+import * as React from "react"
+import {motion} from "motion/react"
+
+import {RequireAuth} from "@/components/auth/require-auth"
+import {UserFileManager} from "@/components/common/user/file-manager"
+import {FolderOpen} from "lucide-react"
+
+export default function UserFilesPage() {
+  return (
+    <RequireAuth>
+    <motion.div
+      initial={{ opacity: 0, y: 15 }}
+      animate={{ opacity: 1, y: 0 }}
+      transition={{ duration: 0.35, ease: "easeOut" }}
+      className="flex w-full flex-col gap-6 py-6"
+    >
+      {/* 顶部标题区 */}
+      <div className="flex flex-col md:flex-row md:items-center justify-between gap-4 pb-5">
+        <div className="flex items-center gap-2">
+          <FolderOpen className="size-5 text-primary" />
+          <div>
+            <h1 className="text-2xl font-semibold tracking-tight">我的文件</h1>
+          </div>
+        </div>
+      </div>
+
+      <UserFileManager />
+    </motion.div>
+    </RequireAuth>
+  )
+}