feat: Banner UI美化 & 新增文章/公告/图库/媒体管理等功能

- Banner: Ken Burns缩放动效、左右导航箭头、进度条指示器、hover暂停、暗角遮罩、shimmer按钮动画
- 新增文章管理(CRUD)与公开文章页
- 新增Banner/Gallery图片管理API
- 新增媒体管理页面
- 新增更新日志页面
- 新增页面访问追踪
- 新增Markdown渲染组件
- .gitignore排除.cursor目录

Made-with: Cursor

src/app/api/gallery/route.ts

@@ -0,0 +1,31 @@
+import { NextRequest, NextResponse } from "next/server";
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/db";
+
+export async function GET(request: NextRequest) {
+  const enabledOnly = request.nextUrl.searchParams.get("enabled") === "1";
+  const where = enabledOnly ? { enabled: true } : {};
+  const images = await prisma.galleryImage.findMany({
+    where,
+    orderBy: { sortOrder: "asc" },
+  });
+  return NextResponse.json(images);
+}
+
+export async function POST(request: NextRequest) {
+  const session = await auth();
+  if (!session?.user) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const body = await request.json();
+  const image = await prisma.galleryImage.create({
+    data: {
+      imageUrl: body.imageUrl,
+      title: body.title ?? "",
+      sortOrder: body.sortOrder ?? 0,
+      enabled: body.enabled ?? true,
+    },
+  });
+  return NextResponse.json(image);
+}