feat: 视频缩略图生成、最近文件面板与前端视图重构

- 新增 VideoThumbnailService，基于 ffmpeg 截取视频缩略图，ffprobe 提取时长 - 新增 ManagedThumbnailMap 模型及多数据库迁移，存储缩略图元数据 - 新增 /api/thumbnails/{id} 缩略图流端点 - 新增最近添加/最近播放 API 与前端面板，支持列表/网格双视图切换 - FileRecordDto 扩展 thumbnailUrl、videoDuration、lastPlayedAt 字段 - 前端新增文件库 Tab 导航、卡片网格视图、视频海报与时长信息栏 - 添加文件库目录不再同步全量扫描，改为后台异步自动扫描
2026-05-22 17:01:49 +08:00
parent 6acc92ca27
commit 2c20f9bb54
47 changed files with 5975 additions and 64 deletions
@@ -43,6 +43,35 @@ namespace FileShare_API.Extensions
                .WithName("StreamManagedFileById")
                .WithTags("FileLibrary");

+            app.MapMethods(
+                    "/api/thumbnails/{id:int}",
+                    ["GET", "HEAD"],
+                    async (int id, IThumbnailStreamService thumbnailStreamService, HttpContext httpContext) =>
+                    {
+                        var thumbnail = await thumbnailStreamService.GetThumbnailAsync(id);
+                        if (thumbnail is null)
+                        {
+                            return Results.NotFound();
+                        }
+
+                        var stream = System.IO.File.Open(
+                            thumbnail.FilePath,
+                            FileMode.Open,
+                            FileAccess.Read,
+                            FileShare.ReadWrite);
+
+                        httpContext.Response.Headers.ContentDisposition =
+                            $"inline; filename=\"{Uri.EscapeDataString(thumbnail.FileName)}\"";
+                        httpContext.Response.Headers.CacheControl = "public, max-age=3600";
+
+                        return Results.File(
+                            stream,
+                            contentType: thumbnail.ContentType,
+                            lastModified: thumbnail.LastModified);
+                    })
+                .WithName("StreamManagedThumbnailById")
+                .WithTags("FileLibrary");
+
            return app;
        }
    }