Refactor global configuration page and navigation; add media library page; enhance streamer configuration with detailed options

- Removed the global configuration form and redirected to the consolidated settings page.
- Updated the dashboard to provide feedback when no streamers are configured and added edit links for each streamer.
- Introduced a new media library page to display media files from the configured archive root.
- Enhanced the streamer configuration page with additional options for overrides and settings, including a confirmation modal for deletion.
- Updated the layout and styles for improved user experience and navigation.
- Switched from file-based password storage to database-backed user credentials management in AuthService.
- Applied EF migrations on application startup to ensure database schema is up-to-date.

dotnet/src/TwitchArchive.Core/Config/GlobalConfig.cs

@@ -1,3 +1,4 @@
+using System.ComponentModel.DataAnnotations;
 using System.Text.Json.Serialization;
 
 namespace TwitchArchive.Core.Config
@@ -26,12 +27,98 @@ namespace TwitchArchive.Core.Config
         public string? UploadDestination { get; set; }
 
         [JsonPropertyName("refresh_interval_seconds")]
+        [Range(5, 86400, ErrorMessage = "Refresh interval must be between 5 and 86400 seconds.")]
         public int RefreshIntervalSeconds { get; set; } = 60;
 
         [JsonPropertyName("stream_segment_threads")]
+        [Range(1, 64, ErrorMessage = "Stream segment threads must be between 1 and 64.")]
         public int StreamSegmentThreads { get; set; } = 4;
 
         [JsonPropertyName("default_quality")]
         public string? DefaultQuality { get; set; } = "best";
+
+        // Defaults section for per-streamer fallbacks
+        [JsonPropertyName("defaults")]
+        public DefaultsSection Defaults { get; set; } = new DefaultsSection();
+    }
+
+    public class DefaultsSection
+    {
+        [JsonPropertyName("downloadVOD")]
+        public bool DownloadVOD { get; set; } = true;
+
+        [JsonPropertyName("downloadCHAT")]
+        public bool DownloadCHAT { get; set; } = true;
+
+        [JsonPropertyName("downloadLiveCHAT")]
+        public bool DownloadLiveCHAT { get; set; } = true;
+
+        [JsonPropertyName("mergeVideoChat")]
+        public bool MergeVideoChat { get; set; } = false;
+
+        [JsonPropertyName("mergeChatLayout")]
+        public string MergeChatLayout { get; set; } = "side-by-side";
+
+        [JsonPropertyName("vodTimeout")]
+        [Range(0, 86400, ErrorMessage = "VOD timeout must be between 0 and 86400 seconds.")]
+        public int VodTimeout { get; set; } = 300;
+
+        [JsonPropertyName("uploadCloud")]
+        public bool UploadCloud { get; set; } = false;
+
+        [JsonPropertyName("uploadPreMergeVideo")]
+        public bool UploadPreMergeVideo { get; set; } = true;
+
+        [JsonPropertyName("uploadMergedVideo")]
+        public bool UploadMergedVideo { get; set; } = true;
+
+        [JsonPropertyName("uploadChatVideo")]
+        public bool UploadChatVideo { get; set; } = false;
+
+        [JsonPropertyName("deleteFiles")]
+        public bool DeleteFiles { get; set; } = false;
+
+        [JsonPropertyName("onlyRaw")]
+        public bool OnlyRaw { get; set; } = false;
+
+        [JsonPropertyName("cleanRaw")]
+        public bool CleanRaw { get; set; } = true;
+
+        [JsonPropertyName("hls_segments")]
+        [Range(1, 50, ErrorMessage = "HLS segments must be between 1 and 50.")]
+        public int HlsSegments { get; set; } = 3;
+
+        [JsonPropertyName("hls_segmentsVOD")]
+        [Range(1, 200, ErrorMessage = "HLS segments (VOD) must be between 1 and 200.")]
+        public int HlsSegmentsVOD { get; set; } = 10;
+
+        [JsonPropertyName("streamlink_ttvlol")]
+        public bool StreamlinkTtvlol { get; set; } = false;
+
+        [JsonPropertyName("ffmpeg_hwaccel")]
+        public string FfmpegHwaccel { get; set; } = "auto";
+
+        [JsonPropertyName("ffmpeg_threads")]
+        [Range(0, 128, ErrorMessage = "FFmpeg threads must be between 0 and 128.")]
+        public int FfmpegThreads { get; set; } = 0;
+
+        [JsonPropertyName("ffmpeg_audio_codec")]
+        public string FfmpegAudioCodec { get; set; } = "aac";
+
+        [JsonPropertyName("ffmpeg_audio_samplerate")]
+        [Range(8000, 192000, ErrorMessage = "Audio sample rate must be between 8000 and 192000.")]
+        public int FfmpegAudioSamplerate { get; set; } = 48000;
+
+        [JsonPropertyName("ffmpeg_audio_bitrate")]
+        public string FfmpegAudioBitrate { get; set; } = "192k";
+
+        [JsonPropertyName("ffmpeg_error_recovery")]
+        public bool FfmpegErrorRecovery { get; set; } = true;
+
+        [JsonPropertyName("ffmpeg_faststart")]
+        public bool FfmpegFaststart { get; set; } = true;
+
+        [JsonPropertyName("ffmpeg_progress")]
+        public bool FfmpegProgress { get; set; } = false;
     }
 }