feat(media-upload): 增加全量音视频格式支持，确保与后端一致

common/js/media-upload.js

@@ -40,10 +40,16 @@ const EXT_MIME_MAP = {
   m4a: 'audio/mp4', flac: 'audio/flac', ogg: 'audio/ogg',
   oga: 'audio/ogg', opus: 'audio/opus', amr: 'audio/amr', wma: 'audio/x-ms-wma',
   aiff: 'audio/aiff', aif: 'audio/aiff', ape: 'audio/x-ape', mid: 'audio/midi',
+  // PR-AV-FULL-SUPPORT (2026-09-24): 全量音视频格式 (与后端 MediaUploadPolicy::guessMimeByExt 对齐)
+  midi: 'audio/midi', caf: 'audio/x-caf', mka: 'audio/x-matroska', ac3: 'audio/ac3',
   mp4: 'video/mp4', mov: 'video/quicktime', avi: 'video/x-msvideo',
   mkv: 'video/x-matroska', webm: 'video/webm', flv: 'video/x-flv',
   m4v: 'video/x-m4v', wmv: 'video/x-ms-wmv', '3gp': 'video/3gpp',
   mpeg: 'video/mpeg', mpg: 'video/mpeg', ts: 'video/mp2t',
+  '3g2': 'video/3gpp2', f4v: 'video/x-flv', mpe: 'video/mpeg', m2v: 'video/mpeg',
+  m2ts: 'video/mp2t', mts: 'video/mp2t', ogv: 'video/ogg', vob: 'video/mpeg',
+  asf: 'video/x-ms-asf', rm: 'application/vnd.rn-realmedia',
+  rmvb: 'application/vnd.rn-realmedia-vbr', divx: 'video/x-divx',
   doc: 'application/msword',
   docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
   ppt: 'application/vnd.ms-powerpoint',