fix: show missing tutorial file download, support more video formats

- Render the download button for a tutorial's uploaded file field
  (it was fetched from the API but never displayed).
- Recognize mov/avi/wmv as video (the backend already accepts them as
  uploads) and add a download fallback for any media type the browser
  can't play inline instead of a dead "unknown file type" message.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KMLvfLviDB12t4U9UijE4k

src/pages/tutorial/section/components/Leran.tsx

@@ -13,7 +13,7 @@ const getMediaType = (url: string) => {
     if (["jpg", "jpeg", "png", "gif"].includes(extension)) {
       return "image";
     }
-    if (["mp4", "webm", "ogg"].includes(extension)) {
+    if (["mp4", "webm", "ogg", "mov", "avi", "wmv"].includes(extension)) {
       return "video";
     }
   }
@@ -117,6 +117,7 @@ const Learn = ({ activeTutorial }: LearnProps) => {
               id: string;
               title: string;
               medias: string[];
+              file: string | null;
               url_file: string;
             }) => (
               <div
@@ -141,18 +142,36 @@ const Learn = ({ activeTutorial }: LearnProps) => {
                             className="w-full h-full object-cover rounded-lg"
                           />
                         ) : mediaType === "video" ? (
+                          <div className="w-full h-full flex flex-col gap-2">
                             <video
                               src={media}
                               controls
                               className="w-full h-full object-cover rounded-lg"
                             />
+                            <Button
+                              extra="!py-1 self-center"
+                              onClick={() => saveAs(media)}
+                            >
+                              دانلود ویدیو
+                            </Button>
+                          </div>
                         ) : (
-                          <p>نوع فایل ناشناخته است</p>
+                          <div className="w-full h-full flex flex-col gap-2 justify-center items-center">
+                            <p>نوع فایل قابل نمایش نیست</p>
+                            <Button extra="!py-1" onClick={() => saveAs(media)}>
+                              دانلود فایل
+                            </Button>
+                          </div>
                         )}
                       </div>
                     );
                   })}
                 </div>
+                {i.file && (
+                  <Button extra="!mb-4" onClick={() => saveAs(i.file as string)}>
+                    دانلود فایل آموزش
+                  </Button>
+                )}
                 {i.url_file && (
                   <>
                     <Button extra="!mb-4" onClick={() => saveAs(i.url_file)}>