Fix long loading

recounting_dashboard.py

@@ -112,25 +112,30 @@ def api_recount_progress():
 def api_mp4_files():
     folders = {}
     output = Path(OUTPUT_DIR)
-    if output.exists():
-        for f in sorted(output.rglob("*.mp4"), key=lambda p: p.stat().st_mtime, reverse=True):
+    if not output.exists():
+        return jsonify([])
+
+    for d in sorted(output.iterdir(), reverse=True):
+        if not d.is_dir():
+            continue
+        folder_name = d.name
+        mp4s = sorted(d.glob("*.mp4"), key=lambda p: p.stat().st_mtime, reverse=True)
+        if not mp4s:
+            continue
+        files = []
+        for f in mp4s:
             st = f.stat()
-            rel = f.relative_to(output)
-            folder = str(rel.parent) if str(rel.parent) != "." else ""
-            if folder not in folders:
-                folders[folder] = []
-            folders[folder].append({
+            files.append({
                 "name": f.name,
                 "path": str(f),
                 "size": st.st_size,
                 "mtime": datetime.fromtimestamp(st.st_mtime).isoformat(),
             })
+        folders[folder_name] = files
+
     result = []
-    for folder, files in sorted(folders.items(), key=lambda x: x[0], reverse=True):
-        result.append({
-            "folder": folder,
-            "files": files,
-        })
+    for folder, files in sorted(folders.items(), reverse=True):
+        result.append({"folder": folder, "files": files})
     return jsonify(result)