setting, session and profile fix

frontend/src/utils/fileMeta.js

@@ -0,0 +1,43 @@
+const TYPE_LABELS = {
+  "application/pdf": "PDF",
+  "application/msword": "Word",
+  "application/vnd.openxmlformats-officedocument.wordprocessingml.document": "Word",
+  "application/vnd.ms-excel": "Excel",
+  "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet": "Excel",
+  "application/vnd.ms-powerpoint": "PowerPoint",
+  "application/vnd.openxmlformats-officedocument.presentationml.presentation": "PowerPoint",
+  "application/zip": "ZIP",
+  "application/json": "JSON",
+  "text/plain": "Text",
+  "text/csv": "CSV",
+  "image/jpeg": "JPEG",
+  "image/jpg": "JPEG",
+  "image/png": "PNG",
+  "image/gif": "GIF",
+  "image/webp": "WebP",
+  "image/svg+xml": "SVG",
+};
+
+export function formatFileSize(bytes) {
+  const size = Number(bytes);
+  if (!Number.isFinite(size) || size <= 0) return "";
+  if (size < 1024) return `${size} B`;
+  if (size < 1024 * 1024) return `${Math.round(size / 1024)} KB`;
+  if (size < 1024 * 1024 * 1024) return `${(size / (1024 * 1024)).toFixed(1)} MB`;
+  return `${(size / (1024 * 1024 * 1024)).toFixed(1)} GB`;
+}
+
+export function fileTypeLabel(type, filename = "") {
+  const mime = String(type || "").toLowerCase();
+  if (TYPE_LABELS[mime]) return TYPE_LABELS[mime];
+  if (mime.startsWith("image/")) return mime.slice(6).toUpperCase();
+  if (mime.startsWith("video/")) return "Video";
+  if (mime.startsWith("audio/")) return "Audio";
+  const ext = String(filename).split(".").pop();
+  if (ext && ext !== filename && ext.length <= 5) return ext.toUpperCase();
+  return "File";
+}
+
+export function fileMetaLine(type, size, filename = "") {
+  return [fileTypeLabel(type, filename), formatFileSize(size)].filter(Boolean).join(" · ");
+}