fix: bw/stats 404, gateway links, history crash

- swr.ts: remove useBandwidth(), drop bw from useDashboard()
- events/route.ts: skip bandwidth SSE (Kubo 0.28.0 unsupported)
- usage/page.tsx: remove getBWStats call + bw references
- helpers.ts: gatewayLink -> ipfs.maos.dedyn.io (subdomain only)
- upload/page.tsx: fix local gatewayLink (subdomain only)
- storage.ts: update default gatewayUrl, add defensive getHistory()

src/app/explorer/components/FileIcon.tsx

@@ -1,11 +1,15 @@
 'use client';
 
 import {
-  FileText,
-  Code,
-  Code2,
-  Image,
   File,
+  FileArchive,
+  FileAudio,
+  FileCode,
+  FileImage,
+  FileJson,
+  FileSpreadsheet,
+  FileText,
+  FileVideo,
   Folder,
 } from 'lucide-react';
 
@@ -15,34 +19,38 @@ interface FileIconProps {
   className?: string;
 }
 
+const ext = (name: string): string =>
+  name.split('.').pop()?.toLowerCase() ?? '';
+
+const IMAGE_EXTS = new Set([
+  'jpg', 'jpeg', 'png', 'gif', 'webp', 'svg', 'bmp', 'ico',
+]);
+const VIDEO_EXTS = new Set(['mp4', 'webm', 'mov', 'avi', 'mkv']);
+const AUDIO_EXTS = new Set(['mp3', 'wav', 'ogg', 'flac', 'm4a']);
+const CODE_EXTS = new Set([
+  'js', 'ts', 'jsx', 'tsx', 'py', 'go', 'rs', 'css', 'html',
+  'xml', 'yaml', 'yml', 'sh', 'bash',
+]);
+const ARCHIVE_EXTS = new Set(['zip', 'tar', 'gz', 'rar', '7z']);
+const SHEET_EXTS = new Set(['csv', 'xls', 'xlsx']);
+const TEXT_EXTS = new Set(['txt', 'md', 'log']);
+
 export default function FileIcon({ name, type, className = 'w-4 h-4' }: FileIconProps) {
   if (type === 'dir') {
     return <Folder className={`${className} text-accent-cyan`} />;
   }
 
-  const ext = name.split('.').pop()?.toLowerCase() ?? '';
+  const e = ext(name);
 
-  switch (ext) {
-    case 'md':
-      return <FileText className={`${className} text-surface-400`} />;
-    case 'json':
-      return <Code className={`${className} text-surface-400`} />;
-    case 'js':
-    case 'ts':
-    case 'py':
-    case 'css':
-    case 'html':
-      return <Code2 className={`${className} text-surface-400`} />;
-    case 'jpg':
-    case 'jpeg':
-    case 'png':
-    case 'gif':
-    case 'webp':
-    case 'svg':
-      return <Image className={`${className} text-surface-400`} />;
-    case 'pdf':
-      return <File className={`${className} text-surface-400`} />;
-    default:
-      return <File className={`${className} text-surface-400`} />;
-  }
+  if (IMAGE_EXTS.has(e))   return <FileImage     className={`${className} text-surface-400`} />;
+  if (VIDEO_EXTS.has(e))   return <FileVideo     className={`${className} text-surface-400`} />;
+  if (AUDIO_EXTS.has(e))   return <FileAudio     className={`${className} text-surface-400`} />;
+  if (e === 'pdf')         return <FileText      className={`${className} text-accent-rose`} />; // FilePdf niet beschikbaar in deze versie
+  if (e === 'json')        return <FileJson      className={`${className} text-surface-400`} />;
+  if (CODE_EXTS.has(e))    return <FileCode      className={`${className} text-surface-400`} />;
+  if (ARCHIVE_EXTS.has(e)) return <FileArchive   className={`${className} text-surface-400`} />;
+  if (SHEET_EXTS.has(e))   return <FileSpreadsheet className={`${className} text-surface-400`} />;
+  if (TEXT_EXTS.has(e))    return <FileText      className={`${className} text-surface-400`} />;
+
+  return <File className={`${className} text-surface-400`} />;
 }