Switch the UI icons from mynaui to TDesign

Swap @ng-icons/mynaui for @ng-icons/tdesign-icons (34.0.0, the release
matching @ng-icons/core), drawn at TDesign's native stroke. Each former
mynaui name maps to one TDesign name everywhere it was used; the unused
ArrowLeftRight is dropped. The options button's ellipsis goes from 1.5rem
to 0.8rem: TDesign's dots span 18 of 24 units against mynaui's 8, so this
keeps today's footprint.

Co-Authored-By: Claude <noreply@anthropic.com>

ui/src/app/core/file-icons.ts

@@ -13,27 +13,27 @@ const LINK = 'shrink-0 text-icon-link';
 
 const CATEGORIES: Record<Category, { glyph: string; class: string; extensions: string[] }> = {
   image: {
-    glyph: 'mynaImage',
+    glyph: 'tdesignImage',
     class: 'shrink-0 text-icon-image',
     extensions: 'png jpg jpeg gif webp avif svg ico icns bmp tiff tif heic heif raw'.split(' '),
   },
   audio: {
-    glyph: 'mynaMusic',
+    glyph: 'tdesignMusic',
     class: 'shrink-0 text-icon-media',
     extensions: 'mp3 wav flac aac ogg oga m4a opus wma aiff aif mid midi'.split(' '),
   },
   video: {
-    glyph: 'mynaVideo',
+    glyph: 'tdesignVideo',
     class: 'shrink-0 text-icon-media',
     extensions: 'mp4 mkv mov avi webm m4v mpg mpeg wmv flv 3gp'.split(' '),
   },
   archive: {
-    glyph: 'mynaArchive',
+    glyph: 'tdesignFileZip',
     class: 'shrink-0 text-icon-archive',
     extensions: 'zip tar gz tgz bz2 xz zst 7z rar dmg iso jar deb rpm pkg apk'.split(' '),
   },
   code: {
-    glyph: 'mynaCode',
+    glyph: 'tdesignCode',
     class: 'shrink-0 text-icon-code',
     // ".ts" is TypeScript here, not an MPEG transport stream (deliberate)
     extensions: (
@@ -45,7 +45,7 @@ const CATEGORIES: Record<Category, { glyph: string; class: string; extensions: s
     ).split(' '),
   },
   doc: {
-    glyph: 'mynaFileText',
+    glyph: 'tdesignFile1',
     class: MUTED, // docs keep the neutral color; only the glyph changes
     extensions: 'md markdown txt rtf pdf doc docx xls xlsx ppt pptx csv tsv log odt ods odp epub'.split(' '),
   },
@@ -85,11 +85,11 @@ export function fileKindKey(entry: FileEntry): string {
 }
 
 export function fileGlyph(entry: FileEntry): string {
-  if (entry.name === '..') return 'mynaArrowUp';
-  if (entry.type === 'dir') return 'mynaFolder';
-  if (entry.type === 'symlink') return 'mynaLink';
+  if (entry.name === '..') return 'tdesignArrowUp';
+  if (entry.type === 'dir') return 'tdesignFolder';
+  if (entry.type === 'symlink') return 'tdesignLink';
   const category = categoryOf(entry.name);
-  return category ? CATEGORIES[category].glyph : 'mynaFile';
+  return category ? CATEGORIES[category].glyph : 'tdesignFile';
 }
 
 export function fileIconClass(entry: FileEntry): string {