0.10.2: audio waveforms + sidebar section polish

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/i18n/messages.ts

@@ -63,8 +63,10 @@ export const en = {
   sidebar: {
     addFile: 'Add image or audio',
     library: 'Library',
+    images: 'Images',
     thumbnailsHide: 'Hide thumbnails',
     thumbnailsShow: 'Show thumbnails',
+    thumbsToggle: 'Thumbs',
     imageLabel: 'Image',
     addLayerTooltip: 'Insert as layer (or drag to stage)',
     noImages: 'No images imported',