style: improve bookmarks sidebar visual design

- Replace green buttons with purple/blue primary color
- Add subtle borders to card and large preview views
- Enable image previews in card view for all bookmarks (not just articles)
- Fetch OG images for regular bookmarks in card view
- Improve hover states with lighter border colors

src/components/BookmarkViews/CardView.tsx

@@ -8,6 +8,7 @@ import IconButton from '../IconButton'
 import { classifyUrl } from '../../utils/helpers'
 import { IconGetter } from './shared'
 import { useImageCache } from '../../hooks/useImageCache'
+import { getPreviewImage, fetchOgImage } from '../../utils/imagePreview'
 import { UserSettings } from '../../services/settingsService'
 import { getProfileUrl, getEventUrl } from '../../config/nostrGateways'
 
@@ -44,17 +45,33 @@ export const CardView: React.FC<CardViewProps> = ({
   articleSummary,
   settings
 }) => {
-  const cachedImage = useImageCache(articleImage, settings)
+  const firstUrl = hasUrls ? extractedUrls[0] : null
+  const firstUrlClassificationType = firstUrl ? classifyUrl(firstUrl)?.type : null
+  const instantPreview = firstUrl ? getPreviewImage(firstUrl, firstUrlClassificationType || '') : null
+  
+  const [ogImage, setOgImage] = useState<string | null>(null)
   const [expanded, setExpanded] = useState(false)
   const [urlsExpanded, setUrlsExpanded] = useState(false)
+  
   const contentLength = (bookmark.content || '').length
   const shouldTruncate = !expanded && contentLength > 210
   const isArticle = bookmark.kind === 30023
   const isWebBookmark = bookmark.kind === 39701
+  
+  // Determine which image to use (article image, instant preview, or OG image)
+  const previewImage = articleImage || instantPreview || ogImage
+  const cachedImage = useImageCache(previewImage || undefined, settings)
+  
+  // Fetch OG image if we don't have any other image
+  React.useEffect(() => {
+    if (firstUrl && !articleImage && !instantPreview && !ogImage) {
+      fetchOgImage(firstUrl).then(setOgImage)
+    }
+  }, [firstUrl, articleImage, instantPreview, ogImage])
 
   return (
     <div key={`${bookmark.id}-${index}`} className={`individual-bookmark ${bookmark.isPrivate ? 'private-bookmark' : ''}`}>
-      {isArticle && cachedImage && (
+      {cachedImage && (
         <div 
           className="article-hero-image"
           style={{ backgroundImage: `url(${cachedImage})` }}

src/styles/components/cards.css

@@ -19,8 +19,8 @@
   .bookmarks-grid.bookmarks-large { gap: 1rem; }
 }
 
-.individual-bookmark { background: transparent; padding: 1rem; border-radius: 8px; transition: all 0.2s ease; border: 1px solid transparent; word-wrap: break-word; overflow-wrap: break-word; word-break: break-word; overflow: hidden; }
-.individual-bookmark:hover { border-color: transparent; background: #2a2a2a; }
+.individual-bookmark { background: transparent; padding: 1rem; border-radius: 8px; transition: all 0.2s ease; border: 1px solid #2a2a2a; word-wrap: break-word; overflow-wrap: break-word; word-break: break-word; overflow: hidden; }
+.individual-bookmark:hover { border-color: #3a3a3a; background: #252525; }
 
 /* Compact view */
 .individual-bookmark.compact { padding: 0.5rem 0.5rem; background: transparent; border: none; border-bottom: 1px solid #2a2a2a; border-radius: 0; box-shadow: none; width: 100%; max-width: 100%; overflow: hidden; }
@@ -48,13 +48,13 @@
 .bookmark-meta-minimal { font-size: 0.8rem; color: #888; }
 .author-link-minimal { color: #888; text-decoration: none; transition: color 0.2s ease; }
 .author-link-minimal:hover { color: #aaa; }
-.read-now-button-minimal { background: #28a745; color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.85rem; transition: all 0.2s ease; white-space: nowrap; }
-.read-now-button-minimal:hover { background: #218838; }
+.read-now-button-minimal { background: #646cff; color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.85rem; transition: all 0.2s ease; white-space: nowrap; }
+.read-now-button-minimal:hover { background: #535bf2; }
 .expand-toggle-urls { margin-top: 0.5rem; background: transparent; border: none; color: #646cff; cursor: pointer; font-size: 0.8rem; padding: 0.25rem 0; text-decoration: underline; }
 .expand-toggle-urls:hover { color: #8088ff; }
 
 /* Large preview view */
-.individual-bookmark.large { padding: 0; display: flex; flex-direction: column; overflow: hidden; }
+.individual-bookmark.large { padding: 0; display: flex; flex-direction: column; overflow: hidden; border: 1px solid #2a2a2a; }
 .large-preview-image { width: 100%; height: 180px; background: #1a1a1a; background-size: cover; background-position: center; background-repeat: no-repeat; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: all 0.2s ease; border-bottom: 1px solid #333; position: relative; }
 .large-preview-image:hover { opacity: 0.9; }
 .large-preview-image::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.3) 100%); pointer-events: none; }
@@ -63,8 +63,8 @@
 .large-text { color: #ccc; font-size: 0.95rem; line-height: 1.6; margin-bottom: 1rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
 .large-footer { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; font-size: 0.8rem; color: #888; padding-top: 0.75rem; border-top: 1px solid #333; }
 .large-author { flex: 1; }
-.large-read-button { background: #28a745; color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.85rem; transition: all 0.2s ease; display: flex; align-items: center; gap: 0.5rem; }
-.large-read-button:hover { background: #218838; }
+.large-read-button { background: #646cff; color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.85rem; transition: all 0.2s ease; display: flex; align-items: center; gap: 0.5rem; }
+.large-read-button:hover { background: #535bf2; }
 
 /* Blog cards (Explore) */
 .explore-container { padding: 2rem; max-width: 1400px; margin: 0 auto; min-height: 100vh; }

src/styles/components/icon-button.css

@@ -20,8 +20,8 @@
 .icon-button.primary { background: #646cff; color: white; border-color: #646cff; }
 .icon-button.primary:hover { filter: brightness(1.05); }
 
-.icon-button.success { background: #28a745; color: white; border-color: #28a745; }
-.icon-button.success:hover { filter: brightness(1.05); }
+.icon-button.success { background: #646cff; color: white; border-color: #646cff; }
+.icon-button.success:hover { filter: brightness(1.1); }
 
 .icon-button.ghost { background: #2a2a2a; }