init: media-center v2

Rewrite of ESH-Media v1 with separated main/renderer/shared architecture
(vite-plugin-electron, React 18, react-router-dom). Includes NeDB storage,
electron-store config, proxy manager with FoxyProxy/uBlock extensions,
custom server-checked updater, NSIS installer.

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

src/renderer/styles/BookmarkCard.css

@@ -0,0 +1,81 @@
+.bookmark-card {
+  position: relative;
+  background-color: var(--bg-secondary);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  overflow: hidden;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.bookmark-card:hover {
+  transform: translateY(-4px);
+  box-shadow: 0 4px 12px var(--shadow);
+}
+
+.bookmark-image {
+  width: 100%;
+  height: 300px;
+  object-fit: cover;
+  background-color: var(--bg-tertiary);
+}
+
+.bookmark-info {
+  padding: 1rem;
+}
+
+.bookmark-title {
+  font-size: 1.1rem;
+  font-weight: 500;
+  margin: 0 0 0.5rem 0;
+  line-height: 1.3;
+}
+
+.bookmark-site {
+  color: var(--accent);
+  font-size: 0.85rem;
+  margin: 0 0 0.25rem 0;
+}
+
+.bookmark-year {
+  color: var(--text-secondary);
+  font-size: 0.85rem;
+  margin: 0 0 0.5rem 0;
+}
+
+.bookmark-description {
+  color: var(--text-secondary);
+  font-size: 0.85rem;
+  line-height: 1.4;
+  margin: 0;
+  overflow: hidden;
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+.delete-button {
+  position: absolute;
+  top: 0.5rem;
+  right: 0.5rem;
+  background-color: rgba(244, 67, 54, 0.9);
+  color: white;
+  width: 32px;
+  height: 32px;
+  padding: 0;
+  border-radius: 50%;
+  font-size: 1.2rem;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  opacity: 0;
+  transition: opacity 0.2s;
+}
+
+.bookmark-card:hover .delete-button {
+  opacity: 1;
+}
+
+.delete-button:hover {
+  background-color: rgba(244, 67, 54, 1);
+}