Redesign history tab with package-card style, collapsible details, right-align remove button

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/renderer/styles.css

@@ -1102,6 +1102,60 @@ body,
   background: linear-gradient(90deg, #22c55e, #4ade80);
 }
 
+/* History Tab */
+.history-view {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.history-toolbar {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 5px 12px;
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  font-size: 12px;
+  font-weight: 700;
+  color: var(--muted);
+}
+
+.history-card {
+  cursor: default;
+}
+
+.history-details {
+  padding: 10px 12px;
+  border-top: 1px solid color-mix(in srgb, var(--border) 40%, transparent);
+}
+
+.history-detail-grid {
+  display: grid;
+  grid-template-columns: 140px 1fr;
+  gap: 4px 16px;
+  font-size: 13px;
+}
+
+.history-label {
+  color: var(--muted);
+  font-weight: 600;
+}
+
+.history-path {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.history-actions {
+  margin-top: 10px;
+  display: flex;
+  justify-content: flex-end;
+  gap: 8px;
+}
+
 table {
   width: 100%;
   table-layout: fixed;