refine InlineError, ServerCard, HistoryEntry, and LoggingScreen

- InlineError: show more/less toggle on same line as message, collapsible
  details, doc link as button
- ServerCard: use ContentViewer with CopyButton for command, remove
  onCopyCommand prop, combine action rows, add responsive Card variant
- HistoryEntry: use ContentViewer with CopyButton for JSON blocks, swap
  duration and status badge positions
- LoggingScreen: stretch log stream panel to full height, center empty
  message vertically

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/App.css

@@ -103,3 +103,15 @@
 .inspector-spin {
   animation: inspector-spin 1s linear infinite;
 }
+
+/* ── Responsive card ────────────────────────────────────── */
+
+.card-responsive {
+  width: 100%;
+}
+
+@media (min-width: 62em) {
+  .card-responsive {
+    width: 50%;
+  }
+}