feat(web): collapse resolved approval rows

Resolved permission boxes vanish from the transcript instead of
lingering as "answered" cards. When a turn has 2+ tools the resolved
approval is absorbed into the tool group as a compact italic line;
otherwise it is hidden entirely.

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

web/src/styles.css

@@ -3040,6 +3040,16 @@ input.leaf-rename:focus {
   color: var(--faint);
 }
 
+/* compact resolved approval inside a tool group — same muted treatment
+   as intermediate agent text so the audit trail is preserved without
+   drawing attention to itself. */
+.st-approval-compact {
+  color: var(--muted);
+  font-size: var(--fs-12);
+  padding: var(--sp-1) var(--sp-2);
+  font-style: italic;
+}
+
 .act {
   appearance: none;
   font: inherit;