fix(maestro): satisfy field_reassign_with_default lint

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

crates/maestro-tui/src/structured_task.rs

@@ -671,13 +671,15 @@ mod tests {
 
     #[test]
     fn selecting_a_rendered_line_selects_its_whole_block() {
-        let mut state = StructuredState::default();
+        let mut state = StructuredState {
-        state.line_rows = vec![
+            line_rows: vec![
-            Some("one".into()),
+                Some("one".into()),
-            Some("one".into()),
+                Some("one".into()),
-            None,
+                None,
-            Some("two".into()),
+                Some("two".into()),
-        ];
+            ],
+            ..Default::default()
+        };
 
         assert!(state.select_rendered_line(1));
         assert_eq!(state.selected.as_deref(), Some("one"));

web/src/structuredRender.ts

@@ -594,14 +594,7 @@ export function buildToolGroup(
   glyph.setAttribute("aria-hidden", "true");
   const title = el("span", "st-tool-group-title");
   title.textContent = `${rows.length} tool calls`;
-  const names = el("span", "st-tool-group-names");
+  head.append(glyph, title);
-  names.textContent = rows
-    .map((row) => {
-      const tool = (row.data ?? {}) as AcpToolCallLike;
-      return splitToolTitle(tool.title, tool.name, tool.kind).label;
-    })
-    .join(" · ");
-  head.append(glyph, title, names);
 
   const body = el("div", "st-tool-group-body st-disclosure");
   const bodyClip = el("div", "st-disclosure-clip");

web/src/styles.css

@@ -2828,12 +2828,12 @@ input.leaf-rename:focus {
   border: 1px solid var(--border);
   border-radius: var(--r-2);
   background: color-mix(in oklab, var(--surface-2) 55%, transparent);
-  padding: var(--sp-2) var(--sp-3);
+  padding: var(--sp-1) var(--sp-2);
   transition: background var(--dur-fast) var(--ease-out);
 }
 
 .st-tool-group:hover {
-  background: var(--surface-2);
+  background: color-mix(in oklab, var(--surface-2) 70%, transparent);
 }
 
 .st-tool-group-head {
@@ -2870,15 +2870,6 @@ input.leaf-rename:focus {
   font-weight: 500;
 }
 
-.st-tool-group-names {
-  min-width: 0;
-  overflow: hidden;
-  color: var(--muted);
-  text-align: left;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
 .st-tool-group-body {
   padding-top: 0;
 }
@@ -2886,11 +2877,22 @@ input.leaf-rename:focus {
 .st-tool-group-body .st-disclosure-inner {
   display: flex;
   flex-direction: column;
-  padding-top: var(--sp-2);
+  padding-top: var(--sp-1);
 }
 
 .st-tool-group-body .st-disclosure-inner > .st-row-tool {
-  padding: var(--sp-1) 0;
+  padding: 0;
+}
+
+/* inside a group, tool cards lose their border and background —
+   the group container already provides the visual boundary. */
+.st-tool-group-body .st-tool {
+  border: 0;
+}
+
+.st-tool-group-body .st-tool-head {
+  padding: var(--sp-1) var(--sp-2);
+  border-radius: var(--r-1);
 }
 
 .st-tool-group-body[hidden] {