gui_client: keep collapsed nodes collapsed on record updates

collect: capture apply_procedural return value

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

client/gui_client.py

@@ -328,7 +328,7 @@ class DashboardTab(QWidget):
         changed = {p for p, v in curr_flat.items() if v != self._prev_flat.get(p)}
         self._prev_flat = curr_flat
 
-        expanded = self._expanded_paths()
+        collapsed = self._collapsed_paths()
         self._tree.clear()
 
         bold = QFont()
@@ -365,7 +365,7 @@ class DashboardTab(QWidget):
             self._tree.addTopLevelItem(d_item)
 
         self._tree.expandAll()
-        self._restore_expanded(expanded)
+        self._apply_collapsed(collapsed)
 
     def _add_fields(self, parent: QTreeWidgetItem, data: dict, path: str, changed: set):
         for k, v in data.items():
@@ -389,33 +389,31 @@ class DashboardTab(QWidget):
                         item.setBackground(col, _CHANGED_BG)
                 parent.addChild(item)
 
-    # ── preserve expand state across refreshes ──────────────────────────────
+    # ── preserve collapse state across refreshes ─────────────────────────────
 
-    def _expanded_paths(self) -> set[str]:
+    def _collapsed_paths(self) -> set[str]:
         paths = set()
-        root = self._tree.invisibleRootItem()
-        self._collect_expanded(root, "", paths)
+        self._collect_collapsed(self._tree.invisibleRootItem(), "", paths)
         return paths
 
-    def _collect_expanded(self, item, prefix, paths):
+    def _collect_collapsed(self, item, prefix, paths):
         for i in range(item.childCount()):
             child = item.child(i)
             path = f"{prefix}/{child.text(0)}"
-            if child.isExpanded():
+            if child.childCount() > 0 and not child.isExpanded():
                 paths.add(path)
-            self._collect_expanded(child, path, paths)
+            self._collect_collapsed(child, path, paths)
 
-    def _restore_expanded(self, paths: set[str]):
-        root = self._tree.invisibleRootItem()
-        self._apply_expanded(root, "", paths)
+    def _apply_collapsed(self, paths: set[str]):
+        self._set_collapsed(self._tree.invisibleRootItem(), "", paths)
 
-    def _apply_expanded(self, item, prefix, paths):
+    def _set_collapsed(self, item, prefix, paths):
         for i in range(item.childCount()):
             child = item.child(i)
             path = f"{prefix}/{child.text(0)}"
             if path in paths:
-                child.setExpanded(True)
-            self._apply_expanded(child, path, paths)
+                child.setExpanded(False)
+            self._set_collapsed(child, path, paths)
 
 
 # ── Plot tab ──────────────────────────────────────────────────────────────────

server/collect.py

@@ -86,7 +86,7 @@ def run(args: argparse.Namespace) -> None:
                 try:
                     we_connect.update(wc)
                     snapshot = extract_all(vehicle)
-                    apply_procedural(snapshot)
+                    snapshot = apply_procedural(snapshot)
                     store["records"].append(snapshot)
                     save_store(out, store, args.max_records)
                     if args.diff: