fix(sidebar): expand collapsed groups when locating tab

Closes #7387

apps/desktop/src/components/sidebar/__tests__/ConnectionTree.locateCollapsedGroup.spec.ts

@@ -0,0 +1,20 @@
+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+
+const connectionTreeSource = readFileSync(new URL("../ConnectionTree.vue", import.meta.url), "utf8");
+
+describe("ConnectionTree locate in collapsed groups", () => {
+  it("reopens collapsed connection groups on the node path through the persisted layout op", () => {
+    // Group expansion must flow through store.expandConnectionGroups so
+    // layout.collapsed is flipped and the next layout rebuild keeps the group
+    // open; flipping isExpanded directly would be reverted by that rebuild.
+    expect(connectionTreeSource).toMatch(/const collapsedGroupIds = nodePath\s*\.filter\(\(node\) => node\.type === "connection-group" && !node\.isExpanded\)\s*\.map\(\(node\) => node\.id\);/);
+    // The expansion happens before the flat-tree match that drives selection,
+    // scrolling and flashing, so the reopened groups are visible to it.
+    expect(connectionTreeSource).toMatch(/store\.expandConnectionGroups\(collapsedGroupIds\);\s*\}\s*\n\s*await nextTick\(\);\s*\n\s*const match = target \? findSidebarNodeForTarget\(target, flatNodes\.value\) : null;/);
+  });
+
+  it("still gates generic ancestor expansion on loaded children only (#5850)", () => {
+    expect(connectionTreeSource).toMatch(/if \(!ancestor\.isExpanded && store\.canUseLoadedTreeNodeToggle\(ancestor\)\) \{\s*ancestor\.isExpanded = true;\s*\}/);
+  });
+});