From ba08a2fd347b670cfb5231173e57f9d88f9a47d3 Mon Sep 17 00:00:00 2001
From: bboysoul <bboysoulcn@gmail.com>
Date: Tue, 8 Sep 2026 17:43:56 +0800
Subject: [PATCH] fix: collapse subtasks when opening lists

---
 frontend/src/App.vue       | 13 +++++++++++--
 frontend/src/style.test.ts |  7 +++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 49d0e16..3da134a 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -324,7 +324,10 @@ function restoreNavigation(inboxId: string) {
 
 async function loadRestoredView() {
   if (activeView.value === 'trash') await loadTrash()
-  else if (isTaskView(activeView.value)) await loadAll()
+  else if (isTaskView(activeView.value)) {
+    await loadAll()
+    if (activeView.value === 'tasks') collapseLoadedTaskChildren()
+  }
   else { tasks.value = []; totalTasks.value = 0 }
 }
 
@@ -479,7 +482,10 @@ async function switchView(view: View, listId?: string) {
   if (view === 'trash') await loadTrash()
   else if (view === 'today') await loadTodayView()
   else if (!isTaskView(view)) tasks.value = []
-  else await loadAll()
+  else {
+    await loadAll()
+    if (view === 'tasks') collapseLoadedTaskChildren()
+  }
 }
 async function loadTodayView() {
   await loadAll()
@@ -646,6 +652,9 @@ function cancelTaskSwipe(task?: Task) {
   taskSwipeStart.value = null
   if (task) taskSwipeOffsets.value[task.id] = 0
 }
+function collapseLoadedTaskChildren() {
+  collapsedTaskIds.value = new Set(tasks.value.filter((task) => task.subtasks?.length).map((task) => task.id))
+}
 function toggleTaskChildren(task: Task) {
   if (!task.subtasks?.length) return
   const next = new Set(collapsedTaskIds.value)
diff --git a/frontend/src/style.test.ts b/frontend/src/style.test.ts
index 7dcd733..59b36d7 100644
--- a/frontend/src/style.test.ts
+++ b/frontend/src/style.test.ts
@@ -90,6 +90,13 @@ describe('task and habit row decoration', () => {
     expect(app).toContain(':aria-expanded="!collapsedTaskIds.has(node.task.id)"')
   })
 
+  it('starts parent tasks collapsed when entering a task list', () => {
+    expect(app).toContain('function collapseLoadedTaskChildren()')
+    expect(app).toContain("else if (isTaskView(activeView.value)) {\n    await loadAll()\n    if (activeView.value === 'tasks') collapseLoadedTaskChildren()")
+    expect(app).toContain("else {\n    await loadAll()\n    if (view === 'tasks') collapseLoadedTaskChildren()")
+    expect(app).toContain('tasks.value.filter((task) => task.subtasks?.length).map((task) => task.id)')
+  })
+
   it('shows visible completion buttons for tasks and subtasks while keeping swipe shortcuts', () => {
     expect(app).not.toContain('class="sr-only" :aria-label="node.task.completed')
     expect(app).not.toContain('class="sr-only" :aria-label="subtask.completed')