From a69846de93874885af08846b8c7b9a341158d036 Mon Sep 17 00:00:00 2001
From: QAyong <QAyong@outlook.com>
Date: Tue, 29 Sep 2026 02:42:45 +0800
Subject: [PATCH 1/2] =?UTF-8?q?feat(buddy):=20=E4=BC=9A=E8=AF=9D=E5=88=97?=
 =?UTF-8?q?=E8=A1=A8=E9=BB=98=E8=AE=A4=E6=98=BE=E7=A4=BA=205=20=E6=9D=A1?=
 =?UTF-8?q?=E5=B9=B6=E6=94=AF=E6=8C=81=E5=B1=95=E5=BC=80=E5=85=B6=E4=BD=99?=
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侧栏会话较多时列表会把「置顶 / 空间 / 任务」挤变形，需要在默认状态下收敛长度。

- 每个分组（任务分组、每个空间）默认只渲染 5 条会话；超出时在列表末尾追加一条「展开其余 N 个」行，点击后该分组全部展开
- 不提供收起按钮，改由三个时机自动收回：展开另一个分组（手风琴，同时只允许一个分组展开）、折叠该分组本身、离开任务页或重启应用
- 展开状态只存在内存中，不写入配置（不持久化）
- 投影层新增 expand 行类型与 conversationLimit / expandedConversationGroups 入参；globalTasks（原始任务数组）改为 taskRows（含合成展开行的行数组）
- 新增 DesktopTaskSidebarExpandRow 组件，与任务行同高同内边距，空间内的会话缩进对齐
- 新增 i18n：desktop.tasks.expandRemaining（中/英）
- 投影测试新增 4 例：任务分组截断与计数、展开后全显示、空间独立截断、不足 5 条时不出现展开行
---
 apps/buddy/src/i18n/locales/en-US/tasks.ts    |   1 +
 apps/buddy/src/i18n/locales/zh-CN/tasks.ts    |   1 +
 .../widgets/task-index/DesktopTaskIndex.vue   |  48 +++++--
 .../DesktopTaskSidebarExpandRow.vue           |  68 +++++++++
 .../__tests__/taskPinnedItems.spec.ts         | 135 ++++++++++++++++++
 .../widgets/task-index/taskPinnedItems.ts     |  75 +++++++++-
 .../task-index/useTaskIndexController.ts      |  29 +++-
 7 files changed, 333 insertions(+), 24 deletions(-)
 create mode 100644 apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskSidebarExpandRow.vue
 create mode 100644 apps/buddy/src/modules/tasks/widgets/task-index/__tests__/taskPinnedItems.spec.ts

diff --git a/apps/buddy/src/i18n/locales/en-US/tasks.ts b/apps/buddy/src/i18n/locales/en-US/tasks.ts
index 63367393..f06bcc4a 100644
--- a/apps/buddy/src/i18n/locales/en-US/tasks.ts
+++ b/apps/buddy/src/i18n/locales/en-US/tasks.ts
@@ -34,6 +34,7 @@ export default {
   'desktop.tasks.deleteTask': 'Delete',
   'desktop.tasks.deleteTaskConfirmMessage': '“{title}” will be removed from the task list.',
   'desktop.tasks.deleteTaskConfirmTitle': 'Delete task?',
+  'desktop.tasks.expandRemaining': 'Show {count} more',
   'desktop.imagePreview.close': 'Close image preview',
   'desktop.imagePreview.download': 'Download image',
   'desktop.imagePreview.next': 'Next image',
diff --git a/apps/buddy/src/i18n/locales/zh-CN/tasks.ts b/apps/buddy/src/i18n/locales/zh-CN/tasks.ts
index 64762b64..f8fbd2b8 100644
--- a/apps/buddy/src/i18n/locales/zh-CN/tasks.ts
+++ b/apps/buddy/src/i18n/locales/zh-CN/tasks.ts
@@ -32,6 +32,7 @@ export default {
   'desktop.tasks.deleteTask': '删除',
   'desktop.tasks.deleteTaskConfirmMessage': '“{title}”将从任务列表中移除。',
   'desktop.tasks.deleteTaskConfirmTitle': '删除任务？',
+  'desktop.tasks.expandRemaining': '展开其余 {count} 个',
   'desktop.imagePreview.close': '关闭大图',
   'desktop.imagePreview.download': '下载图片',
   'desktop.imagePreview.next': '下一张图片',
diff --git a/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskIndex.vue b/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskIndex.vue
index 302e6f3e..fd3ca5ac 100644
--- a/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskIndex.vue
+++ b/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskIndex.vue
@@ -14,6 +14,7 @@ import { useBuddyI18n } from '@/i18n/buddyI18n'
 import DesktopSpaceDialog from '@/modules/tasks/widgets/task-index/DesktopSpaceDialog.vue'
 import DesktopTaskRow from '@/modules/tasks/widgets/task-index/DesktopTaskRow.vue'
 import DesktopTaskSearchDialog from '@/modules/tasks/widgets/task-index/DesktopTaskSearchDialog.vue'
+import DesktopTaskSidebarExpandRow from '@/modules/tasks/widgets/task-index/DesktopTaskSidebarExpandRow.vue'
 import DesktopTaskSidebarSection from '@/modules/tasks/widgets/task-index/DesktopTaskSidebarSection.vue'
 import DesktopTaskSpaceRow from '@/modules/tasks/widgets/task-index/DesktopTaskSpaceRow.vue'
 import {
@@ -80,6 +81,7 @@ const {
   dropPinnedItem,
   endPinnedDrag,
   enterPinnedDropTarget,
+  expandConversationGroup,
   getTaskTitle,
   getPinnedDropPosition,
   isSectionExpanded,
@@ -101,7 +103,7 @@ const {
   requestTaskRename,
   saveSpace,
   selectSpaceMenuAction,
-  globalTasks,
+  taskRows,
   taskDeleteTarget,
   taskRenameTarget,
   taskTitleDraft,
@@ -207,6 +209,12 @@ function openSearchSpace(spaceId: string) {
                 @toggle="toggleSpace(item.space.id)"
               />
             </div>
+            <DesktopTaskSidebarExpandRow
+              v-else-if="item.kind === 'expand'"
+              :label="t('desktop.tasks.expandRemaining', { count: item.remaining })"
+              space-task
+              @expand="expandConversationGroup(item.groupKey)"
+            />
             <DesktopTaskRow
               v-else
               :task-id="item.task.id"
@@ -260,6 +268,12 @@ function openSearchSpace(spaceId: string) {
                 @toggle="toggleSpace(item.space.id)"
               />
             </div>
+            <DesktopTaskSidebarExpandRow
+              v-else-if="item.kind === 'expand'"
+              :label="t('desktop.tasks.expandRemaining', { count: item.remaining })"
+              space-task
+              @expand="expandConversationGroup(item.groupKey)"
+            />
             <DesktopTaskRow
               v-else
               :task-id="item.task.id"
@@ -280,8 +294,8 @@ function openSearchSpace(spaceId: string) {
 
         <DesktopTaskSidebarSection
           :expanded="isSectionExpanded('tasks')"
-          :items="globalTasks"
-          key-field="id"
+          :items="taskRows"
+          key-field="key"
           :label="t('desktop.tasks.tasksSection')"
           :priority="DESKTOP_TASK_SIDEBAR_SECTION_PRIORITIES.tasks"
           :scroll-index="scrollAnchors.tasks"
@@ -289,21 +303,27 @@ function openSearchSpace(spaceId: string) {
           @scroll="index => recordScrollAnchor('tasks', index)"
           @update:expanded="value => setSectionExpanded('tasks', value)"
         >
-          <template #default="{ item: task }">
+          <template #default="{ item }">
+            <DesktopTaskSidebarExpandRow
+              v-if="item.kind === 'expand'"
+              :label="t('desktop.tasks.expandRemaining', { count: item.remaining })"
+              @expand="expandConversationGroup(item.groupKey)"
+            />
             <DesktopTaskRow
-              :task-id="task.id"
-              :active="task.id === activeConversationId"
-              :activity="task.activity"
-              v-bind="markBindings(task.id)"
+              v-else-if="item.kind === 'task'"
+              :task-id="item.task.id"
+              :active="item.task.id === activeConversationId"
+              :activity="item.task.activity"
+              v-bind="markBindings(item.task.id)"
               :language="language"
               :now="relativeTimeNow"
-              :occurred-at="task.automationOccurrence?.scheduledFor ?? task.updatedAt"
+              :occurred-at="item.task.automationOccurrence?.scheduledFor ?? item.task.updatedAt"
               pin-mode="pin"
-              :title="getTaskTitle(task)"
-              @delete="requestTaskDelete(task)"
-              @open="emit('openTask', task.id)"
-              @pin="pinTask(task.id)"
-              @rename="requestTaskRename(task)"
+              :title="getTaskTitle(item.task)"
+              @delete="requestTaskDelete(item.task)"
+              @open="emit('openTask', item.task.id)"
+              @pin="pinTask(item.task.id)"
+              @rename="requestTaskRename(item.task)"
             />
           </template>
         </DesktopTaskSidebarSection>
diff --git a/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskSidebarExpandRow.vue b/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskSidebarExpandRow.vue
new file mode 100644
index 00000000..0ac27bce
--- /dev/null
+++ b/apps/buddy/src/modules/tasks/widgets/task-index/DesktopTaskSidebarExpandRow.vue
@@ -0,0 +1,68 @@
+<script setup lang="ts">
+defineProps<{
+  label: string
+  spaceTask?: boolean
+}>()
+const emit = defineEmits<{
+  expand: []
+}>()
+</script>
+
+<template>
+  <div
+    class="desktop-task-sidebar-expand-row"
+    :class="{ 'is-space-task': spaceTask }"
+  >
+    <button
+      class="desktop-task-sidebar-expand-row__button"
+      type="button"
+      @click="emit('expand')"
+    >
+      {{ label }}
+    </button>
+  </div>
+</template>
+
+<style scoped lang="scss">
+.desktop-task-sidebar-expand-row {
+  height: var(--buddy-task-sidebar-row-size, 2.5rem);
+  min-width: 0;
+  padding-right: var(--buddy-task-sidebar-scrollbar-gutter, 0);
+  padding-bottom: calc(var(--buddy-task-sidebar-row-size, 2.5rem) - var(--buddy-task-sidebar-row-height, 2.25rem));
+  padding-left: var(--buddy-task-sidebar-scrollbar-gutter, 0);
+
+  &.is-space-task {
+    padding-left: 1.75rem;
+  }
+}
+
+.desktop-task-sidebar-expand-row__button {
+  display: flex;
+  width: 100%;
+  height: var(--buddy-task-sidebar-row-height, 2.25rem);
+  align-items: center;
+  border: 0;
+  border-radius: var(--buddy-task-sidebar-state-radius, 8px);
+  background: transparent;
+  color: var(--buddy-text-muted);
+  cursor: pointer;
+  font-size: var(--buddy-task-sidebar-item-font-size, var(--buddy-sidebar-item-font-size));
+  font-weight: var(--buddy-sidebar-item-font-weight);
+  line-height: 20px;
+  padding: 0 0.5rem 0 6px;
+  text-align: left;
+  transition:
+    background-color var(--buddy-motion-state-duration) var(--buddy-motion-state-easing),
+    color var(--buddy-motion-state-duration) var(--buddy-motion-state-easing);
+
+  &:hover {
+    background: var(--buddy-state-hover);
+    color: var(--buddy-text-strong);
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--buddy-focus-ring);
+    outline-offset: -2px;
+  }
+}
+</style>
diff --git a/apps/buddy/src/modules/tasks/widgets/task-index/__tests__/taskPinnedItems.spec.ts b/apps/buddy/src/modules/tasks/widgets/task-index/__tests__/taskPinnedItems.spec.ts
new file mode 100644
index 00000000..d8b45db5
--- /dev/null
+++ b/apps/buddy/src/modules/tasks/widgets/task-index/__tests__/taskPinnedItems.spec.ts
@@ -0,0 +1,135 @@
+import type { LocalConversationSummary } from '@buddy-shared/conversation/conversationApi'
+import type { LocalSpace } from '@buddy-shared/spaces/spaceApi'
+import { describe, expect, it } from 'vitest'
+import {
+  DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT,
+  DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY,
+  resolveTaskIndexProjection,
+  spaceConversationGroupKey,
+} from '../taskPinnedItems'
+
+function createTask(id: string, spaceId: string | null): LocalConversationSummary {
+  return {
+    id,
+    spaceId,
+    title: id,
+    updatedAt: '2026-09-29T00:00:00.000Z',
+    activity: 'idle',
+  } as LocalConversationSummary
+}
+
+function createSpace(id: string): LocalSpace {
+  return {
+    id,
+    name: id,
+    icon: null,
+    iconColor: null,
+    primaryDirectory: null,
+    revokedAt: null,
+  } as unknown as LocalSpace
+}
+
+describe('taskIndexProjection pinned conversations', () => {
+  it('pins a conversation that belongs to a Space', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(['space-a']),
+      pinnedItems: [{ kind: 'conversation', id: 'task-a1' }],
+      spaces: [createSpace('space-a')],
+      tasks: [createTask('task-a1', 'space-a'), createTask('task-a2', 'space-a')],
+    })
+
+    expect(projection.pinnedRows).toEqual([
+      { task: expect.objectContaining({ id: 'task-a1' }), key: 'pinned:conversation:task-a1', kind: 'task', pinKey: 'conversation:task-a1', pinnedTopLevel: true },
+    ])
+    expect(projection.spaceRows.flatMap(row => row.kind === 'task' ? [row.task.id] : [])).toEqual(['task-a2'])
+  })
+
+  it('keeps a pinned Space conversation out of the pinned Space expansion', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(['space-a']),
+      pinnedItems: [{ kind: 'space', id: 'space-a' }, { kind: 'conversation', id: 'task-a1' }],
+      spaces: [createSpace('space-a')],
+      tasks: [createTask('task-a1', 'space-a'), createTask('task-a2', 'space-a')],
+    })
+
+    expect(projection.pinnedRows.map(row => row.key)).toEqual([
+      'pinned:space:space-a',
+      'pinned:space:space-a:conversation:task-a2',
+      'pinned:conversation:task-a1',
+    ])
+  })
+
+  it('drops pinned conversations that no longer exist', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(['space-a']),
+      pinnedItems: [{ kind: 'conversation', id: 'task-gone' }],
+      spaces: [createSpace('space-a')],
+      tasks: [createTask('task-a1', 'space-a')],
+    })
+
+    expect(projection.pinnedRows).toEqual([])
+  })
+})
+
+describe('taskIndexProjection conversation limit', () => {
+  const tasks = Array.from({ length: 8 }, (_, index) => createTask(`task-${index}`, null))
+
+  it('caps the tasks group and appends an expand row with the remaining count', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(),
+      pinnedItems: [],
+      spaces: [],
+      tasks,
+    })
+
+    expect(projection.taskRows).toHaveLength(DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT + 1)
+    expect(projection.taskRows.at(-1)).toEqual({
+      groupKey: DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY,
+      key: `${DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY}:expand`,
+      kind: 'expand',
+      remaining: 8 - DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT,
+    })
+  })
+
+  it('shows every conversation once the group is expanded', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedConversationGroups: new Set([DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY]),
+      expandedSpaceIds: new Set(),
+      pinnedItems: [],
+      spaces: [],
+      tasks,
+    })
+
+    expect(projection.taskRows).toHaveLength(tasks.length)
+    expect(projection.taskRows.some(row => row.kind === 'expand')).toBe(false)
+  })
+
+  it('caps a Space conversation list independently', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(['space-a']),
+      pinnedItems: [],
+      spaces: [createSpace('space-a')],
+      tasks: Array.from({ length: 7 }, (_, index) => createTask(`task-a${index}`, 'space-a')),
+    })
+
+    const taskRows = projection.spaceRows.filter(row => row.kind !== 'space')
+    expect(taskRows).toHaveLength(DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT + 1)
+    expect(taskRows.at(-1)).toMatchObject({
+      groupKey: spaceConversationGroupKey('space-a'),
+      kind: 'expand',
+      remaining: 2,
+    })
+  })
+
+  it('does not add an expand row when the group fits the limit', () => {
+    const projection = resolveTaskIndexProjection({
+      expandedSpaceIds: new Set(),
+      pinnedItems: [],
+      spaces: [],
+      tasks: tasks.slice(0, DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT),
+    })
+
+    expect(projection.taskRows).toHaveLength(DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT)
+    expect(projection.taskRows.some(row => row.kind === 'expand')).toBe(false)
+  })
+})
diff --git a/apps/buddy/src/modules/tasks/widgets/task-index/taskPinnedItems.ts b/apps/buddy/src/modules/tasks/widgets/task-index/taskPinnedItems.ts
index 46b731ce..9f50c87f 100644
--- a/apps/buddy/src/modules/tasks/widgets/task-index/taskPinnedItems.ts
+++ b/apps/buddy/src/modules/tasks/widgets/task-index/taskPinnedItems.ts
@@ -18,22 +18,39 @@ export type TaskIndexRow
     pinnedTopLevel?: boolean
     spaceTask?: boolean
   }
+  | {
+    groupKey: string
+    key: string
+    kind: 'expand'
+    remaining: number
+  }
 
 export interface TaskIndexProjection {
   pinnedItems: DesktopTaskPinnedItem[]
   pinnedRows: TaskIndexRow[]
   spaceRows: TaskIndexRow[]
-  globalTasks: LocalConversationSummary[]
+  taskRows: TaskIndexRow[]
 }
 
 export type DesktopTaskPinnedDropPosition = 'after' | 'before'
 
+export const DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT = 5
+export const DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY = 'tasks'
+
+export function spaceConversationGroupKey(spaceId: string): string {
+  return `space:${spaceId}`
+}
+
 export function resolveTaskIndexProjection(input: {
+  conversationLimit?: number
+  expandedConversationGroups?: ReadonlySet<string>
   expandedSpaceIds: ReadonlySet<string>
   pinnedItems: ReadonlyArray<DesktopTaskPinnedItem>
   spaces: ReadonlyArray<LocalSpace>
   tasks: ReadonlyArray<LocalConversationSummary>
 }): TaskIndexProjection {
+  const conversationLimit = input.conversationLimit ?? DESKTOP_TASK_SIDEBAR_CONVERSATION_LIMIT
+  const expandedGroups = input.expandedConversationGroups ?? new Set<string>()
   const activeSpaces = input.spaces.filter(space => space.revokedAt === null)
   const spacesById = new Map(activeSpaces.map(space => [space.id, space]))
   const globalTasks = input.tasks.filter(task => task.spaceId === null)
@@ -84,14 +101,19 @@ export function resolveTaskIndexProjection(input: {
       }]
       if (!input.expandedSpaceIds.has(space.id))
         return rows
-      const spaceTasks = tasksBySpace.get(space.id) ?? []
-      return rows.concat(spaceTasks.map(task => ({
+      const spaceTasks = (tasksBySpace.get(space.id) ?? [])
+        .filter(task => !pinnedConversationIds.has(task.id))
+      return rows.concat(capConversationRows(spaceTasks.map(task => ({
         task,
         key: `pinned:${pinKey}:conversation:${task.id}`,
         kind: 'task' as const,
         pinKey,
         spaceTask: true,
-      })))
+      })), {
+        expanded: expandedGroups.has(spaceConversationGroupKey(space.id)),
+        groupKey: spaceConversationGroupKey(space.id),
+        limit: conversationLimit,
+      }))
     }),
     spaceRows: activeSpaces
       .filter(space => !pinnedSpaceIds.has(space.id))
@@ -99,11 +121,45 @@ export function resolveTaskIndexProjection(input: {
         space,
         tasksBySpace.get(space.id) ?? [],
         input.expandedSpaceIds.has(space.id),
+        {
+          expanded: expandedGroups.has(spaceConversationGroupKey(space.id)),
+          limit: conversationLimit,
+        },
       )),
-    globalTasks: globalTasks.filter(task => !pinnedConversationIds.has(task.id)),
+    taskRows: capConversationRows(
+      globalTasks
+        .filter(task => !pinnedConversationIds.has(task.id))
+        .map(task => ({
+          task,
+          key: task.id,
+          kind: 'task' as const,
+        })),
+      {
+        expanded: expandedGroups.has(DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY),
+        groupKey: DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY,
+        limit: conversationLimit,
+      },
+    ),
   }
 }
 
+function capConversationRows(
+  rows: TaskIndexRow[],
+  input: { expanded: boolean, groupKey: string, limit: number },
+): TaskIndexRow[] {
+  if (input.expanded || rows.length <= input.limit)
+    return rows
+  return [
+    ...rows.slice(0, input.limit),
+    {
+      groupKey: input.groupKey,
+      key: `${input.groupKey}:expand`,
+      kind: 'expand',
+      remaining: rows.length - input.limit,
+    },
+  ]
+}
+
 export function prependDesktopTaskPinnedItem(
   items: ReadonlyArray<DesktopTaskPinnedItem>,
   item: DesktopTaskPinnedItem,
@@ -149,6 +205,7 @@ function createSpaceRows(
   space: LocalSpace,
   tasks: ReadonlyArray<LocalConversationSummary>,
   expanded: boolean,
+  conversationCap: { expanded: boolean, limit: number },
 ): TaskIndexRow[] {
   const rows: TaskIndexRow[] = [{
     key: `space:${space.id}`,
@@ -157,12 +214,16 @@ function createSpaceRows(
   }]
   if (!expanded)
     return rows
-  return rows.concat(tasks.map(task => ({
+  return rows.concat(capConversationRows(tasks.map(task => ({
     task,
     key: `space:${space.id}:conversation:${task.id}`,
     kind: 'task' as const,
     spaceTask: true,
-  })))
+  })), {
+    expanded: conversationCap.expanded,
+    groupKey: spaceConversationGroupKey(space.id),
+    limit: conversationCap.limit,
+  }))
 }
 
 function resolveVisiblePinnedItems(input: {
diff --git a/apps/buddy/src/modules/tasks/widgets/task-index/useTaskIndexController.ts b/apps/buddy/src/modules/tasks/widgets/task-index/useTaskIndexController.ts
index b1a0fa27..4c312fa1 100644
--- a/apps/buddy/src/modules/tasks/widgets/task-index/useTaskIndexController.ts
+++ b/apps/buddy/src/modules/tasks/widgets/task-index/useTaskIndexController.ts
@@ -9,10 +9,12 @@ import type { DesktopTaskPinnedDropPosition } from '@/modules/tasks/widgets/task
 import { useIntervalFn } from '@vueuse/core'
 import { computed, shallowRef, watch } from 'vue'
 import {
+  DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY,
   prependDesktopTaskPinnedItem,
   removeDesktopTaskPinnedItem,
   reorderDesktopTaskPinnedItems,
   resolveTaskIndexProjection,
+  spaceConversationGroupKey,
 } from '@/modules/tasks/widgets/task-index/taskPinnedItems'
 import { useTaskIndexManagement } from './useTaskIndexManagement'
 
@@ -37,7 +39,9 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
   const activeSpaces = computed(() => options.spaces.value.filter(
     space => space.revokedAt === null,
   ))
+  const expandedConversationGroups = shallowRef<ReadonlySet<string>>(new Set())
   const projection = computed(() => resolveTaskIndexProjection({
+    expandedConversationGroups: expandedConversationGroups.value,
     expandedSpaceIds: new Set(activeSpaces.value
       .filter(space => isSpaceExpanded(space.id))
       .map(space => space.id)),
@@ -48,7 +52,7 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
   const pinnedItems = computed(() => projection.value.pinnedItems)
   const pinnedRows = computed(() => projection.value.pinnedRows)
   const spaceRows = computed(() => projection.value.spaceRows)
-  const globalTasks = computed(() => projection.value.globalTasks)
+  const taskRows = computed(() => projection.value.taskRows)
 
   useIntervalFn(() => {
     relativeTimeNow.value = Date.now()
@@ -67,7 +71,10 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
   }
 
   function toggleSpace(spaceId: string) {
-    void options.sidebar().setSpaceExpanded(spaceId, !isSpaceExpanded(spaceId))
+    const expanded = !isSpaceExpanded(spaceId)
+    if (!expanded)
+      resetConversationGroups(groupKey => groupKey === spaceConversationGroupKey(spaceId))
+    void options.sidebar().setSpaceExpanded(spaceId, expanded)
   }
 
   function isSectionExpanded(section: DesktopTaskSidebarSection) {
@@ -75,9 +82,24 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
   }
 
   function setSectionExpanded(section: DesktopTaskSidebarSection, expanded: boolean) {
+    if (!expanded) {
+      resetConversationGroups(groupKey => section === 'tasks'
+        ? groupKey === DESKTOP_TASK_SIDEBAR_TASKS_GROUP_KEY
+        : groupKey.startsWith('space:'))
+    }
     void options.sidebar().setSectionExpanded(section, expanded)
   }
 
+  function expandConversationGroup(groupKey: string) {
+    expandedConversationGroups.value = new Set([groupKey])
+  }
+
+  function resetConversationGroups(predicate: (groupKey: string) => boolean) {
+    const next = [...expandedConversationGroups.value].filter(groupKey => !predicate(groupKey))
+    if (next.length !== expandedConversationGroups.value.size)
+      expandedConversationGroups.value = new Set(next)
+  }
+
   function recordScrollAnchor(section: DesktopTaskSidebarSection, index: number) {
     options.sidebar().recordScrollAnchor(section, index)
   }
@@ -142,8 +164,8 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
     dropPinnedItem,
     endPinnedDrag,
     enterPinnedDropTarget,
+    expandConversationGroup,
     getPinnedDropPosition,
-    globalTasks,
     isSectionExpanded,
     isSpaceExpanded,
     pinTask,
@@ -154,6 +176,7 @@ export function useTaskIndexController(options: UseTaskIndexControllerOptions) {
     scrollAnchors,
     setSectionExpanded,
     spaceRows,
+    taskRows,
     relativeTimeNow,
     toggleSpace,
     unpinItem,

From 8d91a59fa6649efa24556102c8b5ea8fe89e772c Mon Sep 17 00:00:00 2001
From: QAyong <QAyong@outlook.com>
Date: Tue, 29 Sep 2026 16:39:04 +0800
Subject: [PATCH 2/2] docs: add session list collapse preview

---
 pr-assets/session-list-collapse-demo.png | Bin 0 -> 12674 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 pr-assets/session-list-collapse-demo.png

diff --git a/pr-assets/session-list-collapse-demo.png b/pr-assets/session-list-collapse-demo.png
new file mode 100644
index 0000000000000000000000000000000000000000..7f0212ea8d42f156b06ac1711a9727dc3ada7fb2
GIT binary patch
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