feat(core): auto collapse ai chips (#10209)

Support issue [BS-2545](https://linear.app/affine-design/issue/BS-2545).

Automatically collapse the AI chips when starting a new chat.

![截屏2025-02-16 19.07.05.png](https://graphite-user-uploaded-assets-prod.s3.amazonaws.com/sJGviKxfE3Ap685cl5bj/eac6f760-3b07-410d-863c-9f15c99df58a.png)

packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-context.ts

@@ -18,6 +18,14 @@ export type ChatAction = {
 
 export type ChatItem = ChatMessage | ChatAction;
 
+export function isChatAction(item: ChatItem): item is ChatAction {
+  return 'action' in item;
+}
+
+export function isChatMessage(item: ChatItem): item is ChatMessage {
+  return 'role' in item;
+}
+
 export type ChatStatus =
   | 'loading'
   | 'success'

packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-chips.ts

@@ -6,8 +6,8 @@ import { createLitPortal } from '@blocksuite/affine/blocks';
 import { WithDisposable } from '@blocksuite/affine/global/utils';
 import { PlusIcon } from '@blocksuite/icons/lit';
 import { flip, offset } from '@floating-ui/dom';
-import { css, html } from 'lit';
-import { property, query } from 'lit/decorators.js';
+import { css, html, nothing, type PropertyValues } from 'lit';
+import { property, query, state } from 'lit/decorators.js';
 import { repeat } from 'lit/directives/repeat.js';
 
 import { AIProvider } from '../provider';
@@ -21,7 +21,8 @@ export class ChatPanelChips extends WithDisposable(ShadowlessElement) {
       display: flex;
       flex-wrap: wrap;
     }
-    .add-button {
+    .add-button,
+    .collapse-button {
       display: flex;
       align-items: center;
       justify-content: center;
@@ -32,8 +33,10 @@ export class ChatPanelChips extends WithDisposable(ShadowlessElement) {
       margin: 4px 0;
       box-sizing: border-box;
       cursor: pointer;
+      font-size: 12px;
     }
-    .add-button:hover {
+    .add-button:hover,
+    .collapse-button:hover {
       background-color: var(--affine-hover-color);
     }
   `;
@@ -61,13 +64,25 @@ export class ChatPanelChips extends WithDisposable(ShadowlessElement) {
   @query('.add-button')
   accessor addButton!: HTMLDivElement;
 
+  @state()
+  accessor isCollapsed = false;
+
   override render() {
+    const isCollapsed =
+      this.isCollapsed &&
+      this.chatContextValue.chips.filter(c => c.state !== 'candidate').length >
+        1;
+
+    const chips = isCollapsed
+      ? this.chatContextValue.chips.slice(0, 1)
+      : this.chatContextValue.chips;
+
     return html` <div class="chips-wrapper">
       <div class="add-button" @click=${this._toggleAddDocMenu}>
         ${PlusIcon()}
       </div>
       ${repeat(
-        this.chatContextValue.chips,
+        chips,
         chip => getChipKey(chip),
         chip => {
           if (isDocChip(chip)) {
@@ -88,9 +103,28 @@ export class ChatPanelChips extends WithDisposable(ShadowlessElement) {
           return null;
         }
       )}
+      ${isCollapsed
+        ? html`<div class="collapse-button" @click=${this._toggleCollapse}>
+            +${this.chatContextValue.chips.length - 1}
+          </div>`
+        : nothing}
     </div>`;
   }
 
+  protected override updated(_changedProperties: PropertyValues): void {
+    if (
+      _changedProperties.has('chatContextValue') &&
+      _changedProperties.get('chatContextValue')?.status === 'loading' &&
+      this.isCollapsed === false
+    ) {
+      this.isCollapsed = true;
+    }
+  }
+
+  private readonly _toggleCollapse = () => {
+    this.isCollapsed = !this.isCollapsed;
+  };
+
   private readonly _toggleAddDocMenu = () => {
     if (this._abortController) {
       this._abortController.abort();

packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-messages.ts

@@ -24,7 +24,12 @@ import {
 import { AffineAvatarIcon, AffineIcon, DownArrowIcon } from '../_common/icons';
 import { AIChatErrorRenderer } from '../messages/error';
 import { AIProvider } from '../provider';
-import type { ChatContextValue, ChatItem, ChatMessage } from './chat-context';
+import {
+  type ChatContextValue,
+  type ChatItem,
+  type ChatMessage,
+  isChatMessage,
+} from './chat-context';
 import { HISTORY_IMAGE_ACTIONS } from './const';
 import { AIPreloadConfig } from './preload-config';
 
@@ -207,7 +212,7 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
     const { isLoading } = this;
     const filteredItems = items.filter(item => {
       return (
-        'role' in item ||
+        isChatMessage(item) ||
         item.messages?.length === 3 ||
         (HISTORY_IMAGE_ACTIONS.includes(item.action) &&
           item.messages?.length === 2)
@@ -244,7 +249,7 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
             </div> `
           : repeat(
               filteredItems,
-              item => ('role' in item ? item.id : item.sessionId),
+              item => (isChatMessage(item) ? item.id : item.sessionId),
               (item, index) => {
                 const isLast = index === filteredItems.length - 1;
                 return html`<div class="message">
@@ -317,7 +322,7 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
       return AIChatErrorRenderer(host, error);
     }
 
-    if ('role' in item) {
+    if (isChatMessage(item)) {
       const state = isLast
         ? status !== 'loading' && status !== 'transmitting'
           ? 'finished'
@@ -375,8 +380,8 @@ export class ChatPanelMessages extends WithDisposable(ShadowlessElement) {
   }
 
   renderAvatar(item: ChatItem) {
-    const isUser = 'role' in item && item.role === 'user';
-    const isAssistant = 'role' in item && item.role === 'assistant';
+    const isUser = isChatMessage(item) && item.role === 'user';
+    const isAssistant = isChatMessage(item) && item.role === 'assistant';
     const isWithDocs =
       isAssistant &&
       item.content &&