chore: 移除未使用的导入和变量

- ChatHeader.vue: 移除未使用的 Download 图标
- MessageList.vue: 移除未使用的 boxRef 变量
- ChatInput.vue: 移除未使用的 AttachmentPreview 组件导入
- MessageBubble.vue: 移除未使用的 Download 图标
- ConversationSettingsModal.vue: 移除未使用的 chatApi 导入
- SettingsModal.vue: 移除未使用的 chatApi 导入
- ChatSidebar.vue: 移除未使用的图标导入和注释代码对应的函数

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

src/components/chat/ChatHeader.vue

@@ -90,7 +90,6 @@ import { ref } from "vue";
 import {
   Menu,
   Trash2,
-  Download,
   ChevronLeft,
   ExternalLink,
   Pin,

src/components/chat/MessageList.vue

@@ -1,5 +1,5 @@
 <template>
-  <div ref="boxRef" class="message-list-container">
+  <div class="message-list-container">
     <div ref="containerRef" class="message-list" @scroll="handleScroll">
       <!-- 欢迎界面 -->
       <WelcomeScreen
@@ -103,8 +103,7 @@ const emit = defineEmits<{
 const chatStore = useChatStore();
 
 // 响应式状态
-const boxRef: any = ref<HTMLElement | null>(null);
-const containerRef: any = ref<HTMLElement | null>(null);
+const containerRef = ref<HTMLElement | null>(null);
 const showScrollButton = ref(false);
 const newMessageCount = ref(0);
 const isAutoScrolling = ref(true);

src/components/input/ChatInput.vue

@@ -162,7 +162,6 @@ import {
   Brain,
   Loader2,
 } from "@/components/icons";
-import AttachmentPreview from "./AttachmentPreview.vue";
 import { generateId } from "@/utils/helpers";
 import type { Attachment } from "@/types/chat";
 import { chatApi } from "@/services/api";

src/components/message/MessageBubble.vue

@@ -195,7 +195,6 @@ import {
   Zap,
   Maximize2,
   Play,
-  Download,
 } from "@/components/icons";
 import MessageActions from "./MessageActions.vue";
 import { formatTimestamp, formatFileSize, getFileIcon } from "@/utils/helpers";

src/components/modals/ConversationSettingsModal.vue

@@ -200,7 +200,6 @@ import FormSwitch from "@/components/ui/FormSwitch.vue";
 import FormSlider from "@/components/ui/FormSlider.vue";
 import FormSelect from "@/components/ui/FormSelect.vue";
 import { MessageSquare, X, Check, Trash2 } from "@/components/icons";
-import { chatApi } from "@/services/api.ts";
 import type { ConversationSettings } from "@/types/chat";
 import { MessageRole, MessageType } from "@/types/chat";
 

src/components/modals/SettingsModal.vue

@@ -400,7 +400,6 @@ import {
   RotateCcw,
 } from "@/components/icons";
 import type { AppSettings } from "@/types/chat";
-import { chatApi } from "@/services/api.ts";
 
 const settingsStore = useSettingsStore();
 

src/components/sidebar/ChatSidebar.vue

@@ -154,18 +154,12 @@ import { useSettingsStore } from "@/stores/settings";
 import { chatApi } from "@/services/api.ts";
 import ConversationItem from "./ConversationItem.vue";
 import {
-  Bot,
   Plus,
-  Search,
   Pin,
-  Clock,
   MessageSquare,
   Sun,
   Moon,
   Monitor,
-  Keyboard,
-  Settings,
-  ChevronLeft,
   Sparkles,
   ChevronDown,
   Check,
@@ -240,26 +234,10 @@ function togglePinConversation(id: string) {
   chatStore.togglePinConversation(id);
 }
 
-function toggleSidebar() {
-  settingsStore.toggleSidebar();
-}
-
 function toggleTheme() {
   settingsStore.toggleTheme();
 }
 
-function openShortcuts() {
-  settingsStore.openShortcutsModal();
-}
-
-function openSettings() {
-  settingsStore.openSettingsModal();
-}
-
-function openSearch() {
-  settingsStore.openSearchModal();
-}
-
 // 拖拽调整宽度
 const isResizing = ref(false);