refactor(vscode-ide-companion): 移除未使用的导入优化代码

- 从 InputPrompt 组件中删除未使用的 Hand、Siren、Switch 和 Tooltip 相关导入
- 从 Messages 组件中移除未使用的 useImperativeHandle 导入
- 从 SessionList 组件中删除未使用的 Columns2 和 ExternalLink 图标导入

Author: hqwlkj

packages/vscode-ide-companion/src/webview/components/InputPrompt.tsx

@@ -4,15 +4,13 @@ import SkillsTags from "@/webview/components/SkillsTags";
 import ContextIndicator from "@/webview/components/ContextIndicator";
 import { PromptAttachments, usePromptAttachments } from "@/webview/components/PromptAttachments";
 import type { ActiveEditor, EditingMessage, SessionMessage, SkillInfo, TokenTelemetry } from "@/webview/types";
-import { FileCodeIcon, Hand, Reply, Siren, Square, SquareChartGantt } from "lucide-react";
+import { FileCodeIcon, Hand, Reply, Square, SquareChartGantt } from "lucide-react";
 import { InputGroup, InputGroupAddon, InputGroupButton, InputGroupTextarea } from "@/webview/components/ui/input-group";
 import { Separator } from "@/webview/components/ui/separator";
 import { HoverCard, HoverCardContent, HoverCardTrigger } from "./ui/hover-card";
 import { cn } from "@/webview/lib/utils";
 import { Field, FieldDescription, FieldGroup } from "./ui/field";
 import { Spinner } from "@/webview/components/ui/spinner";
-import { Switch } from "@/webview/components/ui/switch";
-import { Tooltip, TooltipContent, TooltipTrigger } from "@/webview/components/ui/tooltip";
 import {
   DropdownMenu,
   DropdownMenuContent,

packages/vscode-ide-companion/src/webview/components/Messages.tsx

@@ -1,4 +1,4 @@
-import React, { useRef, useEffect, forwardRef, useImperativeHandle } from "react";
+import React, { useRef, useEffect, forwardRef } from "react";
 import { ScrollArea, ScrollBar } from "@/webview/components/ui/scroll-area";
 import UserBubble from "@/webview/components/bubbles/UserBubble";
 import AssistantBubble from "@/webview/components/bubbles/AssistantBubble";

packages/vscode-ide-companion/src/webview/components/SessionList.tsx

@@ -1,16 +1,6 @@
 import React, { useState, useMemo, useCallback, useRef, useEffect } from "react";
 import type { SessionSummary } from "@/webview/types";
-import {
-  MessageCircle,
-  PanelRight,
-  Search,
-  Pencil,
-  Trash2,
-  FileText,
-  Columns2,
-  ExternalLink,
-  FileCodeCorner,
-} from "lucide-react";
+import { MessageCircle, PanelRight, Search, Pencil, Trash2, FileText, FileCodeCorner } from "lucide-react";
 import { Empty, EmptyDescription, EmptyMedia, EmptyHeader, EmptyTitle } from "@/webview/components/ui/empty";
 import { cn } from "@/webview/lib/utils";
 import { Item, ItemActions, ItemContent, ItemDescription, ItemGroup, ItemTitle } from "./ui/item";