feat: switch file list from dialog to inline panel

- Replace dialog-based file list with inline panel in sidebar
- Click file list button now switches panel content instead of opening popup
- Add CanvasFileListPanel component for embedded file list view
- Fix thumbnail property name and type casting issues
- Add placeholder handleAction function

app/canvas/[id]/page.tsx

@@ -62,10 +62,10 @@ import { useCanvasStore, canvasSelectors } from "@/store/canvas";
 import { canvasService, imageGenerationService } from "@/services/canvas";
 import { CanvasWorkspace } from "@/components/canvas";
 import { CanvasChatPanel } from "@/components/canvas/CanvasChatPanel";
-import { CanvasFileList } from "@/components/canvas/CanvasFileList";
+import { CanvasFileListPanel } from "@/components/canvas/CanvasFileListPanel";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { cn } from "@/lib/utils";
-import { MessageSquare, FolderOpen } from "lucide-react";
+import { MessageSquare, FolderOpen, Grid2X2 } from "lucide-react";
 
 interface PageProps {
   params: Promise<{ id: string }>;
@@ -116,7 +116,8 @@ export default function CanvasEditorPage({ params }: PageProps) {
   const [isEditingTitle, setIsEditingTitle] = useState(false);
   const [editTitle, setEditTitle] = useState("");
   const [isPanelOpen, setIsPanelOpen] = useState(true);
-  const [isFileListOpen, setIsFileListOpen] = useState(false);
+  // 面板模式: 'chat' 聊天面板, 'fileList' 文件列表
+  const [panelMode, setPanelMode] = useState<'chat' | 'fileList'>('chat');
   
   // 生成配置
   const [prompt, setPrompt] = useState("");
@@ -173,17 +174,18 @@ export default function CanvasEditorPage({ params }: PageProps) {
     const autoTitleAndThumbnail = async () => {
       // 如果标题是默认值，且有图片节点
       if ((projectTitle === "未命名画布" || projectTitle === "新画布") && nodes.length > 0) {
-        const imageNode = nodes.find(n => n.type === 'image' && n.data?.src);
-        if (imageNode?.data?.src) {
+        const imageNode = nodes.find(n => n.type === 'image' && (n.data as any)?.src);
+        const imageSrc = (imageNode?.data as any)?.src;
+        if (imageSrc) {
           try {
             // 1. 设置缩略图
-            await canvasService.updateProject(id, { thumbnailUrl: imageNode.data.src });
+            await canvasService.updateProject(id, { thumbnail: imageSrc });
             
             // 2. 智能命名
             const res = await fetch('/api/canvas/auto-title', {
               method: 'POST',
               headers: { 'Content-Type': 'application/json' },
-              body: JSON.stringify({ imageUrl: imageNode.data.src })
+              body: JSON.stringify({ imageUrl: imageSrc })
             });
             const data = await res.json();
             if (data.title) {
@@ -274,6 +276,16 @@ export default function CanvasEditorPage({ params }: PageProps) {
     });
   };
 
+  // 处理图片操作（占位函数，后续实现具体逻辑）
+  const handleAction = (action: string) => {
+    if (!selectedImageNode) {
+      toast.error("请先选择一张图片");
+      return;
+    }
+    toast.info(`${action} 功能开发中...`);
+    // TODO: 实现具体的图片处理逻辑
+  };
+
   // AI 生成图片
   const handleGenerate = async () => {
     if (!prompt.trim()) {
@@ -442,10 +454,16 @@ export default function CanvasEditorPage({ params }: PageProps) {
                <Button 
                  variant="ghost" 
                  size="sm" 
-                 onClick={() => setIsFileListOpen(true)}
-                 className="h-8 gap-2 px-2 font-normal hover:bg-muted rounded-lg"
+                 onClick={() => {
+                   setPanelMode('fileList');
+                   setIsPanelOpen(true);
+                 }}
+                 className={cn(
+                   "h-8 gap-2 px-2 font-normal hover:bg-muted rounded-lg",
+                   panelMode === 'fileList' && isPanelOpen && "bg-muted"
+                 )}
                >
-                 <FolderOpen className="h-4 w-4 text-muted-foreground" />
+                 <Grid2X2 className="h-4 w-4 text-muted-foreground" />
                  <span className="text-sm font-medium max-w-[200px] truncate">
                    {projectTitle}
                  </span>
@@ -492,13 +510,21 @@ export default function CanvasEditorPage({ params }: PageProps) {
         {/* 4. Floating Sidebar (Right) */}
         <div className={cn(
             "absolute top-16 right-4 bottom-4 z-10 w-[400px] transition-all duration-300 ease-in-out",
-            isPanelOpen ? "translate-x-0 opacity-100" : "translate-x-[120%] opacity-0"
+            isPanelOpen ? "translate-x-0 opacity-100" : "translate-x-[120%] opacity-0 pointer-events-none"
         )}>
             <div className="h-full w-full rounded-2xl border bg-background/95 backdrop-blur-md shadow-2xl overflow-hidden flex flex-col">
-              {/* AI 对话内容 */}
-              <div className="flex-1 overflow-hidden">
-                <CanvasChatPanel chatId={`canvas-${id}`} onClose={() => setIsPanelOpen(false)} />
-              </div>
+              {panelMode === 'chat' ? (
+                // AI 对话内容
+                <div className="flex-1 overflow-hidden">
+                  <CanvasChatPanel chatId={`canvas-${id}`} onClose={() => setIsPanelOpen(false)} />
+                </div>
+              ) : (
+                // 文件列表
+                <CanvasFileListPanel 
+                  currentId={id} 
+                  onClose={() => setPanelMode('chat')} 
+                />
+              )}
             </div>
         </div>
 
@@ -662,12 +688,6 @@ export default function CanvasEditorPage({ params }: PageProps) {
         </div>
 
       </div>
-
-      <CanvasFileList 
-        open={isFileListOpen} 
-        onOpenChange={setIsFileListOpen}
-        currentId={id}
-      />
     </TooltipProvider>
   );
 }

components/canvas/CanvasFileList.tsx

@@ -132,9 +132,9 @@ export function CanvasFileList({ open, onOpenChange, currentId }: CanvasFileList
                 >
                   {/* 缩略图 */}
                   <div className="h-12 w-12 rounded-lg bg-muted/50 overflow-hidden shrink-0 border">
-                    {project.thumbnailUrl ? (
+                    {project.thumbnail ? (
                       <img 
-                        src={project.thumbnailUrl} 
+                        src={project.thumbnail} 
                         alt={project.title}
                         className="h-full w-full object-cover"
                       />

components/canvas/CanvasFileListPanel.tsx

@@ -0,0 +1,184 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { useRouter } from "next/navigation";
+import { formatDistanceToNow } from "date-fns";
+import { zhCN } from "date-fns/locale";
+import { Trash2, FileImage, Loader2, Plus, X } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { ScrollArea } from "@/components/ui/scroll-area";
+import { canvasService } from "@/services/canvas";
+import { toast } from "sonner";
+import { cn } from "@/lib/utils";
+import type { CanvasProject } from "@/types/canvas";
+
+interface CanvasFileListPanelProps {
+  currentId: string;
+  onClose: () => void;
+}
+
+export function CanvasFileListPanel({ currentId, onClose }: CanvasFileListPanelProps) {
+  const router = useRouter();
+  const [projects, setProjects] = useState<CanvasProject[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+
+  // 加载项目列表
+  const loadProjects = async () => {
+    setIsLoading(true);
+    const result = await canvasService.getProjects();
+    if (result.success && result.data) {
+      // 按更新时间降序排序
+      const sorted = result.data.sort((a, b) => 
+        new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime()
+      );
+      setProjects(sorted);
+    }
+    setIsLoading(false);
+  };
+
+  useEffect(() => {
+    loadProjects();
+  }, []);
+
+  // 创建新画布
+  const handleCreateNew = async () => {
+    const newId = crypto.randomUUID();
+    router.push(`/canvas/${newId}`);
+  };
+
+  // 切换画布
+  const handleSwitch = (id: string) => {
+    if (id === currentId) {
+      onClose();
+      return;
+    }
+    router.push(`/canvas/${id}`);
+  };
+
+  // 删除画布
+  const handleDelete = async (e: React.MouseEvent, id: string) => {
+    e.stopPropagation();
+    if (!confirm("确定要删除这个画布吗？")) return;
+
+    const result = await canvasService.deleteProject(id);
+    if (result.success) {
+      setProjects(prev => prev.filter(p => p.id !== id));
+      toast.success("删除成功");
+      
+      // 如果删除的是当前画布，跳转到列表第一个或创建新的
+      if (id === currentId) {
+        const next = projects.find(p => p.id !== id);
+        if (next) {
+          router.push(`/canvas/${next.id}`);
+        } else {
+          handleCreateNew();
+        }
+      }
+    } else {
+      toast.error("删除失败");
+    }
+  };
+
+  return (
+    <div className="flex flex-col h-full">
+      {/* Header */}
+      <div className="flex items-center justify-between p-4 border-b shrink-0">
+        <h2 className="font-semibold text-lg">已生成文件列表</h2>
+        <Button 
+          variant="ghost" 
+          size="icon" 
+          onClick={onClose}
+          className="h-8 w-8 rounded-lg"
+        >
+          <X className="h-4 w-4" />
+        </Button>
+      </div>
+
+      {/* Content */}
+      <ScrollArea className="flex-1">
+        <div className="p-4">
+          {isLoading ? (
+            <div className="flex justify-center py-12">
+              <Loader2 className="h-6 w-6 animate-spin text-muted-foreground" />
+            </div>
+          ) : projects.length === 0 ? (
+            <div className="text-center py-12 text-muted-foreground">
+              <FileImage className="h-12 w-12 mx-auto mb-3 opacity-20" />
+              <p>暂无画布历史</p>
+              <Button 
+                variant="outline" 
+                size="sm" 
+                onClick={handleCreateNew}
+                className="mt-4"
+              >
+                <Plus className="h-4 w-4 mr-1" />
+                新建画布
+              </Button>
+            </div>
+          ) : (
+            <div className="space-y-2">
+              {projects.map((project) => (
+                <div
+                  key={project.id}
+                  onClick={() => handleSwitch(project.id)}
+                  className={cn(
+                    "group flex items-center gap-3 p-3 rounded-xl cursor-pointer transition-all",
+                    "hover:bg-muted/50",
+                    project.id === currentId 
+                      ? "bg-primary/5 ring-1 ring-primary/20" 
+                      : "bg-card"
+                  )}
+                >
+                  {/* 缩略图 */}
+                  <div className="h-14 w-14 rounded-lg bg-muted/50 overflow-hidden shrink-0 border">
+                    {project.thumbnail ? (
+                      <img 
+                        src={project.thumbnail} 
+                        alt={project.title}
+                        className="h-full w-full object-cover"
+                      />
+                    ) : (
+                      <div className="h-full w-full flex items-center justify-center">
+                        <FileImage className="h-6 w-6 text-muted-foreground/40" />
+                      </div>
+                    )}
+                  </div>
+
+                  {/* 信息 */}
+                  <div className="flex-1 min-w-0">
+                    <h4 className={cn(
+                      "font-medium text-sm truncate",
+                      project.id === currentId && "text-primary"
+                    )}>
+                      {project.title || "未命名画布"}
+                    </h4>
+                    <p className="text-xs text-muted-foreground mt-0.5">
+                      {formatDistanceToNow(new Date(project.updatedAt), { 
+                        addSuffix: true, 
+                        locale: zhCN 
+                      })}
+                    </p>
+                  </div>
+
+                  {/* 删除按钮 */}
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    className="h-8 w-8 text-muted-foreground hover:text-destructive opacity-0 group-hover:opacity-100 transition-opacity"
+                    onClick={(e) => handleDelete(e, project.id)}
+                  >
+                    <Trash2 className="h-4 w-4" />
+                  </Button>
+                </div>
+              ))}
+              
+              <div className="text-center py-6 text-xs text-muted-foreground/50">
+                到底了
+              </div>
+            </div>
+          )}
+        </div>
+      </ScrollArea>
+    </div>
+  );
+}