diff --git a/src/App.tsx b/src/App.tsx
index 143c1ab..f95a8a9 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -24,6 +24,8 @@ function AppContent() {
   
   const { showPromptPanel, setShowPromptPanel, setShowHistory } = useAppStore();
   const [hoveredImage, setHoveredImage] = useState<{url: string, title: string, width?: number, height?: number} | null>(null);
+  const [previewPosition, setPreviewPosition] = useState<{x: number, y: number} | null>(null);
+  const [isPreviewVisible, setIsPreviewVisible] = useState(false);
   
   // 在挂载时初始化IndexedDB并清理base64数据
   useEffect(() => {
@@ -73,6 +75,19 @@ function AppContent() {
     return () => clearInterval(interval);
   }, []);
 
+  // 控制预览窗口的显示和隐藏动画
+  useEffect(() => {
+    if (hoveredImage) {
+      // 延迟一小段时间后设置为可见，以触发动画
+      const timer = setTimeout(() => {
+        setIsPreviewVisible(true);
+      }, 10);
+      return () => clearTimeout(timer);
+    } else {
+      setIsPreviewVisible(false);
+    }
+  }, [hoveredImage]);
+
   return (
     <div className="h-screen bg-gray-50 text-gray-900 flex flex-col font-sans">
       <div className="card card-lg rounded-none">
@@ -92,7 +107,7 @@ function AppContent() {
         </div>
         <div className="flex-shrink-0">
           <div className="h-full card card-lg">
-            <HistoryPanel setHoveredImage={setHoveredImage} />
+            <HistoryPanel setHoveredImage={setHoveredImage} setPreviewPosition={setPreviewPosition} />
           </div>
         </div>
       </div>
@@ -102,7 +117,14 @@ function AppContent() {
         <div 
           className="fixed inset-0 z-[99999] flex items-center justify-center pointer-events-none"
         >
-          <div className="bg-white rounded-xl shadow-2xl border border-gray-300 overflow-hidden max-w-2xl max-h-[80vh] flex flex-col">
+          <div 
+            className="bg-white rounded-xl shadow-2xl border border-gray-300 overflow-hidden max-w-2xl max-h-[80vh] flex flex-col transition-all duration-200 ease-out"
+            style={{
+              transform: isPreviewVisible ? 'scale(1)' : 'scale(0.8)',
+              opacity: isPreviewVisible ? 1 : 0,
+              transformOrigin: previewPosition ? `${previewPosition.x}px ${previewPosition.y}px` : 'center'
+            }}
+          >
             <div className="bg-gray-900 text-white text-sm p-3 truncate font-medium">
               {hoveredImage.title}
             </div>
diff --git a/src/components/HistoryPanel.tsx b/src/components/HistoryPanel.tsx
index 8e460a4..63c0caf 100644
--- a/src/components/HistoryPanel.tsx
+++ b/src/components/HistoryPanel.tsx
@@ -9,7 +9,10 @@ import { useIndexedDBListener } from '../hooks/useIndexedDBListener';
 import { DayPicker } from 'react-day-picker';
 import zhCN from 'react-day-picker/dist/locale/zh-CN';
 
-export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, title: string, width?: number, height?: number} | null) => void }> = ({ setHoveredImage }) => {
+export const HistoryPanel: React.FC<{ 
+  setHoveredImage: (image: {url: string, title: string, width?: number, height?: number} | null) => void,
+  setPreviewPosition?: (position: {x: number, y: number} | null) => void 
+}> = ({ setHoveredImage, setPreviewPosition }) => {
   const {
     currentProject,
     canvasImage,
@@ -534,6 +537,10 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                             width: img.width,
                             height: img.height
                           });
+                          // 传递鼠标位置信息给App组件
+                          if (setPreviewPosition) {
+                            setPreviewPosition({ x: e.clientX, y: e.clientY });
+                          }
                         };
                         img.onerror = (error) => {
                           console.error('图像加载失败:', error);
@@ -544,6 +551,10 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                             width: 0,
                             height: 0
                           });
+                          // 传递鼠标位置信息给App组件
+                          if (setPreviewPosition) {
+                            setPreviewPosition({ x: e.clientX, y: e.clientY });
+                          }
                         };
                         img.src = imageUrl;
                       }
@@ -553,6 +564,9 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                     }}
                     onMouseLeave={() => {
                       setHoveredImage(null);
+                      if (setPreviewPosition) {
+                        setPreviewPosition(null);
+                      }
                     }}
                   >
                     {(() => {
@@ -631,6 +645,10 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                             width: img.width,
                             height: img.height
                           });
+                          // 传递鼠标位置信息给App组件
+                          if (setPreviewPosition) {
+                            setPreviewPosition({ x: e.clientX, y: e.clientY });
+                          }
                         };
                         img.onerror = (error) => {
                           console.error('图像加载失败:', error);
@@ -641,6 +659,10 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                             width: 0,
                             height: 0
                           });
+                          // 传递鼠标位置信息给App组件
+                          if (setPreviewPosition) {
+                            setPreviewPosition({ x: e.clientX, y: e.clientY });
+                          }
                         };
                         img.src = imageUrl;
                       }
@@ -650,6 +672,9 @@ export const HistoryPanel: React.FC<{ setHoveredImage: (image: {url: string, tit
                     }}
                     onMouseLeave={() => {
                       setHoveredImage(null);
+                      if (setPreviewPosition) {
+                        setPreviewPosition(null);
+                      }
                     }}
                   >
                     {(() => {
diff --git a/src/services/uploadService.ts b/src/services/uploadService.ts
index 3e973cf..8e155fe 100644
--- a/src/services/uploadService.ts
+++ b/src/services/uploadService.ts
@@ -8,7 +8,7 @@ const UPLOAD_URL = import.meta.env.VITE_UPLOAD_API
 const uploadCache = new Map<string, UploadResult>()
 
 // 缓存配置
-const MAX_CACHE_SIZE = 50 // 减少最大缓存条目数
+const MAX_CACHE_SIZE = 20 // 减少最大缓存条目数
 const CACHE_EXPIRY_TIME = 15 * 60 * 1000 // 缓存过期时间15分钟
 
 /**