diff --git a/components/image-annotator.tsx b/components/image-annotator.tsx
index cfc704be2..cb2d50eaa 100644
--- a/components/image-annotator.tsx
+++ b/components/image-annotator.tsx
@@ -2,7 +2,7 @@
 
 import React, { useRef, useState, useEffect, useCallback } from "react";
 import { createPortal } from "react-dom";
-import { X, Pencil, Circle, ArrowRight, Type, Check, Undo, Trash2, Scissors, Sparkles, Download, Expand, Move, Maximize2 } from "lucide-react";
+import { X, Pencil, Circle, ArrowRight, Type, Check, Undo, Trash2, Scissors, Sparkles, Download, Expand, Move, Maximize2, ZoomIn, ZoomOut } from "lucide-react";
 import { Button } from "./ui/button";
 import { Input } from "./ui/input";
 import { toast } from "sonner";
@@ -539,6 +539,18 @@ export function ImageAnnotator({ imageUrl, onConfirm, onCancel }: ImageAnnotator
     setDragStart(null);
   };
 
+  // 尺寸调整：放大图片
+  const handleResizeZoomIn = () => {
+    if (!isResizeMode) return;
+    setResizeImageScale((prev) => Math.min(prev * 1.2, 5)); // 最大5倍
+  };
+
+  // 尺寸调整：缩小图片
+  const handleResizeZoomOut = () => {
+    if (!isResizeMode) return;
+    setResizeImageScale((prev) => Math.max(prev / 1.2, 0.1)); // 最小0.1倍
+  };
+
   // 尺寸调整：处理图片缩放（鼠标滚轮）
   const handleResizeImageWheel = (e: React.WheelEvent) => {
     if (!isResizeMode || !image) return;
@@ -883,18 +895,12 @@ export function ImageAnnotator({ imageUrl, onConfirm, onCancel }: ImageAnnotator
   // 弹窗内容
   const modalContent = (
     <div 
-      className="fixed inset-0 z-[9999] flex items-center justify-center bg-black/70 backdrop-blur-md p-4"
+      className="fixed inset-0 z-[9999] flex items-center justify-center bg-background"
       onClick={onCancel}
     >
-      {/* 弹窗容器 - 使用与preview-attachment相同的居中方式 */}
+      {/* 弹窗容器 - 全屏显示 */}
       <div 
-        className="flex flex-col overflow-hidden rounded-xl border border-border bg-background shadow-2xl"
-        style={{ 
-          width: "1200px", 
-          height: "550px",
-          maxWidth: "95vw",
-          maxHeight: "90vh"
-        }}
+        className="flex flex-col overflow-hidden w-full h-full"
         onClick={(e) => e.stopPropagation()}
       >
         {/* 顶部标题栏 */}
@@ -960,73 +966,163 @@ export function ImageAnnotator({ imageUrl, onConfirm, onCancel }: ImageAnnotator
           </div>
         </div>
 
-        {/* 工具选择栏 */}
-        <div className="flex flex-wrap items-center justify-center gap-3 border-b px-4 py-2">
-          {/* 工具按钮 */}
-          <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
-            <button
-              type="button"
-              className={`rounded-md p-1.5 transition-colors ${tool === "pen" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
-              onClick={() => setTool("pen")}
-              title="画笔"
-            >
-              <Pencil className="h-4 w-4" />
-            </button>
-            <button
-              type="button"
-              className={`rounded-md p-1.5 transition-colors ${tool === "arrow" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
-              onClick={() => setTool("arrow")}
-              title="箭头"
-            >
-              <ArrowRight className="h-4 w-4" />
-            </button>
-            <button
-              type="button"
-              className={`rounded-md p-1.5 transition-colors ${tool === "circle" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
-              onClick={() => setTool("circle")}
-              title="圆圈"
-            >
-              <Circle className="h-4 w-4" />
-            </button>
-            <button
-              type="button"
-              className={`rounded-md p-1.5 transition-colors ${tool === "text" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
-              onClick={() => setTool("text")}
-              title="文字"
-            >
-              <Type className="h-4 w-4" />
-            </button>
-          </div>
-
-          {/* 颜色选择 */}
-          <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
-            {COLORS.map((c) => (
-              <button
-                key={c}
-                type="button"
-                className={`h-6 w-6 rounded-full border-2 transition-transform ${color === c ? "scale-110 border-primary" : "border-transparent hover:scale-105"}`}
-                style={{ backgroundColor: c }}
-                onClick={() => setColor(c)}
-                title={c}
+        {/* 工具选择栏 / 尺寸调整工具栏 */}
+        {isResizeMode ? (
+          /* 尺寸调整模式下显示尺寸调整工具栏 */
+          <div className="flex items-center gap-4 border-b px-4 py-3 bg-muted/30">
+            <div className="flex items-center gap-2">
+              <label className="text-sm font-medium">宽度:</label>
+              <Input
+                type="number"
+                value={resizeCanvasWidth}
+                onChange={(e) => setResizeCanvasWidth(Number.parseInt(e.target.value) || 1)}
+                className="w-24 h-8"
+                min={1}
+                max={10000}
               />
-            ))}
-          </div>
-
-          {/* 线宽选择 */}
-          <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
-            {LINE_WIDTHS.map((w) => (
-              <button
-                key={w}
-                type="button"
-                className={`flex h-7 w-7 items-center justify-center rounded-md transition-colors ${lineWidth === w ? "bg-primary/20" : "hover:bg-muted-foreground/10"}`}
-                onClick={() => setLineWidth(w)}
-                title={`线宽 ${w}px`}
+              <span className="text-xs text-muted-foreground">px</span>
+            </div>
+            <div className="flex items-center gap-2">
+              <label className="text-sm font-medium">高度:</label>
+              <Input
+                type="number"
+                value={resizeCanvasHeight}
+                onChange={(e) => setResizeCanvasHeight(Number.parseInt(e.target.value) || 1)}
+                className="w-24 h-8"
+                min={1}
+                max={10000}
+              />
+              <span className="text-xs text-muted-foreground">px</span>
+            </div>
+            <div className="flex items-center gap-2">
+              <label className="text-sm font-medium">背景:</label>
+              <input
+                type="color"
+                value={resizeBackgroundColor}
+                onChange={(e) => setResizeBackgroundColor(e.target.value)}
+                disabled={resizeBackgroundTransparent}
+                className="w-12 h-8 rounded border cursor-pointer disabled:opacity-50"
+              />
+            </div>
+            <div className="flex items-center gap-2">
+              <label className="text-sm font-medium flex items-center gap-1">
+                <input
+                  type="checkbox"
+                  checked={resizeBackgroundTransparent}
+                  onChange={(e) => setResizeBackgroundTransparent(e.target.checked)}
+                  className="w-4 h-4"
+                />
+                透明
+              </label>
+            </div>
+            <div className="flex items-center gap-2 ml-auto">
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={handleResizeZoomOut}
+                title="缩小"
+                className="h-8 w-8 p-0"
               >
-                <div className="rounded-full bg-foreground" style={{ width: w + 2, height: w + 2 }} />
-              </button>
-            ))}
+                <ZoomOut className="h-4 w-4" />
+              </Button>
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={handleResizeZoomIn}
+                title="放大"
+                className="h-8 w-8 p-0"
+              >
+                <ZoomIn className="h-4 w-4" />
+              </Button>
+              <Button
+                variant="ghost"
+                size="sm"
+                onClick={() => {
+                  setIsResizeMode(false);
+                  setResizeImageScale(1);
+                  setResizeImagePosition({ x: 0, y: 0 });
+                }}
+              >
+                取消
+              </Button>
+              <Button
+                size="sm"
+                onClick={handleResizeConfirm}
+                className="bg-primary text-primary-foreground hover:bg-primary/90"
+              >
+                确认调整
+              </Button>
+            </div>
           </div>
-        </div>
+        ) : (
+          /* 非尺寸调整模式下显示图片标注工具栏 */
+          <div className="flex flex-wrap items-center justify-center gap-3 border-b px-4 py-2">
+            {/* 工具按钮 */}
+            <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
+              <button
+                type="button"
+                className={`rounded-md p-1.5 transition-colors ${tool === "pen" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
+                onClick={() => setTool("pen")}
+                title="画笔"
+              >
+                <Pencil className="h-4 w-4" />
+              </button>
+              <button
+                type="button"
+                className={`rounded-md p-1.5 transition-colors ${tool === "arrow" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
+                onClick={() => setTool("arrow")}
+                title="箭头"
+              >
+                <ArrowRight className="h-4 w-4" />
+              </button>
+              <button
+                type="button"
+                className={`rounded-md p-1.5 transition-colors ${tool === "circle" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
+                onClick={() => setTool("circle")}
+                title="圆圈"
+              >
+                <Circle className="h-4 w-4" />
+              </button>
+              <button
+                type="button"
+                className={`rounded-md p-1.5 transition-colors ${tool === "text" ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-muted-foreground/10 hover:text-foreground"}`}
+                onClick={() => setTool("text")}
+                title="文字"
+              >
+                <Type className="h-4 w-4" />
+              </button>
+            </div>
+
+            {/* 颜色选择 */}
+            <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
+              {COLORS.map((c) => (
+                <button
+                  key={c}
+                  type="button"
+                  className={`h-6 w-6 rounded-full border-2 transition-transform ${color === c ? "scale-110 border-primary" : "border-transparent hover:scale-105"}`}
+                  style={{ backgroundColor: c }}
+                  onClick={() => setColor(c)}
+                  title={c}
+                />
+              ))}
+            </div>
+
+            {/* 线宽选择 */}
+            <div className="flex items-center gap-1 rounded-lg bg-muted p-1">
+              {LINE_WIDTHS.map((w) => (
+                <button
+                  key={w}
+                  type="button"
+                  className={`flex h-7 w-7 items-center justify-center rounded-md transition-colors ${lineWidth === w ? "bg-primary/20" : "hover:bg-muted-foreground/10"}`}
+                  onClick={() => setLineWidth(w)}
+                  title={`线宽 ${w}px`}
+                >
+                  <div className="rounded-full bg-foreground" style={{ width: w + 2, height: w + 2 }} />
+                </button>
+              ))}
+            </div>
+          </div>
+        )}
 
         {/* 画布区域 - 并排显示原图和处理后的图片 */}
         <div ref={containerRef} className="flex flex-1 items-center justify-center gap-4 overflow-hidden bg-muted/30 p-4">
@@ -1050,101 +1146,50 @@ export function ImageAnnotator({ imageUrl, onConfirm, onCancel }: ImageAnnotator
               <span className="text-sm text-muted-foreground">正在加载图片...</span>
             </div>
           ) : isResizeMode ? (
-            /* 尺寸调整模式 */
-            <div className="flex flex-1 flex-col items-center justify-center gap-4 w-full h-full">
-              {/* 尺寸调整控制面板 */}
-              <div className="flex items-center gap-4 p-4 bg-muted/50 rounded-lg w-full max-w-2xl">
-                <div className="flex items-center gap-2">
-                  <label className="text-sm font-medium">宽度:</label>
-                  <Input
-                    type="number"
-                    value={resizeCanvasWidth}
-                    onChange={(e) => setResizeCanvasWidth(Number.parseInt(e.target.value) || 1)}
-                    className="w-24 h-8"
-                    min={1}
-                    max={10000}
-                  />
-                  <span className="text-xs text-muted-foreground">px</span>
-                </div>
-                <div className="flex items-center gap-2">
-                  <label className="text-sm font-medium">高度:</label>
-                  <Input
-                    type="number"
-                    value={resizeCanvasHeight}
-                    onChange={(e) => setResizeCanvasHeight(Number.parseInt(e.target.value) || 1)}
-                    className="w-24 h-8"
-                    min={1}
-                    max={10000}
-                  />
-                  <span className="text-xs text-muted-foreground">px</span>
-                </div>
-                <div className="flex items-center gap-2">
-                  <label className="text-sm font-medium">背景:</label>
-                  <input
-                    type="color"
-                    value={resizeBackgroundColor}
-                    onChange={(e) => setResizeBackgroundColor(e.target.value)}
-                    disabled={resizeBackgroundTransparent}
-                    className="w-12 h-8 rounded border cursor-pointer disabled:opacity-50"
-                  />
-                </div>
-                <div className="flex items-center gap-2">
-                  <label className="text-sm font-medium flex items-center gap-1">
-                    <input
-                      type="checkbox"
-                      checked={resizeBackgroundTransparent}
-                      onChange={(e) => setResizeBackgroundTransparent(e.target.checked)}
-                      className="w-4 h-4"
+            /* 尺寸调整模式 - 左右对比布局 */
+            <>
+              {/* 左侧：原图 */}
+              <div className="flex flex-1 flex-col border-2 border-dashed border-border rounded-lg bg-muted/20 p-4 overflow-hidden">
+                <div className="mb-2 text-sm font-medium text-muted-foreground text-center">原图</div>
+                <div className="flex-1 flex items-center justify-center overflow-auto">
+                  {image && (
+                    <img
+                      src={image.src}
+                      alt="原图"
+                      className="max-w-full max-h-full rounded-lg shadow-lg"
+                      style={{ objectFit: "contain" }}
                     />
-                    透明
-                  </label>
-                </div>
-                <div className="flex items-center gap-2 ml-auto">
-                  <Button
-                    variant="ghost"
-                    size="sm"
-                    onClick={() => {
-                      setIsResizeMode(false);
-                      setResizeImageScale(1);
-                      setResizeImagePosition({ x: 0, y: 0 });
-                    }}
-                  >
-                    取消
-                  </Button>
-                  <Button
-                    size="sm"
-                    onClick={handleResizeConfirm}
-                    className="bg-primary text-primary-foreground hover:bg-primary/90"
-                  >
-                    确认调整
-                  </Button>
+                  )}
                 </div>
               </div>
               
-              {/* 尺寸调整预览画布 */}
-              <div 
-                ref={resizeContainerRef}
-                className="flex-1 w-full max-w-4xl border-2 border-dashed border-primary/50 rounded-lg bg-muted/30 p-4 overflow-auto"
-                onWheel={handleResizeImageWheel}
-              >
-                <div className="relative inline-block">
-                  <canvas
-                    ref={resizeCanvasRef}
-                    className="cursor-move rounded-lg shadow-lg"
-                    onMouseDown={handleResizeImageDragStart}
-                    onMouseMove={handleResizeImageDrag}
-                    onMouseUp={handleResizeImageDragEnd}
-                    onMouseLeave={handleResizeImageDragEnd}
-                    onTouchStart={handleResizeImageDragStart}
-                    onTouchMove={handleResizeImageDrag}
-                    onTouchEnd={handleResizeImageDragEnd}
-                  />
-                  <div className="absolute top-2 left-2 bg-black/70 text-white text-xs px-2 py-1 rounded">
-                    画布: {resizeCanvasWidth} x {resizeCanvasHeight} | 缩放: {(resizeImageScale * 100).toFixed(0)}% | 拖拽移动图片，滚轮缩放
+              {/* 右侧：尺寸调整预览画布 */}
+              <div className="flex flex-1 flex-col border-2 border-dashed border-primary/50 rounded-lg bg-muted/30 p-4 overflow-hidden">
+                <div className="mb-2 text-sm font-medium text-muted-foreground text-center">调整尺寸</div>
+                <div 
+                  ref={resizeContainerRef}
+                  className="flex-1 flex items-center justify-center overflow-auto"
+                  onWheel={handleResizeImageWheel}
+                >
+                  <div className="relative inline-block">
+                    <canvas
+                      ref={resizeCanvasRef}
+                      className="cursor-move rounded-lg shadow-lg"
+                      onMouseDown={handleResizeImageDragStart}
+                      onMouseMove={handleResizeImageDrag}
+                      onMouseUp={handleResizeImageDragEnd}
+                      onMouseLeave={handleResizeImageDragEnd}
+                      onTouchStart={handleResizeImageDragStart}
+                      onTouchMove={handleResizeImageDrag}
+                      onTouchEnd={handleResizeImageDragEnd}
+                    />
+                    <div className="absolute top-2 left-2 bg-black/70 text-white text-xs px-2 py-1 rounded">
+                      画布: {resizeCanvasWidth} x {resizeCanvasHeight} | 缩放: {(resizeImageScale * 100).toFixed(0)}% | 拖拽移动图片，滚轮缩放
+                    </div>
                   </div>
                 </div>
               </div>
-            </div>
+            </>
           ) : (
             <>
               {/* 原图画布 */}