diff --git a/components/canvas/AiWashWorkspace.tsx b/components/canvas/AiWashWorkspace.tsx
index 529bf4286..0ee22c1e7 100644
--- a/components/canvas/AiWashWorkspace.tsx
+++ b/components/canvas/AiWashWorkspace.tsx
@@ -988,69 +988,6 @@ export function AiWashWorkspace({
                   </div>
                 </div>
 
-                <Button
-                  className={cn(
-                    "h-12 w-full rounded-[20px] px-4 text-[15px] font-semibold",
-                    PRIMARY_ACTION_BUTTON_CLASS
-                  )}
-                  disabled={
-                    isSubmitting ||
-                    !compareSourceUrl ||
-                    enabledPresets.length === 0 ||
-                    (shouldShowUserModelSelector && !selectedUserModel)
-                  }
-                  onClick={handleSubmit}
-                  type="button"
-                >
-                  {isSubmitting ? (
-                    <Loader2 className="mr-2 h-4 w-4 animate-spin" />
-                  ) : (
-                    <Sparkles className="mr-2 h-4 w-4" />
-                  )}
-                  {isSubmitting
-                    ? "正在洗图"
-                    : totalEstimatedCost > 0
-                      ? `开始 AI洗图 · ${totalEstimatedCost} 积分`
-                      : "开始 AI洗图"}
-                </Button>
-              </div>
-
-              <div className={cn(SUBTLE_PANEL_CLASS, "space-y-3 p-3.5")}>
-                <div className="flex items-center justify-between">
-                  <div className="text-[15px] font-semibold text-[#111111]">
-                    上传底图
-                  </div>
-                  <Button
-                    className={cn(
-                      "h-9 rounded-full px-3 text-xs font-medium",
-                      SECONDARY_ACTION_BUTTON_CLASS
-                    )}
-                    onClick={() => onRequestAddImage?.()}
-                    size="sm"
-                    type="button"
-                    variant="outline"
-                  >
-                    <Upload className="mr-1.5 h-3.5 w-3.5" />
-                    {compareSourceUrl ? "更换图片" : "选择图片"}
-                  </Button>
-                </div>
-                {compareSourceUrl ? (
-                  <div className="overflow-hidden rounded-[18px] border border-[#ececec] bg-white">
-                    <img
-                      alt="AI洗图底图"
-                      className="aspect-[16/10] w-full object-cover"
-                      src={getDisplayImageUrl(compareSourceUrl, 720)}
-                    />
-                  </div>
-                ) : (
-                  <button
-                    className="flex aspect-[16/10] w-full items-center justify-center rounded-[18px] border border-dashed border-[#d9d9d9] bg-white text-center text-sm text-[#8a8a8a] transition hover:border-[#111111] hover:text-[#111111]"
-                    onClick={() => onRequestAddImage?.()}
-                    type="button"
-                  >
-                    先上传一张底图
-                  </button>
-                )}
               </div>
 
               <div className={cn(SUBTLE_PANEL_CLASS, "space-y-2 p-3.5")}>
@@ -1247,49 +1184,27 @@ export function AiWashWorkspace({
           </div>
         </aside>
 
-        <main className="flex min-w-0 flex-1 flex-col overflow-hidden px-6 pb-6 pt-6">
+        <main className="flex min-w-0 flex-1 flex-col gap-3 overflow-hidden px-6 pb-6 pt-6">
           <section
             className={cn(
               PANEL_CLASS,
-              "flex min-h-0 flex-1 flex-col overflow-hidden p-4"
+              "flex min-h-0 flex-1 flex-col overflow-hidden p-3"
             )}
           >
-            <div className="mb-4 flex flex-wrap items-start justify-between gap-3">
-              <div className="min-w-0">
-                <div className="flex flex-wrap items-center gap-2">
-                  <div className="text-[24px] font-semibold leading-tight text-[#111111]">
-                    {selectedPreviewResult?.title || "AI洗图结果预览"}
-                  </div>
-                  <span className="rounded-full border border-[#ebebeb] bg-[#fafafa] px-3 py-1 text-xs text-[#666666]">
-                    {getAiWashStatusLabel(selectedPreviewResult?.status)}
-                  </span>
-                </div>
-                <div className="mt-1 max-w-3xl text-sm leading-6 text-[#666666]">
-                  {selectedPreviewResult?.description ||
-                    "左侧选择渲染目标后，所有洗图结果都会共用这里的大尺寸预览区。"}
-                </div>
-              </div>
-              <div className="flex flex-wrap items-center gap-2 text-xs text-[#666666]">
-                {selectedPreviewResult?.modelId ? (
-                  <span className="rounded-full border border-[#ebebeb] bg-[#fafafa] px-3 py-1.5">
-                    {selectedPreviewResult.modelId}
-                  </span>
-                ) : null}
-                {selectedPreviewResult?.createdAt ? (
-                  <span className="rounded-full border border-[#ebebeb] bg-[#fafafa] px-3 py-1.5">
-                    {new Date(selectedPreviewResult.createdAt).toLocaleTimeString(
-                      "zh-CN",
-                      {
-                        hour: "2-digit",
-                        minute: "2-digit",
-                      }
-                    )}
-                  </span>
-                ) : null}
-              </div>
-            </div>
-
-            <div className="relative min-h-[560px] flex-1 overflow-hidden rounded-[28px] border border-[#e9e9e9] bg-[radial-gradient(circle_at_50%_0%,#ffffff_0%,#f8f8f8_52%,#f2f2f2_100%)]">
+            <div className="relative min-h-0 flex-1 overflow-hidden rounded-[28px] border border-[#e9e9e9] bg-[radial-gradient(circle_at_50%_0%,#ffffff_0%,#f8f8f8_52%,#f2f2f2_100%)]">
+              {compareSourceUrl ? (
+                <button
+                  className={cn(
+                    "absolute right-4 top-4 z-20 inline-flex h-10 items-center rounded-full px-4 text-sm font-medium",
+                    SECONDARY_ACTION_BUTTON_CLASS
+                  )}
+                  onClick={() => onRequestAddImage?.()}
+                  type="button"
+                >
+                  <Upload className="mr-2 h-4 w-4" />
+                  更换图片
+                </button>
+              ) : null}
               {selectedPreviewResult ? (
                 previewHasImage ? (
                   <>
@@ -1359,54 +1274,96 @@ export function AiWashWorkspace({
                       </>
                     ) : null}
                   </>
+                ) : compareSourceUrl ? (
+                  <>
+                    <img
+                      alt="AI洗图底图"
+                      className="absolute inset-0 h-full w-full object-contain"
+                      src={getDisplayImageUrl(compareSourceUrl, 1800)}
+                    />
+                    <div className="pointer-events-none absolute left-4 top-4 rounded-full bg-black/65 px-3 py-1.5 text-[11px] text-white">
+                      原图
+                    </div>
+                    {(selectedPreviewResult.status === "running" ||
+                      selectedPreviewResult.status === "submitting" ||
+                      selectedPreviewResult.status === "failed") ? (
+                      <div className="absolute inset-0 flex items-center justify-center bg-white/58 px-6 text-center backdrop-blur-[1px]">
+                        <div className="max-w-sm rounded-[24px] border border-[#ececec] bg-white/92 px-6 py-5 shadow-[0_18px_40px_rgba(0,0,0,0.08)]">
+                          {selectedPreviewResult.status === "running" ||
+                          selectedPreviewResult.status === "submitting" ? (
+                            <>
+                              <Loader2 className="mx-auto mb-3 h-8 w-8 animate-spin text-[#666666]" />
+                              <div className="text-base font-medium text-[#111111]">
+                                {selectedPreviewResult.status === "submitting"
+                                  ? "正在提交模型任务"
+                                  : "模型正在生成结果"}
+                              </div>
+                              <div className="mt-2 text-sm leading-6 text-[#777777]">
+                                结果完成后会在同一区域切换为可拖动对比图。
+                              </div>
+                            </>
+                          ) : (
+                            <>
+                              <div className="text-base font-medium text-[#9b2c2c]">
+                                该目标生成失败
+                              </div>
+                              <div className="mt-2 text-sm leading-6 text-[#9b2c2c]">
+                                {selectedPreviewResult.error || "请调整配置后重新生成。"}
+                              </div>
+                            </>
+                          )}
+                        </div>
+                      </div>
+                    ) : (
+                      <div className="pointer-events-none absolute bottom-5 left-1/2 -translate-x-1/2 rounded-full border border-[#e5e5e5] bg-white/92 px-4 py-2 text-xs text-[#666666] shadow-[0_12px_24px_rgba(0,0,0,0.06)]">
+                        原图已就绪，点击下方开始 AI洗图
+                      </div>
+                    )}
+                  </>
                 ) : (
                   <div className="absolute inset-0 flex items-center justify-center px-6 text-center">
-                    <div className="max-w-sm">
-                      {selectedPreviewResult.status === "running" ||
-                      selectedPreviewResult.status === "submitting" ? (
-                        <>
-                          <Loader2 className="mx-auto mb-4 h-9 w-9 animate-spin text-[#666666]" />
-                          <div className="text-base font-medium text-[#111111]">
-                            {selectedPreviewResult.status === "submitting"
-                              ? "正在提交模型任务"
-                              : "模型正在生成结果"}
-                          </div>
-                          <div className="mt-2 text-sm leading-6 text-[#777777]">
-                            生成完成后，这里会自动切换为大图对比预览。
-                          </div>
-                        </>
-                      ) : selectedPreviewResult.status === "failed" ? (
-                        <>
-                          <div className="text-base font-medium text-[#9b2c2c]">
-                            该目标生成失败
-                          </div>
-                          <div className="mt-2 text-sm leading-6 text-[#9b2c2c]">
-                            {selectedPreviewResult.error || "请调整配置后重新生成。"}
-                          </div>
-                        </>
-                      ) : (
-                        <>
-                          <ImageIcon className="mx-auto mb-4 h-10 w-10 text-[#b2b2b2]" />
-                          <div className="text-base font-medium text-[#111111]">
-                            固定单图预览区
-                          </div>
-                          <div className="mt-2 text-sm leading-6 text-[#777777]">
-                            先上传底图并点击开始 AI洗图，结果会在这里完整展示。
-                          </div>
-                        </>
-                      )}
+                    <div>
+                      <button
+                        className="inline-flex h-16 items-center rounded-[26px] bg-[#111111] px-10 text-[18px] font-semibold text-white shadow-[0_18px_40px_rgba(0,0,0,0.16)] transition hover:bg-black"
+                        onClick={() => onRequestAddImage?.()}
+                        type="button"
+                      >
+                        <ImageIcon className="mr-3 h-5 w-5" />
+                        添加图片
+                      </button>
+                      <div className="mt-4 text-sm text-[#777777]">
+                        选择本地图后即可开始 AI洗图
+                      </div>
                     </div>
                   </div>
                 )
+              ) : compareSourceUrl ? (
+                <>
+                  <img
+                    alt="AI洗图底图"
+                    className="absolute inset-0 h-full w-full object-contain"
+                    src={getDisplayImageUrl(compareSourceUrl, 1800)}
+                  />
+                  <div className="pointer-events-none absolute left-4 top-4 rounded-full bg-black/65 px-3 py-1.5 text-[11px] text-white">
+                    原图
+                  </div>
+                  <div className="pointer-events-none absolute bottom-5 left-1/2 -translate-x-1/2 rounded-full border border-[#e5e5e5] bg-white/92 px-4 py-2 text-xs text-[#666666] shadow-[0_12px_24px_rgba(0,0,0,0.06)]">
+                    原图已就绪，点击下方开始 AI洗图
+                  </div>
+                </>
               ) : (
                 <div className="absolute inset-0 flex items-center justify-center px-6 text-center">
                   <div>
-                    <Sparkles className="mx-auto mb-4 h-10 w-10 text-[#9a9a9a]" />
-                    <div className="text-base font-medium text-[#111111]">
-                      AI洗图准备就绪
-                    </div>
-                    <div className="mt-2 text-sm text-[#777777]">
-                      管理员配置预设后，这里会展示共享结果预览。
+                    <button
+                      className="inline-flex h-16 items-center rounded-[26px] bg-[#111111] px-10 text-[18px] font-semibold text-white shadow-[0_18px_40px_rgba(0,0,0,0.16)] transition hover:bg-black"
+                      onClick={() => onRequestAddImage?.()}
+                      type="button"
+                    >
+                      <ImageIcon className="mr-3 h-5 w-5" />
+                      添加图片
+                    </button>
+                    <div className="mt-4 text-sm text-[#777777]">
+                      选择本地图后即可开始 AI洗图
                     </div>
                   </div>
                 </div>
@@ -1414,30 +1371,61 @@ export function AiWashWorkspace({
             </div>
           </section>
 
-          <div className="mt-5 flex flex-wrap items-center justify-between gap-3">
+          <div className="flex flex-wrap items-center justify-between gap-3">
             <div className="rounded-full border border-[#e5e5e5] bg-white px-4 py-2 text-xs text-[#666666] shadow-[0_0_0_1px_rgba(0,0,0,0.02),0_10px_20px_rgba(0,0,0,0.03)]">
               {selectedResult
                 ? `已选中 ${selectedResult.title}，可直接发送回画布`
                 : selectedPreviewResult
-                  ? `当前预览 ${selectedPreviewResult.title}，生成完成后可发送回画布`
-                  : "请选择或生成一张洗图结果"}
+                  ? compareSourceUrl
+                    ? `当前目标 ${selectedPreviewResult.title}，生成完成后可发送回画布`
+                    : "请先添加一张底图"
+                  : compareSourceUrl
+                    ? "原图已上传，点击开始 AI洗图生成结果"
+                    : "请先添加一张底图"}
+            </div>
+            <div className="flex flex-wrap items-center gap-2">
+              <Button
+                className={cn(
+                  "h-11 rounded-[18px] px-5 text-sm font-semibold",
+                  PRIMARY_ACTION_BUTTON_CLASS
+                )}
+                disabled={
+                  isSubmitting ||
+                  !compareSourceUrl ||
+                  enabledPresets.length === 0 ||
+                  (shouldShowUserModelSelector && !selectedUserModel)
+                }
+                onClick={handleSubmit}
+                type="button"
+              >
+                {isSubmitting ? (
+                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                ) : (
+                  <Sparkles className="mr-2 h-4 w-4" />
+                )}
+                {isSubmitting
+                  ? "正在洗图"
+                  : totalEstimatedCost > 0
+                    ? `开始 AI洗图 · ${totalEstimatedCost} 积分`
+                    : "开始 AI洗图"}
+              </Button>
+              <Button
+                className={cn(
+                  "h-11 rounded-[18px] px-5 text-sm font-medium",
+                  SECONDARY_ACTION_BUTTON_CLASS
+                )}
+                disabled={!selectedResult?.imageUrl}
+                onClick={handleApply}
+                type="button"
+                variant="outline"
+              >
+                <Send className="mr-2 h-4 w-4" />
+                发送到画布
+              </Button>
             </div>
-            <Button
-              className={cn(
-                "h-11 rounded-[18px] px-5 text-sm font-medium",
-                SECONDARY_ACTION_BUTTON_CLASS
-              )}
-              disabled={!selectedResult?.imageUrl}
-              onClick={handleApply}
-              type="button"
-              variant="outline"
-            >
-              <Send className="mr-2 h-4 w-4" />
-              发送到画布
-            </Button>
           </div>
 
-          <div className={cn(PANEL_CLASS, "mt-4 overflow-hidden p-3")}>
+          <div className={cn(PANEL_CLASS, "overflow-hidden p-3")}>
             <button
               className="flex w-full items-center justify-between gap-3 rounded-[22px] px-1 py-1 text-left transition hover:bg-[#fafafa]"
               onClick={() => setIsHistoryExpanded((current) => !current)}