将无限画布品牌logo移动到左上角入口

app/canvas/[id]/page.tsx

@@ -479,6 +479,31 @@ export default function CanvasEditorPage({ params }: PageProps) {
            <CanvasWorkspace />
         </div>
 
+        {/* Brand Entry (Top Left) */}
+        <div className="absolute top-4 left-4 z-20">
+          <Tooltip>
+            <TooltipTrigger asChild>
+              <Button
+                variant="ghost"
+                onClick={() => router.push("/")}
+                className="h-14 w-14 rounded-2xl border bg-background/85 p-0 shadow-sm backdrop-blur-md hover:bg-background"
+              >
+                {(siteSettingsData?.siteLogo || siteSettingsData?.siteLogoDark) ? (
+                  <img
+                    src={siteSettingsData?.siteLogo || siteSettingsData?.siteLogoDark || ""}
+                    alt={siteSettingsData?.siteName || "返回首页"}
+                    className="h-7 w-7 object-contain"
+                    draggable={false}
+                  />
+                ) : (
+                  <Grid3X3 className="h-5 w-5" />
+                )}
+              </Button>
+            </TooltipTrigger>
+            <TooltipContent>返回首页</TooltipContent>
+          </Tooltip>
+        </div>
+
         {/* 2. Floating Header (Top Left) */}
         <div className="absolute top-4 left-[5.5rem] z-20 flex items-center gap-2 bg-background/80 backdrop-blur-md border rounded-xl p-1.5 shadow-sm">
            <Tooltip>
@@ -576,33 +601,6 @@ export default function CanvasEditorPage({ params }: PageProps) {
         {/* 5. Floating Bottom Toolbar (Left) */}
         <div className="absolute left-4 top-1/2 -translate-y-1/2 z-20">
            <div className="flex flex-col items-center gap-2 p-1.5 rounded-2xl border bg-background/80 backdrop-blur-md shadow-2xl">
-              <Tooltip>
-                <TooltipTrigger asChild>
-                  <Button
-                    variant="ghost"
-                    onClick={() => router.push("/")}
-                    className="h-auto w-12 rounded-xl px-1.5 py-1.5 flex flex-col items-center gap-1"
-                  >
-                    {(siteSettingsData?.siteLogo || siteSettingsData?.siteLogoDark) ? (
-                      <img
-                        src={siteSettingsData?.siteLogo || siteSettingsData?.siteLogoDark || ""}
-                        alt={siteSettingsData?.siteName || "返回首页"}
-                        className="h-5 w-5 object-contain"
-                        draggable={false}
-                      />
-                    ) : (
-                      <Grid3X3 className="h-4 w-4" />
-                    )}
-                    <span className="max-w-[44px] truncate text-[10px] leading-tight text-muted-foreground">
-                      {siteSettingsData?.siteName || "首页"}
-                    </span>
-                  </Button>
-                </TooltipTrigger>
-                <TooltipContent side="right">返回首页</TooltipContent>
-              </Tooltip>
-
-              <Separator orientation="horizontal" className="w-5 my-0.5" />
-
               {/* Tools: Select, Pan, Add Text, Add Image, Add Video */}
               <Tooltip>
                 <TooltipTrigger asChild>