feat: 项目框架，全局空间处理

lib/pages/widgets/common_bg_page.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:skywood/utils/tools/help_img.dart';
+
+class CommonBgPage extends StatelessWidget {
+
+  const CommonBgPage({
+    super.key,
+    this.child,
+
+  });
+
+  final Widget? child;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Stack(
+        children: [
+          SizedBox(
+            width: double.infinity,
+            height: double.infinity,
+            child: HelpImg.asset(ConstImg.homeBg, fit: BoxFit.fill),
+          ),
+          child ?? SizedBox()
+        ],
+      ),
+    );
+  }
+}