build: 构建生产版本

**前端构建:**
- Flutter Web 构建产物 (build/web)
- 包含主题修复和绿色对比度优化

**后端修改:**
- 添加 MyBatisPlusMetaObjectHandler (自动填充字段)
- 更新实体类、DTO、Controller
- 优化 Jackson 配置
- 更新 application-dev.yml

**构建信息:**
- Maven: monisuo-1.0.jar (41MB)
- Flutter: build/web (22.9s)
- 环境: prod

flutter_monisuo/build/web/main.dart.js_66.part.js

@@ -1,15 +1,15 @@
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+aYz(d,e,f){var y,x,w=null,v=new B.X(),u=new B.X()
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+v.r=A.bh_(u)
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-bfF(d,e){var y
+bfG(d,e){var y
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@@ -23,7 +23,7 @@ break A}if("input.selectAll"===e){y="\u0411\u0430\u0440\u043b\u044b\u0493\u044b\
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-bgZ(d){return new A.aMP(d)},
+bh_(d){return new A.aMP(d)},
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@@ -37,7 +37,7 @@ A=a.updateHolder(c[40],A)
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+(a=>{a["8c5T4HJVrY93Sy9CN99+YNgcVYY="]=a.current})($__dart_deferred_initializers__);