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_5.part.js

@@ -1,15 +1,15 @@
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+v.r=A.bhC(u)
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-bgh(d,e){var y
+bgi(d,e){var y
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@@ -23,7 +23,7 @@ break A}if("input.selectAll"===e){y="\u1201\u1209\u1295\u121d \u12ed\u121d\u1228
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-bhB(d){return new A.aNr(d)},
+bhC(d){return new A.aNr(d)},
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