feat: 完善经济性分析功能和优化界面显示

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- 新增工程运行期限、折现率、年损耗小时数参数配置
- 实现总费用计算功能（包含电缆投资NPV和电费损耗NPV）
- 修复total_investment函数调用时机问题，确保GUI模式正确计算
- 优化电缆单价显示为万元/km单位
- 总长度显示单位改为公里
- 方案对比结果新增总费用列，支持全生命周期成本比选
- 代码格式化和导入顺序优化
- 添加IFLOW.md项目上下文文档

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dmy

2026-01-06 15:09:52 +08:00

parent c54ad369a4

commit 61fa870778

4 changed files with 1334 additions and 656 deletions

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main.py

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