提交1 bmad搭建与项目启动 - ok

docs/stories/story-2-6-对比分析.md

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+# 故事 2.6: Comparative Analysis - 现有系统增强
+
+## 用户故事
+**作为** farm manager, **我想要** compare data from different lands or time periods, **以便** I can discover changing trends and optimization opportunities。
+
+## 故事上下文
+
+**现有系统集成:**
+- **集成于:** Existing land data, historical records, and agricultural analysis systems
+- **技术栈:** React 19 + data comparison algorithms + visualization libraries + report generation
+- **遵循模式:** Modern comparative analysis with multi-dimensional data comparison and trend analysis
+- **接触点:** Data comparison, chart analysis, report generation, time-based analysis
+
+**变更范围:**
+此增强功能 在保持兼容性的同时，实现... with existing land data and historical records.
+
+## 验收标准
+
+**功能需求:**
+1. 实现...，具有...