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diag(core): 丢弃记录带上差异文本 (#194) - #288
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This was referenced Oct 31, 2026
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内容
selection-discard.jsonl的每条记录补上实际差异文本：{"reason":"row-text-changed","row":0,"saved_bytes":11,"current_bytes":29, "saved_columns":54,"current_columns":54,"saved_text":"…","current_text":"…","t_ms":…}改动
experiments/core/text_selection.hppDiscardReport新增saved_text/current_text，在row-text-changed分支填入（各取前 48 字节）experiments/shell/shell.cpp\xNN）为什么
此前只能看到长度差（11→29 或 23→17），无法判断是"重绘写了半行"还是"内容真的换了"。#194 的修法选择（先排空 / 识别吸收）取决于这个区别：如果
current_text是saved_text的前缀，就是部分重绘；如果不是，则是内容替换。验证
termforge_shell构建通过；experiments.shell.test_selection_context→ 8 tests OK（skipped=1）。边界
Refs #194