修复确认导入的校验提示及身份重算 #2

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aerospaceboy wants to merge 4 commits from aerospaceboy/WiseGrade:fix/import-confirmation into main

Author	SHA1	Message	Date
aerospaceboy	eb8c545090	docs: record import confirmation fixes and validation	2026-10-14 15:22:21 +08:00
aerospaceboy	46c45baaa2	fix: validate import identities and selected materials consistently	2026-10-14 15:22:21 +08:00
aerospaceboy	1776b1b50c	fix: explain import blockers and recompute selected identities	2026-10-14 15:22:21 +08:00
aerospaceboy	0d6dc4b342	fix: expose per-file cover identities in import scans	2026-10-14 15:22:21 +08:00