feat: 词库扩充 groups 39-105 (新增 1278 词)

- 删除原 groups 39-52 旧数据 (234 词)
- 导入 groups 39-105 新数据 (1278 词, 来源 /home/tools/words_insert_39_105.sql)
- 词库总数: 808 -> 1852, 覆盖 Group 1-105
- picture_id 沿用 = groupid 约定, 引用均指向已存在 pictures
- 备份: bcd.db.bak_pre-major-change_20260729_221405

diff --git a/backend/db/bcd.db b/backend/db/bcd.db
index fa6c8538771c2f35755ddacec40379855a75f74c..bdcc4858d51e3f92d7b7f6f60e67ca9314d5ea06 100644 (file)
Binary files a/backend/db/bcd.db and b/backend/db/bcd.db differ