A double-click selection can carry trailing whitespace and most imported
dictionaries store headwords lowercased, so an exact match on the raw
selection often misses (e.g. `Hello` or `world ` fail to resolve
`hello`/`world`). Case-sensitive formats like mdict are hit hardest since
their reader compares the raw word.
Seed the lookup history with a trimmed word and try ordered query
variants (trimmed, lowercase, title-case, uppercase) per provider,
keeping the first hit. Closes#4176.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Huang Xin
8dfc0e945e