_sanitize_fts5_query() was stripping ALL double quotes (including
properly paired ones), breaking user-provided quoted phrases like
"exact phrase". Hyphenated terms like chat-send also silently
expanded to chat AND send, returning unexpected or zero results.
Fix:
1. Extract balanced quoted phrases into placeholders before
stripping FTS5-special characters, then restore them.
2. Wrap unquoted hyphenated terms (word-word) in double quotes so
FTS5 matches them as exact phrases instead of splitting on
the hyphen.
3. Unmatched quotes are still stripped as before.
Based on issue report by @bailob (#1770) and PR #1773 by @Jah-yee
(whose branch contained unrelated changes and couldn't be merged
directly).
Closes#1770Closes#1773
Co-authored-by: Jah-yee <Jah-yee@users.noreply.github.com>
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