1. MemoryMiddleware: replace byte-length check (query.len() < 4) with
char-count check (query.chars().count() < 2). Single CJK characters
are 3 UTF-8 bytes but 1 meaningful character — the old threshold
incorrectly skipped 1-2 char Chinese queries like "你好".
2. QueryAnalyzer: add Chinese synonym mappings for 13 common technical
terms (错误→bug, 优化→improve, 配置→config, etc.) so CJK queries
can find relevant English-keyword memories and vice versa.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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