#20241: fix(memory-lancedb): consolidate preference keyword/category detection (EN+CS+CJK)

## Summary\n- align preference category detection with capture triggers\n- include CJK capture trigger coverage (e.g. 偏好/喜欢/习惯/通常/会)\n- include CJK category detection for preference/decision/entity/fact while preserving EN+CS keywords\n- consolidate follow-up logic from prior split PRs into one branch\n\n## Validation\n- RUN v4.0.18 /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream ✓ extensions/memory-lancedb/index.test.ts (12 tests | 1 skipped) 3028ms ✓ memory plugin registers and initializes correctly 3020ms Test Files 1 passed (1) Tests 11 passed | 1 skipped (12) Start at 01:55:32 Duration 5.14s (transform 372ms, setup 532ms, import 53ms, tests 3.03s, environment 0ms)\n- > openclaw@2026.2.18 protocol:gen /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream > node --import tsx scripts/protocol-gen.ts wrote /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream/dist/protocol.schema.json\n- > openclaw@2026.2.18 protocol:gen:swift /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream > node --import tsx scripts/protocol-gen-swift.ts wrote /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream/apps/macos/Sources/OpenClawProtocol/GatewayModels.swift wrote /mnt/d/codex_openai/openclaw_codex/.tmp/openclaw_upstream/apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift\n- <!-- greptile_comment --> <h3>Greptile Summary</h3> This PR consolidates preference keyword and category detection in the `memory-lancedb` extension to support CJK (Chinese) text alongside existing English and Czech patterns. It adds CJK memory capture triggers, expands the English preference regex with additional keywords (`need`, `always`, `never`, `important`, `preferuji`, `nechci`), and introduces CJK-specific branches in `detectCategory` for preference, decision, entity, and fact categories. A thoughtful guard against broad CJK copulas in questions is also included. - Adds 5 new CJK regex patterns to `MEMORY_TRIGGERS` for capture detection - Expands `detectCategory` with CJK branches for all categories and broader EN preference keywords - Adds a question-mark guard to avoid misclassifying CJK questions as facts - **Bug: duplicate CJK preference regex block** at lines 278-280 in `index.ts` — identical to lines 275-277, making it dead code - Good test coverage added for all new CJK paths and expanded EN keywords <h3>Confidence Score: 4/5</h3> - This PR is safe to merge after removing the duplicate code block; no behavioral risk otherwise. - The changes are additive regex patterns for CJK support with no risk to existing EN/CS behavior. The only issue is a copy-paste duplicate block that is harmless dead code but should be cleaned up. Tests pass and cover all new branches. - `extensions/memory-lancedb/index.ts` has a duplicate CJK preference block (lines 278-280) that should be removed. _{Last reviewed commit: 25185e4} <!-- greptile_other_comments_section --> <!-- /greptile_comment -->