feat: 聊天历史和用户消息注入时间戳 - #132

Claude finished @lishuceo's task in 1m 16s —— View job

PR Review: feat: 聊天历史和用户消息注入时间戳

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✅ Approved

Clean, well-scoped PR. The timestamp injection approach is sound — adding time to the user prompt side rather than system prompt avoids cache misses while giving Claude temporal awareness.

What I reviewed:

• formatCreateTime — Manual UTC+8 offset is correct (China doesn't observe DST). Edge cases handled well: undefined, empty string, '0', NaN all return undefined. Date component comparisons using UTC methods after offset are correct.
• Data pipeline — createTime flows cleanly through parseMessage → handleMessageEvent → taskQueue.enqueue → processQueue → executeClaudeTask/executeDirectTask. No dropped or misrouted values.
• History formatting — Time prefix [HH:MM] role: text is clean and informative. Graceful degradation when createTime is absent (no prefix, same as before).
• <msg-time> tag — Injected at the end of user prompt, non-intrusive metadata pattern.
• Tests — 6 test cases cover same-day, zero-padding, cross-day, cross-year, and UTC+8 boundary scenarios. Good use of vi.useFakeTimers().
• Type changes — QueueTask.createTime and ParsedMessage.createTime are properly optional, backwards-compatible.

Minor observations (not blocking, confidence < 75):

• The enqueue() method now has 9 positional parameters. An options object pattern would improve readability, but that's a pre-existing issue this PR merely inherits — not a reason to block.
• The _testFormatCreateTime export pattern works fine for unit testing private functions.

No bugs, security issues, or architectural concerns found.