Rewrite _THINKING_PROMPT with strict rules: 2-3 sentence limit,
anti-confabulation (only reference real data), anti-repetition.
- Add _pick_seed_type() with recent-type dedup (excludes last 3)
- Add _gather_system_snapshot() for real-time grounding (time, thought
count, chat activity, task queue)
- Improve _build_continuity_context() with anti-repetition header and
100-char truncation
- Fix journal + memory timestamps to include local timezone
- 12 new TDD tests covering all improvements
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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