Backend:
- Add DecisionManager with state machine (INIT→ANALYZING→READY→EXECUTING)
- Implement Expert System rules engine (100% local, never fails)
- Dual-engine: LLM (primary) + Expert System (fallback)
- Auto-generate decision_token for each incident
- 30-second timeout guarantee
Frontend:
- Use decision.state to unlock [Y/n] buttons
- Display AI action suggestion in card
- Show source indicator [AI] or [EXP]
- Generate proposal on-demand if needed
Fixes: UI locked with hourglass when LLM times out
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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