Standalone despair/suicide detection module with 4-tier classification:
- LOW: General sadness, stress, difficult times
- MEDIUM: Hopelessness, isolation, worthlessness
- HIGH: Active despair, mentions of death, feeling trapped
- CRITICAL: Explicit intent, plan, imminent self-harm
Returns structured response: {level, indicators, recommended_action}
CRITICAL recommended_action:
- Interrupt conversation immediately
- Ask 'Are you safe right now?'
- Provide 988 Suicide & Crisis Lifeline
- Provide Crisis Text Line (HOME to 741741)
- Stay present. Do not disconnect.
Designed to integrate with crisis/ module from PR #4.
Falls back to internal pattern engine when crisis/ unavailable.
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