Show friendly pipeline readiness results

[rotatedcoded]

Improves Create/Update Persona result UX.

• Classifies needs_more_evidence as a playable safe outcome
• Shows friendly messaging for persona-ready/statistical-fallback states
• Keeps runtime-ready messaging for advanced ML ready states
• Avoids presenting Quick/low-evidence release gate blocks as crashes
• Preserves strict failure behavior when no playable persona is produced

Validation:

• python -m pytest tests/test_ui_unified_persona_pipeline.py passed
• python -m pytest tests/test_runtime_readiness.py passed
• python -m pytest tests/test_main_ui_elite_recommendation.py passed