fix: eliminate duplicate events and AttributeError crash in demo runner

docs: audit, HF Spaces fix, and deep inline walkthrough comments

feat: demo enhancements — per-role routing, HITL end-to-end, cleaner timeline

fix: revert max_new_tokens, improve error display, forbid comments in generated code

fix: increase token budget for long tasks and show all 4 example buttons

fix: guard event stream against non-dict items from parallel reducer

feat: switch to Claude API (Haiku 4.5), production-only mode, parallel spec+solution

feat: add HuggingFace persistent cross-session memory (hf_memory_sync)

chore: fix lint warnings (ruff --fix)

Phase 4 upgrades: fixes 10, 16, 18, 19

Phase 3 upgrades: fixes 6, 8, 14, 15, 17

Phase 2 upgrades: fixes 5, 7, 9, 12, 13

Phase 1 upgrades: fixes 1, 2, 3, 4, 11

Fix JSON parse failure: raise token limits and add truncation salvage

Implement complete Self-Healing Code Agent framework