feat: 15 targeted improvements — RAG persistence, bus failover, agent hardening, deps sync

feat(rag): docs ingestion + UI/bus enhancements (P3 continuation)

fix(chat): wire ChatService with bus in app.py so cross-node sends deliver

fix(relay): register hub node directly via /manifest, even when absent from roster

fix(relay): route hub node via direct HTTP to fix cross-event-loop chat delivery

feat: relay hub serves in-process node directly so Space answers relay RPCs

fix: Python 3.10 compat — replace datetime.UTC with timezone.utc shim

Add all-to-all internet mesh over relay hub (P1-P3) + user-story screenshot proof

Quality improvements: Unicode chars, Token class, imports, type hints, formatting

fix: complete easter egg rewrite using Gradio 6 js= API

Fix: Additional ruff auto-fixes (30 issues fixed)

fix: re-apply Python 3.10 UTC fixes across all 10 files

Fix: Ruff linting issues - SIM/E402/F401 violations

fix: re-apply Python 3.10 UTC compatibility (was reverted by formatter)

fix: easter-egg ticker now properly works in Gradio app

fix: Python 3.10 compatibility - replace UTC import with timezone.utc

feat: WebLLM browser agent with PeerJS mesh, HybridRAG, news signals, and easter-egg ticker

feat: federated RAG + comprehensive security fixes

fix: Python 3.10 compatibility for HF Space (Python 3.10 env)

feat: impl_ref §22 gap-fill — all missing symbols implemented

feat: X01/X02/X06/X09/M02/M22 wiring + conformance suite + mobile PWA + 22 new tests

fix: 0 test failures; FileService; real RagService; emergency probe; chat return

feat: impl_ref gaps closed — Nemotron/OpenBMB backends, spec refs, extended UI, HOWTO, multi-node E2E

feat: Phase 2 (M14-M25, X05-X07) + Phase 3 experimental (M26-M31) + E2E tests + docs

feat: implement all M01-M13, X01-X04 modules + quality gate fixes