feat: P0/P1 — Image, OCR, Translation tabs + styled headers on all tabs

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

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

fix: asyncio.get_running_loop() across backends; expand mesh/capability/model UI docs

fix: corpus dropdown, LLM error display, chat UX, invite endpoint, getting started text

feat: Phase 3 wired + plant tool + MoE bus + model distribution always-on

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

feat: HF Space shows real 7-tab node UI with SmolLM2 backend