Improve streaming markdown rendering

Replace regex markdown renderer with react-markdown + remark-gfm

Extract streaming render to a tested module; buffer open code fences

Hide a table's header row until its separator arrives

Render streaming line by line so markdown syntax never shows

Reapply "Render streaming markdown block by block (kills the mid-stream snap)"

Reapply "Stream raw markdown like a chat assistant (drop the JSON envelope)"

Revert "Stream raw markdown like a chat assistant (drop the JSON envelope)"

Revert "Render streaming markdown block by block (kills the mid-stream snap)"

Render streaming markdown block by block (kills the mid-stream snap)

Stream raw markdown like a chat assistant (drop the JSON envelope)

Fix all cache/staleness issues from UCB liveness audit; chat chip shows LIVE selected-strategy score

Clarify bandit selection score labels

Self-hosted TinyLlama-1.1B LLM backend + disable topic in bandit key

Show both reward axes (explicit content / inferred format) in the UI

Trim signal catalog to exactly the vg_mvp_v1.0 set (9 signals)

Show applied reward on previous answers in chat UI

Surface round-robin picks in UI (was always showing ucb 0.00)

NVIDIA NIM LLM backend, vg reward model + round-robin/UCB selection, UI fixes

Wire missing UI signals: regenerate button + session_abandon beacon

Initial commit — APE Modulor for HF Spaces deploy