Revert "Switch streaming to a cumulative snapshot protocol"

Switch streaming to a cumulative snapshot protocol

Keep streamed answer on screen while canonical history loads

Batch streaming repaints with requestAnimationFrame

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)

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

Fix user-id switching in the chat sidebar

Fix memory leaks: abort SSE on unmount, close stream on disconnect

Add admin-token auth, security/streaming tests, DB design doc

Wire missing UI signals: regenerate button + session_abandon beacon

Initial commit — APE Modulor for HF Spaces deploy