M1 Visual ASQL mode in cloud chart editor

Problem

Implement SQL/Visual query mode in cloud chart editor, integrating Visual ASQL alongside existing CodeMirror SQL mode. Use ai_notes/suite/features/VISUAL_ASQL_CHART_EDITOR_INTEGRATION_PLAN.md as execution spec and deliver phased rollout behind feature flag.

Context

Possible Solutions

Plan

Implementation Progress

QA Exploration

• QA exploration completed (or N/A for non-UI tasks)

Review Feedback

• Review cleared