Roadmap Todos And Backlog Split

Goal

Split the editor-behavior roadmap into:

• todos: active approved work
• backlog: deferred items that need user approval before they re-enter the active queue

Decision

Move these items to approval-gated backlog:

• Lane 1: Toggle Rewrite
• Lane 5: Search / Find-Replace
• Lane 6: Collaboration / Editor-Only
• Lane 7: Streaming Follow-Up

Keep these as active todos:

• none

Current note:

• Lane 2, Lane 3, and Lane 4 are now historical closures in the canonical roadmap.

Constraint

Keep lane numbering stable so existing references do not break.