Markdown visual enhancement and session workbench for DSH Web Composer: live syntax presentation with caret-row source reveal (inactive-line markers can be hidden or faded), deterministic local completions, and list/quote continuation on line break with ordered-list renumbering; long pastes fold into persistent chips with inline context or file-mode delivery (@path across 50+ extensions) plus sidebar LLM rewrites (stop, preview diff, undo/redo); real-time context map with token gauge, composition breakdown, per-turn growth chart with anchor lines, in-place /compact, turn forking, and a Context Doctor workspace (overview, diagnostics, analysis, feedback).