Canvas/Story product split + URL routing (Tier 1)

Polish pass: fullscreen, ambient, controls grouping

Unify view transitions with a single .view-switch-in primitive

Extract visual craft into reusable primitives

Add Story Mode — single-concept reading view for the tour

Fix tour layout, synthesis reliability, and cache safety

fix: progress label shows tool call not THINK text during tour generation

feat: agentic Phase 2 + trace UI fix + token budget cuts

feat: agentic Phase 1 with real MCP tools + ReAct trace in UI

fix: tour quality — filter artifact stages + hollow insights + draggable cards

improve: tour quality + layout from Claude Code source study

fix: center loading state in explore view

feat: agent-based tour generation with live trace panel

improve: tour prompt forces pipeline-first thinking + flowing arrow animation

Cap Explore layout at 3 nodes per column to prevent tall stacking

Fix Explore "Start here" badge always using reading_order=1

fix: diagram header/tabs cramping on mobile

feat: mobile polish — touch scroll, pinch-zoom, responsive onboarding

fix: wheel zoom not working in ExploreView after data loads

fix: zoom toward cursor in diagram and explore views

fix: proportional scroll zoom in diagram and explore views

refactor: distinct type colors across the spectrum — each node type own hue

fix: unified chain glow color on hover — entire connected subgraph shares the source node's color

fix: consistent chain glow across all diagram views

fix(diagrams): strong hover glow on all diagram types — Architecture, Class, Explore

feat(ui): Blueprint Dark — complete color system rebuild

fix: persist diagrams and tour to localStorage to survive page refreshes

fix: commit missing modified files (diagram_service, generation, DiagramView, ExploreView)

Major feature: interactive diagrams, MCP integration, and bug fixes

checkpoint: pre-UI-overhaul state