fix: correct doubled import paths in App.tsx after refactor

refactor: organize components into feature-based subdirectories

fix: zoom indicator no longer overlaps the lock button (#1)

feat: GitHub promotion — star CTA, export attribution, social sharing

style: custom scrollbars matching the dark theme

security: harden input validation, storage limits, and security headers

fix: auto-layout now preserves parallel branch structure

feat: advanced multi-branch preset templates with parallel tracks

feat: intuitive edge disconnect — right-click edges, connection panel, disconnect all

feat: multi-node selection with bulk actions

fix: tutorial now advances through all steps correctly

fix: tutorial progress now advances correctly through all 5 steps

feat: redesign onboarding with welcome screen, interactive tutorial, and docs

feat: onboarding tour, node collapse, zoom indicator, auto-connect, new skills

feat: workflow manager, connection validation, README with live demo