Refactor visual designer: improve folder structure, bundling, and dev tooling#19025
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- Extract ELK layout into features/layout with custom hooks (useAutoLayout, useResetLayout, useComputeLayout) - Lazy-load ELK via dynamic import() for bundle optimization - Move deployment graph handling into features/messaging - Move node renderers into features/visualization - Add graph-engine barrel export (features/graph-engine/index.ts) - Extract useFitView into graph-engine/hooks - Convert elk-layout from Store type to Jotai Getter/Setter - Rename useTheme.ts to use-theme.ts (kebab-case convention)
- Encapsulate DevToolbar and FakeMessageChannel in features/devtools - Add loadDevAppShell() with lazy loading and import.meta.env.DEV guard - Move GraphControlBar to src/components (shared, not feature-specific) - Simplify App.tsx: DevAppShell wrapper pattern, cleaner imports - Add Vite previewMock plugin for local production build testing - Import webview-playground from index.tsx (dev-only, tree-shaken) - Clean index.html (remove all dev/test scripts) - Add vite-env.d.ts for import.meta.env types - Update font-family fallback to match VS Code defaults - Add html-to-image dependency for future export feature
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Test this change out locally with the following install scripts (Action run 22161039354) VSCode
Azure CLI
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majastrz
approved these changes
Feb 18, 2026
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Refactoring of the visual designer app to improve code organization and bundle performance. No behavioral changes.
Changes
Feature module restructuring
features/layoutwith custom hooks (useAutoLayout,useResetLayout,useComputeLayout)features/messagingfeatures/visualizationfeatures/graph-engineuseFitViewinto graph-engine hooksBundle optimization
import()— main bundle drops from ~1,880 kB to ~385 kBStoretype to JotaiGetter/Setterfor idiomatic usageDev tooling improvements
features/devtoolswithloadDevAppShell()(lazy-loaded, tree-shaken in prod viaimport.meta.env.DEV)GraphControlBartosrc/components(shared, not feature-specific)previewMockplugin for local production build testingindex.html(remove all dev/test scripts)vite-env.d.tsforimport.meta.envtypesMicrosoft Reviewers: Open in CodeFlow