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feat(FN-4411): complete Step 8 — document FileEditor CodeMirror architecture

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Fusion-Task-Id: FN-4411
Fusion-Task-Lineage: d90785f2-b828-4fa0-b330-ede7f3c14349
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Fusion
2026-05-14 02:23:02 -07:00
committed by gsxdsm
parent 52216568b4
commit 8e4f727cab
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AGENTS.md
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@@ -689,6 +689,10 @@ They are loaded in `App.tsx` / `AppModals.tsx` / `SettingsModal.tsx` / `AgentsVi
A `prefetchLazyViews()` function runs once on mount via `requestIdleCallback` to warm chunks. **Do not make these eager again** — bundle size matters.
### File browser editor
`packages/dashboard/app/components/FileEditor.tsx` is CodeMirror 6-backed (not a plain textarea). Language resolution lives in `packages/dashboard/app/utils/codemirror-language.ts` via `resolveCodeMirrorLanguage(filePath)`, currently mapping JS/TS, CSS, JSON, and Markdown extensions; unknown extensions intentionally fall back to plain text.
### Design Tokens
All new CSS **must** use these token variables instead of hardcoded values. Tokens are defined at `:root` and adapted for light mode via `[data-theme="light"]`.