chore: scaffold apps/basic from with-lingui

Made-with: Cursor

apps/basic/.github/instructions/refactor.instructions.md

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+---
+
+## applyTo: "src/\*_/_.{ts,tsx}"
+
+description: "Use when refactoring existing code for deduplication, modularization, naming cleanup, or maintainability improvements without behavior changes. Keywords: refactor, cleanup, simplify, deduplicate, maintainability."
+
+# Refactor Instructions
+
+## Purpose
+
+Reduce duplication while preserving behavior and public contracts.
+
+## Do
+
+- Keep refactors incremental and scoped to one concern per change.
+- Prefer extracting shared utilities/hooks/components over large rewrites.
+- Preserve existing external behavior and route/store contracts.
+- Keep diffs reviewable with minimal unrelated formatting churn.
+- Add or update lightweight comments only when logic is non-obvious.
+
+## Do Not
+
+- Do not change runtime behavior unless explicitly requested.
+- Do not rename broadly across the codebase without clear benefit.
+- Do not delete tests that still cover unique critical scenarios.
+- Do not introduce large dependencies for minor convenience; prefer composition or small utilities.
+
+## Considerations
+
+- Bundle: Main app chunk is ~135KB (gzip ~41KB). Ant Design (vendor-antd) and TanStack (vendor-tanstack) are in separate chunks for parallel loading. Avoid adding large UI libraries when Ant Design covers the need.
+- Type safety: Keep validations at API boundaries (Zod schemas) rather than adding more runtime checks throughout the app.
+
+## Validation
+
+- Confirm no new diagnostics in touched files.
+- Run: `vp check --no-fmt`
+- For significant changes, verify bundle size impact: `vp build 2>&1 | grep "kB"`