chore: scaffold apps/basic from with-lingui

Made-with: Cursor

apps/basic/.github/instructions/frontend.instructions.md

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+---
+applyTo: "src/**/*.{ts,tsx,css}"
+description: "Use when editing React UI, route pages, components, styles, layout, i18n text, or Ant Design behavior. Keywords: frontend, component, page, ui, layout, style, antd, i18n."
+---
+
+# Frontend Instructions
+
+## Purpose
+
+Keep frontend changes predictable, minimal, and reusable for AI-assisted edits.
+
+## Do
+
+- Preserve existing route contracts and UI behavior unless explicitly asked.
+- Prefer reusable components and hooks over copy-paste logic.
+- Keep styles token-driven using existing theme/store patterns.
+- For Ant Design styling, follow this priority: component native API (`variant`/`type`/`size`/`styles`/`classNames`) -> `theme.useToken()` with inline `style` -> `className` + external CSS.
+- Keep translations compatible with Lingui macros and catalogs.
+- Follow current folder conventions under src/components and src/routes.
+
+## Do Not
+
+- Do not introduce new UI libraries when Ant Design already covers the need.
+- Do not bypass existing theme/store abstractions with hardcoded global state.
+- Do not write CSS overrides first when props or semantic `styles` can express the same UI.
+- Do not refactor unrelated files in the same change.
+
+## Validation
+
+- Run: `vp check --no-fmt`
+- For UI flow changes, run focused e2e where possible.