chore: scaffold apps/basic from with-lingui

Made-with: Cursor

apps/basic/.github/instructions/api.instructions.md

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+---
+applyTo: "src/api/**/*.ts,src/utils/http.ts,src/mocks/handlers/**/*.ts,src/mocks/createHandler.ts"
+description: "Use when editing API clients, schemas, HTTP behavior, response types, or MSW endpoint handlers. Keywords: api, http, schema, zod, handler, endpoint, auth, users."
+---
+
+# API Instructions
+
+## Purpose
+
+Maintain strict API contracts and consistent server/client mock behavior.
+
+## Do
+
+- Keep request/response shapes schema-driven and type-safe.
+- Reuse endpoint constants and shared response helpers.
+- Keep handler response envelope consistent (`code`, `data`, `message`).
+- Ensure mock handlers reflect real API behavior and error semantics.
+- Keep naming stable for endpoint keys and mutation/query keys.
+
+## Do Not
+
+- Do not return ad-hoc response shapes for one-off convenience.
+- Do not bypass schema parsing in new client mutations/queries.
+- Do not mix unrelated domain endpoints in the same module.
+
+## Validation
+
+- Verify TypeScript and schema parsing paths compile cleanly.
+- Run: `vp check --no-fmt`