Convert Cypress files to TypeScript

[tudddorrr]

No description provided.

[claude]

This is a clean TypeScript migration for the Cypress test suite. A couple of minor points worth addressing:

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🔵 Minor

cypress/tsconfig.json does not cover cypress.config.ts

The "include": ["**/*.ts"] in cypress/tsconfig.json resolves to cypress/**/*.ts (relative to where the tsconfig lives). The root-level cypress.config.ts sits outside that directory and will not be type-checked by this config — nor by tsconfig.json (which only includes src/) or tsconfig.node.json (which only includes vite.config.ts).

Fix: add an explicit reference in cypress/tsconfig.json:

"include": ["**/*.ts", "../cypress.config.ts"]

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"types": ["vitest/globals"] in tsconfig.node.json is unnecessary

The old /// <reference types="vitest" /> directive was needed to augment defineConfig from vite with Vitest's test options. Switching to import { defineConfig } from 'vitest/config' makes the directive redundant and already provides those config types directly through the import.

vitest/globals is a separate concern — it injects globals like describe, it, and expect into the environment, which are not needed in vite.config.ts. The addition is harmless but unnecessary noise in the node config.

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Overall this is a solid, straightforward conversion with the declare global augmentation for custom commands and the centralised cypress/tsconfig.json being the right approach.