Delete the separate config/schema.ts that duplicated every Zod schema.
DittoConfigSchema is now simply AppConfigSchema.partial().strict(),
defined in src/lib/schemas.ts alongside everything else. vite.config.ts
imports it directly via a relative path.
Read an optional ditto.json (or CONFIG_FILE env) at build time, validate
it with Zod, and inject the result via Vite's define. At runtime the
build-time values are merged between the hardcoded defaults and user
localStorage, giving precedence: user > build-time > hardcoded.
Extract canonical Zod schemas into config/schema.ts (no path aliases)
so they can be imported from both vite.config.ts and runtime code.
Move AppConfigSchema out of AppProvider into src/lib/schemas.ts to
eliminate duplication.
Alex Gleason