SvelteKit conventions

Use interface instead of type whenever possible.
For any component Component.svelte, define props as interface ComponentProps.
Use === instead of == whenever possible.
Prefer ?? over || unless you explicitly need to handle other falsy values.
Naming conventions:
- Camel case in code most of the times.
- Camel case for HTML ids/names, but kebab case for class names.
- Kebab case for folders in routes/.
- Pascal case for classes, interfaces and types.
- Pascal case for components and component files.
- Non-Svelte file names in lowercase snake case.
- Enum class property names uppercase, but string values lowercase.
- Boolean variables and methods/functions returning boolean should be prefixed with is or has.
- Use the same names for interfaces and properties corresponding to specific Pydantic models/schemas and attributes if possible.
- Interface names in singular unless inappropriate.
- Environment variables uppercase snake case.