Create Reader Preferences

Task

Use the existing ReaderPreference model as the source of truth for reader-specific settings.

The preference record includes:

theme
fontFamily
fontSize
lineHeight
contentWidth

Create a default record when a user first needs Reader preferences, or use application defaults until the first update.

Keep the defaults aligned with the prepared Reader UI.

Test

Create a new user and inspect the preference state after opening the Reader.

Confirm sensible defaults are available even before the user changes anything.

Checkpoint

Every authenticated user has a predictable Reader preference state.