Preserve Accessibility Preferences Across Devices and Sessions

When a user saves font scale or contrast theme preferences, ThemeService writes the values to ThemeRepository, which persists them to the user's Supabase record. On app startup or login, ThemeService reads the persisted preferences from ThemeRepository and applies the saved ThemeData before the first screen renders, so the app never flashes the default theme before switching. This applies across devices — logging in on a new or shared device immediately adopts the user's saved accessibility configuration. Changes made on one device propagate to other active sessions via Supabase real-time sync.

HIGH story-typography-contrast-settings-peer-mentor-005 3 pts

Story Points

High

Priority

Typography & Contrast Settings

Feature

User Story

As a user

I want my font scale and contrast theme preferences to be automatically restored when I log in on any device

So that So that I do not have to reconfigure accessibility settings every time I switch devices or reinstall the app, ensuring a consistent and accessible experience from the first screen after login

Acceptance Criteria

Given a user has saved non-default font scale and contrast theme preferences, when they close and reopen the app on the same device, then the saved preferences are applied before the first screen is displayed
Given a user has saved accessibility preferences on one device, when they log in on a different device for the first time, then the same font scale and contrast theme are applied immediately after login without requiring manual reconfiguration
Given a user updates their accessibility preferences on one device while logged in on a second device, when the change is saved, then the second device reflects the new preference within a reasonable sync window
Given a user who has never configured accessibility preferences logs in, when the app starts, then the default Standard theme and 100% font scale are applied without any error or delay
Given a user logs out, when they log back in with the same account, then their accessibility preferences are fully restored

Business Value

Peer mentors frequently use the app on a single personal device but may need to reinstall or switch phones. Coordinators may share devices or move between office and field contexts. Without cross-device persistence, users with vision or motor impairments must reconfigure accessibility settings after every reinstall — a significant friction point that could lead to abandonment of the app. Reliable persistence ensures that once a user has configured an accessible experience, it stays configured, reducing coordinator support load and improving long-term retention.

Components

Theme Service service
Theme Repository data

Typography & Contrast Settings

Related Feature

Peer Mentor (Likeperson)

User Role