Free statistics screen #151

Description

Create the statistics screen that displays the free tier statistics to all users. This screen is accessed from the Statistics option on the Profile screen (from #137).

The free statistics screen shows:

• Total tasks created
• Total tasks completed
• Current streak (consecutive days with at least one task completed)
• Longest streak ever achieved

Below the free statistics, a premium-upsell section invites the user to subscribe to unlock additional statistics (completion rate, average tasks per day, most productive day, priority breakdown). Tapping the upsell CTA opens the RevenueCat paywall.

The visual design of this screen must be reviewed as part of the ticket to ensure layout, data visualization, and visual hierarchy are correct.

Depends on #150 (Statistics data layer), #130 (Premium gating infrastructure), #137 (Navigation redesign).

Scope

In scope: StatisticsScreen composable, StatisticsViewModel, displaying free statistics, premium upsell section with CTA that opens RevenueCat paywall, navigation from Profile screen, design review, and string resources.

Out of scope: premium statistics display (separate ticket #30).

Acceptance criteria

• GIVEN the user taps the Statistics option on the Profile screen
  WHEN the navigation occurs
  THEN the Statistics screen is displayed
• GIVEN the Statistics screen is displayed
  WHEN the screen renders
  THEN it shows total tasks created, total tasks completed, current streak, and longest streak
• GIVEN the Statistics screen is displayed
  WHEN the screen renders
  THEN a premium-upsell section is shown below the free statistics
• GIVEN the user taps the premium-upsell CTA
  WHEN the action occurs
  THEN the RevenueCat paywall is presented
• GIVEN the Statistics screen UI has been implemented
  WHEN the ticket is reviewed
  THEN the design is explicitly reviewed for layout, data visualization, and visual hierarchy
• GIVEN user-visible text appears on the Statistics screen
  WHEN the app renders the screen
  THEN all visible text comes from string resources