## Story 004: Review historical focus data

**Persona:** Kai, 31, a writer in transition to tech. Kai is introspective and likes to review patterns. After a week of pomodoro, Kai wants to see: which days was I most productive? How does this week compare to last week?

**Situation:**

Kai has used the app for several days and is curious about trends. Kai opens the app and wants a view that shows more than today — maybe the week, maybe all-time stats.

**Need:**

As Kai, I want to see my focus session history across this week and all-time, so that I can notice productivity patterns and understand what conditions help me focus.

**Acceptance:**
- A 'History' or 'Stats' view shows sessions grouped by week and a summary for all-time
- For each week/all-time, I can see: total sessions, total focus time, average session length
- I can tap into a week to see the daily breakdown

**Tier:** enrichment

**Confusion-flags:**
- I don't know if Kai wants a graph or just numbers. The directive doesn't mention visualization. Numbers are probably v1; graphs are probably fast-follow.
- What is the scope of 'all-time'? If Kai has been using the app for 6 months, is 'all-time' practical or overwhelming?
