session-metrics

Show session usage metrics and analytics. ## Steps 1. **Parse the time period.** Convert the user's argument to a date range (YYYY-MM-DD). Default to the past 7 days if no period specified. Common inputs: "past week", "this month", "past 30 days", "may 2026". 2. **Fetch metrics.** Call `get_session_metrics` with: - `startDate` and `endDate` from the parsed range 3. **Format the dashboard:** ### Session Metrics: {start} to {end} **Overview** - {total sessions} sessions | {total messages} messages - Tools: {breakdown with counts} **Top Projects** (table: project, sessions, messages) List the top 10 by session count. **Daily Activity** (table or mini-chart: date, sessions, messages) Show each day in the range. **Active Hours** Render the hours heatmap as a simple bar chart or table showing which hours of the day have the most sessions. Convert to local time labels (e.g., "9am", "2pm"). ## Guidelines - Round percentages to whole numbers. - For active hours, group into time blocks if the data is sparse (morning/afternoon/evening/night). - If a tool has zero sessions, omit it from the breakdown. - Keep the formatting clean — this should be pasteable into a document or message.