Restore session/weekly usage percentage display in /stats

Feature Request: Restore Usage Percentage Display

Problem

The /stats command previously showed session and weekly usage percentages, which was essential for subscription users to manage their usage limits. This feature has been removed in a recent update.

Impact

• Subscription (Max plan) users cannot check how much of their session/weekly quota remains
• No way to know when session resets or how close to weekly limit
• Users only discover they've hit limits when responses slow down or get blocked
• Paying significant subscription fees without visibility into usage is frustrating

Request

Please restore the session/weekly usage percentage display, either in /stats or as a dedicated /usage command.

Current Behavior

• /stats only shows: Favorite Model, Usage Graph, Usage Streak
• /cost shows: "You are currently using your subscription to power your Claude Code usage" (no percentage)

Expected Behavior

• Display session usage percentage (e.g., "Session: 45% used")
• Display weekly usage percentage (e.g., "Weekly: 23% used")
• Ideally show estimated reset time

This information is critical for users to plan their workflow and avoid unexpected throttling.