[Feature Request] Implement /stats command for visual usage insights (similar to Claude Code)

[DevSissi]

Feature hasn't been suggested before.

• [x] I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Feature Request: I would like to request a visual statistics dashboard command (e.g., /stats), similar to the one implemented in Claude Code. Like this:

Proposed Functionality: When the user runs /stats, the interface should display a visual overview of their coding activity, including:

1. Activity Heatmap: A GitHub-style contribution graph showing usage intensity over the last few months.
2. Usage Metrics:
   • Total tokens used (e.g., "19.9m").
   • Favorite model usage.
   • Active days and current streaks.
3. Session Insights:
   • Longest session duration.
   • Peak coding hours.
   • Fun comparisons (e.g., "You've used ~27x more tokens than War and Peace").

Why this is useful:

• Transparency: Helps users track their API/Token consumption easily.
• Gamification: Streaks and stats encourage users to stay engaged with the tool.
• Insight: Helps users understand their peak productivity times.

This feature adds a polished, professional feel to the tool and greatly enhances the user experience.