🚀 Feature: Git Review Panel (Diff + Comments)

[vost-armtek]

💡 Idea

Add a Git panel inside CMUX to handle not only basic actions (commit, stash, branch), but also:
• 🔍 Diff review (inline / side-by-side)
• 💬 Inline comments on code

🎯 Why

Today, I still need tools like Codex App only for code review & comments.
If CMUX had this, it could become a complete dev workflow tool with zero context switching.

⸻

⚡ Impact
• Stay fully inside CMUX
• Faster review workflow
• Strong differentiation vs other terminals

⸻

👉 This would make CMUX a serious Codex App alternative.

[baeroe]

This paired with a minimal editor would be lit ❤️