🛠️ Task: <Implement App Bar and Navigation>

### 🔗 Parent Issue

Build Profile Summary Widget (Followers / Blocked / Muted States)

### 🧩 Module

User States

### 📝 Description

Develop the top navigation bar with a back button and screen title. Integrate navigation logic to return to the previous page.

### ✅ Acceptance Criteria

_No response_

### 🔥 Priority

Medium

### 💬 Additional Notes

_No response_