[FEATURE] Displaying the function in which a diff is occurring

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Currently with diffs in the terminal it is impossible to tell the exact context of an edit just from what is shown. The same code may appear in different functions in the file and it matters which one the change is occuring in.
<img width="569" height="124" alt="Image" src="https://github.com/user-attachments/assets/be5d7d90-2b70-4546-b6bd-d0877b3be2d2" />

Proposed Solution

Github Desktop does this nicely by showing the relevant function, seen here with the line @@ -121,7 +121,6 @@ def index(request): in a different style above the diff. This simple change is massively helpful!
<img width="569" height="154" alt="Image" src="https://github.com/user-attachments/assets/eb2c3328-626e-4f0a-89c9-8214b85a0254" />

Alternative Solutions

Only real alternative is using a separate diff tool (like Github Desktop) which kind of breaks the flow.

Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

Any code suggestions

Additional Context

_No response_