[BUG] Image viewing logic is not working for edit tab

[AmanatAliPanhwer]

🧠 Description

The image viewing functionality, which allows for a full-screen view of the post's main image, is not working on the /edit page. While it works correctly on the main post view, clicking the image on the edit page does not trigger the viewer.

🧩 Steps to Reproduce

1. Go to an existing post's edit page (e.g., /edit/1).
2. Click on the post's main image.
3. The image does not open in a full-screen viewer.

⚙️ Expected Behaviour

Clicking the image on the edit page should open it in the same full-screen image viewer that is used on the main post page.

📸 Screenshots or Logs

N/A

🧾 Environment

• OS: Any
• Browser: Any
• Python version: 3.13
• Flask version: 3.0.3

🧰 Additional Context

The JavaScript logic for the image viewer might not be correctly wired up on the edit.html template.