Feat/image preview tabs

[shuv1337]

Summary

• Always call list() for parent directory in file fetch (removes unnecessary conditional)
• Add image preview support in file tabs
• SVG files get a toggle to switch between rendered image and source code

Changes

• packages/app/src/context/local.tsx: Remove conditional check before list(parent)
• packages/app/src/pages/session.tsx: New FileTabContent component for rendering images and code with SVG toggle

Proof

Before:

https://github.com/user-attachments/assets/89f3ac56-2960-4450-81cf-ac8b24e2c0de

After:

https://github.com/user-attachments/assets/302b7b48-4856-4673-8b77-c97bc972873c