tui: add permission indicator to footer

[terakael]

Add visible indicator in footer when permissions are pending to improve discoverability when user has scrolled away from the permission request.

• Display permission count with warning color (◉ N Permission/Permissions)
• Follows existing LSP/MCP pattern for accessing data via sync context
• Uses terminal-safe Unicode character (◉ U+25C9 FISHEYE)
• Warning color matches permission request border styling

[ariane-emory]

I've been using this one all day and it is pretty awesome.

One wish that you might not really be able to fulfill: it's nice if the indicator text has a dramatic, easily visible difference in colour from the regular text so it's easier to notice in a quick, distracted tenth of a second glance.

Now, since the colours depend on the themes, there's only so much you could do: without knowing what theme someone is using, we can only take guesses as to which theme elements are more likely to have a visually distinct colouring, we couldn't really guarantee it easily...

Great work though, I love it!

[ariane-emory]

This is invaluable. I do hope it gets merged in soon.

[rekram1-node]

I get so many prs now, you should @ me if i start missing somethign this is good but this is first time im seeing it

[github-actions[bot]]

lgtm

[rekram1-node]

/review

[github-actions[bot]]

lgtm