Unable to open item in browser from markdown view after filtering

[YourAverageMoron]

When attempting to open an item in browser from the markdown view after filtering, nom panics with the following message:

interface conversion: list.Item is nil, not commands.TUIItem

Steps to reproduce:

1. Filter items
2. Select an item to enter markdown view
3. Use "o" to open in browser

Note: Opening an item in the browser works fine from a filtered list view, it's only when you enter markdown mode that it panics

Sytem: MacOS 14 zsh tmux alacritty

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I had a quick look into this and it seems like its this line thats causing the issue: internal/commands/viewport.go#L31 which isn't expecting a nil response from m.list.SelectedItem()

Bubble tea SelectedItem - list.go#L440 returns nil iflen(m.VisibleItems()) == 0, but after filtering and entering the markdown mode m.VisibleItems() returns an empty list

[guyfedwards]

Fixed in https://github.com/guyfedwards/nom/releases/tag/v2.6.1. Thanks for the detailed report @YourAverageMoron :tada: