[Bug]: nvpair-tui panics (index out of range) in Nodes table renderer on first node discovery

Summary

nvpair-tui panics with an index out of range error in the Nodes-tab table renderer shortly after starting, once it discovers at least one node on the network. The panic is unrecoverable and kills the TUI (bubbletea's panic recovery catches it and shuts down cleanly, but the interface exits rather than staying usable).

Environment

• PAIR version: 0.1.1 (NVPAIR-Setup-0.1.1-amd64.deb)
• OS: Linux Mint 22.3 "Zena" (Ubuntu 24.04 Noble base), x86_64
• Install method: official .deb package (sudo apt install ./NVPAIR-Setup-0.1.1-amd64.deb)
• Invoked via: nvpair (the installed CLI wrapper, which execs /opt/PAIR/resources/cli-bin/nvpair-tui), run over SSH in a fresh tmux session (no desktop app running at the same time)

Steps to reproduce

1. Install the .deb release on a machine with at least one Ollama or LM Studio engine reachable on the LAN.
2. Run nvpair (or nvpair-tui directly) from a terminal — no $DISPLAY, purely headless/SSH.
3. Wait for it to discover a node on the network (its own local node, or another one).
4. The TUI panics and exits within a few seconds of a node appearing.

Actual behavior

Caught panic:

runtime error: index out of range [0] with length 0

Restoring terminal...

goroutine 1 [running]:
runtime/debug.Stack()
	runtime/debug/stack.go:26 +0x5e
runtime/debug.PrintStack()
	runtime/debug/stack.go:18 +0x13
github.com/charmbracelet/bubbletea.(*Program).recoverFromPanic(0x37925edde3c0, {0x5f70c0, 0x37925edd0108})
	github.com/charmbracelet/bubbletea@v1.3.10/tea.go:847 +0xac
github.com/charmbracelet/bubbletea.(*Program).Run.func2()
	github.com/charmbracelet/bubbletea@v1.3.10/tea.go:638 +0x10c
panic({0x5f70c0?, 0x37925edd0108?})
	runtime/panic.go:860 +0x13a
github.com/charmbracelet/bubbles/table.(*Model).renderRow(0x37925ee54010, 0x0)
	github.com/charmbracelet/bubbles@v1.0.0/table/table.go:431 +0x7a5
github.com/charmbracelet/bubbles/table.(*Model).UpdateViewport(0x37925ee54010)
	github.com/charmbracelet/bubbles@v1.0.0/table/table.go:279 +0x135
github.com/charmbracelet/bubbles/table.(*Model).SetRows(...)
	github.com/charmbracelet/bubbles@v1.0.0/table/table.go:315
nvpair-tui/ui.(*nodesView).setNodes(0x37925ee54008, {0x37925edb2960, 0x1, 0x5c3680?})
	nvpair-tui/ui/nodes.go:193 +0x37f
nvpair-tui/ui.(*nodesView).Update(0x37925ee54008, {0x5da820?, 0x37925edb2900})
	nvpair-tui/ui/nodes.go:111 +0x108
nvpair-tui/ui.(*Model).broadcast(0x37925f01b6e8, {0x5da820, 0x37925edb2900})
	nvpair-tui/ui/model.go:158 +0xcd
nvpair-tui/ui.Model.Update({0x37925edd4190, 0x37925edc9260, {{{0x37925edacf60, 0x3, 0x3}, {{...}, {...}}, 0x0}, {{0x37925edacf90, 0x3, ...}, ...}, ...}, ...)
	nvpair-tui/ui/model.go:108 +0xd7
github.com/charmbracelet/bubbletea.(*Program).eventLoop(0x37925edde3c0, {0x621940?, 0x37925ee34008?}, 0x37925ed9a310)
	github.com/charmbracelet/bubbletea@v1.3.10/tea.go:494 +0x7ce
github.com/charmbracelet/bubbletea.(*Program).Run(0x37925edde3c0)
	github.com/charmbracelet/bubbletea@v1.3.10/tea.go:716 +0xae7
nvpair-tui/ui.Run(0x37925edd4190, {0x620c40, 0x37925ed820d0})
	nvpair-tui/ui/ui.go:26 +0x145
main.main()
	nvpair-tui/main.go:73 +0x419
13:43:29.800 [nvpair-tui] ERROR ui error err="program was killed: program experienced a panic"
13:43:29.816 [nvpair-tui] INFO shutdown complete

Expected behavior

The Nodes tab should render the discovered node(s) without crashing.

Notes

The trace points at nodesView.setNodes (ui/nodes.go:193) calling into bubbles/table's SetRows/UpdateViewport/renderRow, which panics on a table with zero configured rows/columns receiving row data — looks like the nodes table's columns/dimensions aren't initialized before the first setNodes call lands from broadcast. Didn't find an existing issue for this via search, apologies if it's a duplicate.

Happy to provide more logs/details if useful.