Caught panic

[b-jazz]

Describe the bug

I just updated to the latest (v0.2.0) and was playing with the various toggles and reduced the sampling rate to 300s. I wasn't paying too much attention, but about 5 minutes later, I got the panic message below.

To reproduce

Steps to reproduce the behavior:

1. Run flow
2. Press '-' ten times to get to 300s
3. Eventually see error

Expected behavior

Not panic.

Environment (please complete at minimum):

• OS: Manjaro
• Terminal: kitty
• flow version: v0.2.0
• Installation method: AUR

Screenshots / recordings

$ flow
Caught panic:

runtime error: index out of range [-9223372036854775808]

Restoring terminal...

goroutine 1 [running]:
runtime/debug.Stack()
        /opt/hostedtoolcache/go/1.24.2/x64/src/runtime/debug/stack.go:26 +0x5e
runtime/debug.PrintStack()
        /opt/hostedtoolcache/go/1.24.2/x64/src/runtime/debug/stack.go:18 +0x13
github.com/charmbracelet/bubbletea.(*Program).recoverFromPanic(0xc000160000, {0x5ff4e0, 0xc000018888})
        /home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea@v1.3.10/tea.go:847 +0xac
github.com/charmbracelet/bubbletea.(*Program).Run.func2()
        /home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea@v1.3.10/tea.go:638 +0xe8
panic({0x5ff4e0?, 0xc000018888?})
        /opt/hostedtoolcache/go/1.24.2/x64/src/runtime/panic.go:792 +0x132
github.com/programmersd21/flow/internal/theme.fiveStopGradient({{0x3b, 0x82, 0xf6}, {0x63, 0x66, 0xf1}, {0x6, 0xb6, 0xd4}, {0x0, ...}, ...}, ...)
        /home/runner/work/flow/flow/internal/theme/theme.go:472 +0xcc
github.com/programmersd21/flow/internal/theme.DownloadColor(_)
        /home/runner/work/flow/flow/internal/theme/theme.go:425 +0xaa
github.com/programmersd21/flow/internal/ui.renderColoredGraph({0xc0000244e0, 0x32, 0x7ea860?}, 0x0?, 0x4, 0xfff8000000000000, 0x0?, 0x1)    
        /home/runner/work/flow/flow/internal/ui/views.go:213 +0x1ca
github.com/programmersd21/flow/internal/ui.dashboardContentLines({{{{0xc000148040, 0x2, 0x2}, {{...}, {...}}, 0x0}, {{0xc000122410, 0x1, 0x1}, {{...}, ...}, ...}, ...}, ...}, ...)
        /home/runner/work/flow/flow/internal/ui/views.go:472 +0x4df
github.com/programmersd21/flow/internal/ui.pickViewModeAndContent({{{{0xc000148040, 0x2, 0x2}, {{...}, {...}}, 0x0}, {{0xc000122410, 0x1, 0x1}, {{...}, ...}, ...}, ...}, ...})
        /home/runner/work/flow/flow/internal/ui/views.go:409 +0x285
github.com/programmersd21/flow/internal/ui.Model.View({{{{0xc000148040, 0x2, 0x2}, {{...}, {...}}, 0x0}, {{0xc000122410, 0x1, 0x1}, {{...}, ...}, ...}, ...}, ...})
        /home/runner/work/flow/flow/internal/ui/model.go:455 +0x7b
github.com/charmbracelet/bubbletea.(*Program).eventLoop(0xc000160000, {0x668f48?, 0xc00015c008?}, 0xc00015e070)
        /home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea@v1.3.10/tea.go:502 +0x90a
github.com/charmbracelet/bubbletea.(*Program).Run(0xc000160000)
        /home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea@v1.3.10/tea.go:716 +0xb56
main.main()
        /home/runner/work/flow/flow/cmd/flow/main.go:123 +0x89b
flow: program was killed: program experienced a panic

Additional context

Any other context that might help diagnose.