Adds Reinstall method to PackageManager and AURHelper interfaces
so modules can invoke the concrete Reinstall helpers behind the
interface. *Pacman and *Yay already satisfy it.
Make internal/theming.List the single source of truth for themes:
- Drop tui.BuiltinThemes, tui.ThemeByID, and the NvChadTheme field on
tui.Theme. tui.Theme is now a thin {ID, Name} display value.
- Wizard populates its dropdown from theming.List() and uses
DisplayName for the label.
- neovim.resolvedTheme uses theming.Get (with theming.List()[0] as a
fallback) instead of a caller-supplied []tui.Theme slice.
- neovim.New signature loses the themes []tui.Theme parameter; update
cmd/archduino/main.go and all neovim tests to match.
Break the resulting neovim→theming import cycle (theming previously
imported neovim for WriteChadrc) by inverting the dependency:
theming exposes a ChadrcWriter function hook, and neovim registers
its WriteChadrc into it via package init. The theming test stubs
ChadrcWriter directly to exercise the chadrc-rewrite branch without
pulling neovim in and re-creating the cycle.
Delete the now-obsolete TestBuiltinThemesCarryNvChadName / TestThemeByID*
tests in internal/tui/state_test.go — their coverage lives in the
theming package's own tests.
- neofetch was removed from Arch's official repos; fastfetch is the maintained replacement.
- ExecRunner.Run previously discarded stderr, so any 'sudo pacman' failure surfaced only as 'exit status 1'. Now the returned error includes the captured stderr (matching what Output already did).
- tui/doc.go: remove teatest blank import (test harness in prod binary)
- cmd: honor wizard HaltOnError toggle in addition to --halt-on-error flag
- cmd: wire SIGINT/SIGTERM to root context via signal.NotifyContext
- dashboard/run: derive engine context and cancel on tea.Program exit
so the engine goroutine does not outlive Run
