feat(ghostty): adopt live config into repo

The repo carried an empty home_config/ghostty/config; the actual working
config (Victor Mono Nerd Font, australis theme, ssh-terminfo, scrollback,
macOS option-as-alt) lived only on the machine. Pull it in so stow links
the real config instead of blanking it.

home_config/ghostty/config

@@ -0,0 +1,53 @@
+# Ghostty configuration
+# Docs: https://ghostty.org/docs/config
+# Reload in-app without restarting: Cmd+Shift+,
+
+# --- Font ---------------------------------------------------------------
+# VictorMono Nerd Font (installed in ~/Library/Fonts). The "Mono" variant
+# keeps glyphs strictly fixed-width, which is what you want in a terminal.
+font-family = VictorMono Nerd Font Mono
+font-size = 14
+# Slightly heavier strokes render nicer on macOS Retina displays.
+font-thicken = true
+
+# Victor Mono ships a gorgeous cursive italic — make sure it's used.
+font-style-italic = Italic
+
+# --- Theme --------------------------------------------------------------
+# Australis (Aurora Australis) — a dark theme. Defined in
+# ~/.config/ghostty/themes/australis (ported from the upstream WezTerm config).
+theme = australis
+
+# --- Cursor -------------------------------------------------------------
+cursor-style = block
+cursor-style-blink = false
+mouse-hide-while-typing = true
+
+# --- Window -------------------------------------------------------------
+window-padding-x = 8
+window-padding-y = 6
+# Keep padding color matched to the background for a clean look.
+window-padding-balance = true
+# Reopen with the same windows/tabs you left.
+window-save-state = always
+macos-titlebar-style = tabs
+background-opacity = 0.97
+
+# --- Clipboard / selection ---------------------------------------------
+copy-on-select = clipboard
+clipboard-trim-trailing-spaces = true
+
+# --- macOS / shell behavior --------------------------------------------
+# Let the left Option key send Alt (so Alt+f, Alt+b, etc. work in shells/
+# editors); keep right Option for composing accented characters.
+macos-option-as-alt = left
+shell-integration = detect
+# ssh-env + ssh-terminfo: on connect, propagate a compatible TERM and
+# auto-install Ghostty's terminfo entry on the remote host (v1.2.0+), so
+# remote apps render correctly without "unknown terminal type" errors.
+shell-integration-features = cursor,sudo,title,ssh-env,ssh-terminfo
+
+# --- Misc ---------------------------------------------------------------
+# Only prompt to close when a process is still running.
+confirm-close-surface = true
+scrollback-limit = 10000000