docs: add UDEV Gothic NF font installation instructions

README.md

@@ -45,6 +45,14 @@ On first run, you'll be prompted for:
 
 These values are stored in `~/.config/chezmoi/chezmoi.yaml`.
 
+### Install Font (for Ghostty)
+
+```bash
+# macOS
+brew tap homebrew/cask-fonts
+brew install --cask font-udev-gothic-nf
+```
+
 ### Install Development Tools
 
 ```bash
@@ -105,10 +113,30 @@ dots/
 ## Features
 
 ### Terminal: Ghostty
-- Font: JetBrains Mono Nerd Font
+- Font: UDEV Gothic NF (Japanese-friendly Nerd Font)
 - Theme: Catppuccin Mocha
 - Native tabs/splits
 
+#### Font Installation
+
+The Ghostty terminal uses [UDEV Gothic NF](https://github.com/yuru7/udev-gothic), a programming font with Nerd Font icons and excellent Japanese support.
+
+**macOS (Homebrew):**
+```bash
+brew tap homebrew/cask-fonts
+brew install --cask font-udev-gothic-nf
+```
+
+**Linux (manual):**
+```bash
+# Download and install to user fonts directory
+mkdir -p ~/.local/share/fonts
+cd ~/.local/share/fonts
+curl -fLO https://github.com/yuru7/udev-gothic/releases/download/v2.1.0/UDEVGothic_NF_v2.1.0.zip
+unzip UDEVGothic_NF_v2.1.0.zip
+fc-cache -fv
+```
+
 ### Shell: zsh + zinit turbo mode
 - Fast startup (~50ms)
 - Syntax highlighting

dot_config/ghostty/config

@@ -2,7 +2,7 @@
 # https://ghostty.org/docs/config
 
 # Font
-font-family = "JetBrainsMono Nerd Font"
+font-family = "UDEV Gothic NF"
 font-size = 14
 
 # Window

private_dot_ssh/config.tmpl

@@ -18,3 +18,5 @@ Host *
   VisualHostKey no
   ServerAliveInterval 15
   ServerAliveCountMax 5
+  # Use xterm-256color for compatibility (most servers lack Ghostty terminfo)
+  SetEnv TERM=xterm-256color