feat(cmux): add cmux and ghostty configs

cmux is Ghostty-based: terminal rendering (font, cursor, clipboard,
shell-integration) lives in ghostty/config, while cmux-owned settings
go in cmux/settings.json. Both dirs symlinked via XDG_CONFIG_FILES.

Author: mhiro2

Makefile

@@ -1,4 +1,4 @@
-XDG_CONFIG_FILES := bat git mise nvim tmux
+XDG_CONFIG_FILES := bat cmux ghostty git mise nvim tmux
 EXCLUDE_FILES    := .DS_Store .git .github .gitignore .gitmodules .claude .tmux
 CLAUDE_FILES     := .claude/settings.json .claude/statusline.py
 DOT_FILES        := $(filter-out $(EXCLUDE_FILES), $(wildcard .??*))

cmux/settings.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "https://raw.githubusercontent.com/manaflow-ai/cmux/main/web/data/cmux-settings.schema.json",
+  "schemaVersion": 1,
+  "app": {
+    "commandPaletteSearchesAllSurfaces": true
+  }
+}

ghostty/config

@@ -0,0 +1,30 @@
+# Theme
+theme = Monokai Pro
+
+# Font
+font-family = Moralerspace Neon
+font-size = 13
+
+# Cursor
+cursor-style = bar
+cursor-style-blink = true
+
+# Mouse / clipboard
+mouse-hide-while-typing = true
+copy-on-select = clipboard
+clipboard-paste-protection = true
+clipboard-trim-trailing-spaces = true
+
+# Window
+window-padding-x = 8
+window-padding-y = 8
+window-padding-balance = true
+background-opacity = 0.70
+macos-titlebar-style = transparent
+macos-option-as-alt = true
+
+confirm-close-surface = false
+
+# Shell integration
+shell-integration = detect
+shell-integration-features = cursor,sudo,title,ssh-env,ssh-terminfo