init: add source code from src.zip

src/utils/configConstants.ts

@@ -0,0 +1,21 @@
+// These constants are in a separate file to avoid circular dependency issues.
+// Do NOT add imports to this file - it must remain dependency-free.
+
+export const NOTIFICATION_CHANNELS = [
+  'auto',
+  'iterm2',
+  'iterm2_with_bell',
+  'terminal_bell',
+  'kitty',
+  'ghostty',
+  'notifications_disabled',
+] as const
+
+// Valid editor modes (excludes deprecated 'emacs' which is auto-migrated to 'normal')
+export const EDITOR_MODES = ['normal', 'vim'] as const
+
+// Valid teammate modes for spawning
+// 'tmux' = traditional tmux-based teammates
+// 'in-process' = in-process teammates running in same process
+// 'auto' = automatically choose based on context (default)
+export const TEAMMATE_MODES = ['auto', 'tmux', 'in-process'] as const