fix(zsh): restore ^S binding, suppress ^D logout warning

Move stty -ixon from widgets.zsh (lazy-loaded inside zle-line-init
hook) back to .zshrc so it runs before ZLE starts. Inside a ZLE hook,
the change only survives the first prompt because ZLE restores saved
terminal settings (with ixon on) between prompts.

Bind ^D to delete-char so pressing it on an empty line no longer
triggers the IGNORE_EOF 'use exit to exit' warning spam.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

home/.zsh/widgets.zsh

@@ -1,6 +1,8 @@
 _dots_load_keybindings() {
     bindkey -e
-    stty -ixon 2>/dev/null
+
+    # Ctrl+D: delete char (suppress IGNORE_EOF logout warning)
+    bindkey '^D' delete-char
 
     # Ctrl+J: zoxide jump
     _dots_zoxide_widget() {

home/.zshrc

@@ -110,7 +110,7 @@ _dots_load_history() {
 }
 _dots_load_history
 
-setopt IGNORE_EOF
+stty -ixon 2>/dev/null
 
 # --- Tool init (cached) ---