Default Claude wrappers to auto permission mode when unset.

Preserve user-provided --permission-mode flags while injecting --permission-mode auto as the fallback.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

claude-tk

@@ -38,4 +38,16 @@ export ANTHROPIC_DEFAULT_HAIKU_MODEL="gpt-5.3-codex(medium)"
 
 echo "→ Backend: GPT"
 
-exec claude "$@"
+has_permission_mode=false
+for arg in "$@"; do
+  if [ "$arg" = "--permission-mode" ] || [[ "$arg" == --permission-mode=* ]]; then
+    has_permission_mode=true
+    break
+  fi
+done
+
+if [ "$has_permission_mode" = true ]; then
+  exec claude "$@"
+else
+  exec claude --permission-mode auto "$@"
+fi