docs: clarify CLI install

scripts/install.sh

@@ -132,6 +132,12 @@ exec "$VENV_DIR/bin/python" -m seedpass.cli "\$@"
 EOF2
     chmod +x "$LAUNCHER_PATH"
 
+    existing_cmd=$(command -v seedpass 2>/dev/null || true)
+    if [ -n "$existing_cmd" ] && [ "$existing_cmd" != "$LAUNCHER_PATH" ]; then
+        print_warning "Another 'seedpass' command was found at $existing_cmd."
+        print_warning "Ensure '$LAUNCHER_DIR' comes first in your PATH or remove the old installation."
+    fi
+
     # 8. Final instructions
     print_success "Installation/update complete!"
     print_info "You can now run the application by typing: seedpass"