fix(deps): align engines.node with stylelint 18's supported Node range

stylelint 18 requires ^22.22.2 || ^24.15.0 || >=26.0.0. Narrow the
declared frontend range to match so installs on unsupported Node
versions don't hit EBADENGINE. No other locked package needs a stricter
range.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/package-lock.json

@@ -32,7 +32,7 @@
 				"vite": "^8.3.8"
 			},
 			"engines": {
-				"node": "^22.13.0 || >=24"
+				"node": "^22.22.2 || ^24.15.0 || >=26.0.0"
 			}
 		},
 		"node_modules/@babel/helper-string-parser": {

frontend/package.json

@@ -37,6 +37,6 @@
 		"vue-router": "^5.5.0"
 	},
 	"engines": {
-		"node": "^22.13.0 || >=24"
+		"node": "^22.22.2 || ^24.15.0 || >=26.0.0"
 	}
 }