add prefer-const to eslint rules,

remove empty block in dialog

dev_config/eslint.config.mjs

@@ -23,6 +23,7 @@ export default defineConfig([js.configs.recommended,{
             "argsIgnorePattern": "^_",
             "varsIgnorePattern": "^_",
             "caughtErrorsIgnorePattern": "^_"
-        }]
+        }],
+		"prefer-const": ["error"]
     },
 }]);

web/scripts/dialog.js

@@ -113,8 +113,7 @@ class ErrorDialog extends HTMLElement {
 		}
 
 		this.dialog.addEventListener("close", () => {
-			if (this.dialog.returnValue === "ok") {}
-			else if (this.dialog.returnValue === "copy") {
+			if (this.dialog.returnValue === "copy") {
 				let errors = "";
 				for (const error of this.errors.childNodes) {
 					errors += `${error.innerText}\n`;