routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/eslint-plugin-unicorn/rules/consistent-template-literal-escape.js

@@ -0,0 +1,52 @@
+import {replaceTemplateElement} from './fix/index.js';
+import {isTaggedTemplateLiteral} from './ast/index.js';
+
+const MESSAGE_ID = 'consistent-template-literal-escape';
+const messages = {
+	[MESSAGE_ID]: 'Use `\\${` instead of `$\\{` to escape in template literals.',
+};
+
+/** @param {import('eslint').Rule.RuleContext} context */
+const create = context => {
+	context.on('TemplateElement', node => {
+		if (isTaggedTemplateLiteral(node.parent)) {
+			return;
+		}
+
+		const {raw} = node.value;
+
+		// Match `$\{` or `\$\{` and replace with `\${`.
+		// The `\\?` makes the leading backslash optional to handle both patterns.
+		// The lookbehind ensures an even number of preceding backslashes (including zero).
+		const fixedRaw = raw.replaceAll(
+			/(?<=(?:^|[^\\])(?:\\\\)*)\\?\$\\{/g,
+			String.raw`\${`,
+		);
+
+		if (raw !== fixedRaw) {
+			const problem = {
+				node,
+				messageId: MESSAGE_ID,
+				fix: fixer => replaceTemplateElement(node, fixedRaw, context, fixer),
+			};
+
+			return problem;
+		}
+	});
+};
+
+/** @type {import('eslint').Rule.RuleModule} */
+const config = {
+	create,
+	meta: {
+		type: 'suggestion',
+		docs: {
+			description: 'Enforce consistent style for escaping `${` in template literals.',
+			recommended: true,
+		},
+		fixable: 'code',
+		messages,
+	},
+};
+
+export default config;