Disallow v-html in the Tool Shed frontend

Same rule the client has, so new markup bindings go through v-sanitize-html
instead of slipping back in.

lib/tool_shed/webapp/frontend/eslint.config.mjs

@@ -28,6 +28,8 @@ export default defineConfig(
             "@typescript-eslint/no-unused-vars": "error",
             "vue/require-default-prop": "error",
             "vue/v-slot-style": "error",
+            // Markup goes through v-sanitize-html (DOMPurify) instead.
+            "vue/no-v-html": "error",
             // In typescript-eslint's recommended set before v8; kept so these still show up.
             "@typescript-eslint/adjacent-overload-signatures": "error",
             "@typescript-eslint/no-empty-function": "error",