Fix prefer-add-event-listener, no-unassigned-import, require-module-specifiers

Resolves all 9 remaining non-console lint warnings and promotes all
three rules to errors in .oxlintrc.json.

- prefer-add-event-listener: converted onchange/onclick/onload
  assignments to addEventListener in useDraftNotifications.ts and
  admin.data-sync.tsx; stored changeHandler ref for proper cleanup
  with removeEventListener
- no-unassigned-import: configured rule with allow list for legitimate
  side-effect imports (*.css, @testing-library/jest-dom,
  @testing-library/cypress/add-commands)
- require-module-specifiers: removed redundant `export {}` from
  cypress/support/e2e.ts (file already has an import)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.oxlintrc.json

@@ -37,9 +37,14 @@
     "react/self-closing-comp": "warn",
 
     "import/no-duplicates": "error",
+    "import/no-unassigned-import": ["error", {
+      "allow": ["**/*.css", "@testing-library/jest-dom", "@testing-library/cypress/add-commands"]
+    }],
 
     "no-shadow": "error",
-    "unicorn/consistent-function-scoping": "error"
+    "unicorn/consistent-function-scoping": "error",
+    "unicorn/prefer-add-event-listener": "error",
+    "unicorn/require-module-specifiers": "error"
   },
   "overrides": [
     {

app/hooks/useDraftNotifications.ts

@@ -44,18 +44,20 @@ export function useDraftNotifications(seasonId: string, userId: string) {
     // would still be null at that point without the flag).
     let aborted = false;
     let permissionStatus: PermissionStatus | null = null;
+    let changeHandler: (() => void) | null = null;
     navigator.permissions
       .query({ name: "notifications" })
       .then((status) => {
         if (aborted) return;
         permissionStatus = status;
-        status.onchange = () => {
+        changeHandler = () => {
           setPermissionState(status.state as NotificationPermission);
           // If permission was revoked, disable notifications
           if (status.state !== "granted") {
             setEnabledState(false);
           }
         };
+        status.addEventListener("change", changeHandler);
       })
       .catch(() => {
         // Permissions API not available in all environments; silently ignore
@@ -63,8 +65,8 @@ export function useDraftNotifications(seasonId: string, userId: string) {
 
     return () => {
       aborted = true;
-      if (permissionStatus) {
-        permissionStatus.onchange = null;
+      if (permissionStatus && changeHandler) {
+        permissionStatus.removeEventListener("change", changeHandler);
       }
     };
   }, [seasonId, userId]);
@@ -120,7 +122,7 @@ export function useDraftNotifications(seasonId: string, userId: string) {
         body,
         tag: `draft-${seasonId}`,
       });
-      n.onclick = () => window.focus();
+      n.addEventListener("click", () => window.focus());
     },
     [enabled, seasonId]
   );

app/routes/admin.data-sync.tsx

@@ -139,14 +139,14 @@ export default function DataSync({ loaderData }: Route.ComponentProps) {
     }
 
     const reader = new FileReader();
-    reader.onload = (event) => {
+    reader.addEventListener("load", (event) => {
       const fileData = event.target?.result as string;
       const formData = new FormData();
       formData.append("intent", "import");
       formData.append("mode", importMode);
       formData.append("fileData", fileData);
       fetcher.submit(formData, { method: "POST" });
-    };
+    });
     reader.readAsText(selectedFile);
   };
 

cypress/support/e2e.ts

@@ -19,4 +19,3 @@ declare global {
   }
 }
 
-export {};