feat: bump eslint & oxlint (#14452)

#### PR Dependency Tree


* **PR #14452** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Improved null-safety, dependency tracking, upload validation, and
error logging for more reliable uploads, clipboard, calendar linking,
telemetry, PDF/theme printing, and preview/zoom behavior.
* Tightened handling of all-day calendar events (missing date now
reported).

* **Deprecations**
  * Removed deprecated RadioButton and RadioButtonGroup; use RadioGroup.

* **Chores**
* Unified and upgraded linting/config, reorganized imports, and
standardized binary handling for more consistent builds and tooling.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/models/calendar-account.ts

@@ -110,10 +110,10 @@ export class CalendarAccountModel extends BaseModel {
       refreshIntervalMinutes: data.refreshIntervalMinutes,
     };
 
-    if (!!accessToken) {
+    if (accessToken) {
       updateData.accessToken = accessToken;
     }
-    if (!!refreshToken) {
+    if (refreshToken) {
       updateData.refreshToken = refreshToken;
     }
 

packages/backend/server/src/models/copilot-session.ts

@@ -117,7 +117,7 @@ export class CopilotSessionModel extends BaseModel {
     if (typeof value !== 'string') {
       return value;
     }
-    return value.replace(/\u0000/g, '') as T;
+    return value.replaceAll('\0', '') as T;
   }
 
   private sanitizeJsonValue<T>(value: T): T {