fix(ui): correct timezone handling in OmbiDatePipe

- Replace native Date constructor with date-fns parseISO for proper UTC parsing
- Use date-fns format function for consistent timezone conversion
- Add null check for input value
- Fix issue where request times were showing incorrect timezone offset

This fixes GitHub issue #5102 where request times were showing different times than the host machine.

src/Ombi/ClientApp/src/app/pipes/OmbiDatePipe.ts

@@ -1,5 +1,6 @@
 import { Pipe, PipeTransform } from "@angular/core";
 import { FormatPipe } from 'ngx-date-fns';
+import { parseISO, format } from 'date-fns';
 
 @Pipe({
     name: "ombiDate",
@@ -10,8 +11,16 @@ export class OmbiDatePipe implements PipeTransform  {
         private FormatPipe: FormatPipe,
       ) {}
 
-    public transform(value: string, format: string ) {
-        const date = new Date(value);
-        return this.FormatPipe.transform(date, format);
+    public transform(value: string, formatStr: string ) {
+        if (!value) {
+            return '';
+        }
+        
+        // Parse the ISO string as UTC
+        const utcDate = parseISO(value);
+        
+        // Format the date using date-fns format function
+        // This will automatically handle the UTC to local conversion
+        return format(utcDate, formatStr);
     }
 }