fix: workspace member "me" filters now work in dashboard widgets (#20266)

## Summary

Fixes #20225

Dashboard graph widgets only passed `timeZone` in
`filterValueDependencies` when computing the GraphQL operation filter.
As a result, `isCurrentWorkspaceMemberSelected` ("me") filters were
silently ignored — the current workspace member ID was `undefined`.

Regular view filters already use `useFilterValueDependencies` which
provides both `timeZone` and `currentWorkspaceMemberId`. This PR
replaces the manual `{ timeZone: userTimezone }` object in
`useGraphWidgetQueryCommon` with `useFilterValueDependencies()`, giving
dashboard widgets full feature parity with view filters.

**Changed file:**
`packages/twenty-front/src/modules/page-layout/widgets/graph/hooks/useGraphWidgetQueryCommon.ts`

---------

Co-authored-by: martmull <martmull@hotmail.fr>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/twenty-front/src/modules/page-layout/widgets/graph/hooks/useGraphWidgetQueryCommon.ts

@@ -1,5 +1,5 @@
 import { useObjectMetadataItemById } from '@/object-metadata/hooks/useObjectMetadataItemById';
-import { useUserTimezone } from '@/ui/input/components/internal/date/hooks/useUserTimezone';
+import { useFilterValueDependencies } from '@/object-record/record-filter/hooks/useFilterValueDependencies';
 import {
   computeRecordGqlOperationFilter,
   isDefined,
@@ -36,13 +36,11 @@ export const useGraphWidgetQueryCommon = ({
     throw new Error('Aggregate field not found');
   }
 
-  const { userTimezone } = useUserTimezone();
+  const { filterValueDependencies } = useFilterValueDependencies();
 
   const gqlOperationFilter = computeRecordGqlOperationFilter({
     fields: objectMetadataItem.fields,
-    filterValueDependencies: {
-      timeZone: userTimezone,
-    },
+    filterValueDependencies,
     recordFilters: configuration.filter?.recordFilters ?? [],
     recordFilterGroups: configuration.filter?.recordFilterGroups ?? [],
   });