Wire fields widget to backend + basic edition (#17965)

Closes https://github.com/twentyhq/core-team-issues/issues/2215
Closes https://github.com/twentyhq/core-team-issues/issues/2216
Closes https://github.com/twentyhq/core-team-issues/issues/2218

## Fields widget edition demo


https://github.com/user-attachments/assets/08626d70-8fcb-4ae2-9222-10ef57e75f90

## Dashboards still work


https://github.com/user-attachments/assets/aa9a9c45-a0a2-481e-b132-bc52254778da

packages/twenty-front/src/modules/page-layout/utils/convertPageLayoutDraftToUpdateInput.ts

@@ -1,4 +1,5 @@
 import { type DraftPageLayout } from '@/page-layout/types/DraftPageLayout';
+import { isDynamicRelationWidget } from '@/page-layout/utils/isDynamicRelationWidget';
 import { type UpdatePageLayoutWithTabsInput } from '~/generated-metadata/graphql';
 
 export const convertPageLayoutDraftToUpdateInput = (
@@ -12,20 +13,22 @@ export const convertPageLayoutDraftToUpdateInput = (
       id: tab.id,
       title: tab.title,
       position: tab.position,
-      widgets: tab.widgets.map((widget) => ({
-        id: widget.id,
-        pageLayoutTabId: widget.pageLayoutTabId,
-        title: widget.title,
-        type: widget.type,
-        objectMetadataId: widget.objectMetadataId ?? null,
-        gridPosition: {
-          row: widget.gridPosition.row,
-          column: widget.gridPosition.column,
-          rowSpan: widget.gridPosition.rowSpan,
-          columnSpan: widget.gridPosition.columnSpan,
-        },
-        configuration: widget.configuration ?? null,
-      })),
+      widgets: tab.widgets
+        .filter((widget) => !isDynamicRelationWidget(widget))
+        .map((widget) => ({
+          id: widget.id,
+          pageLayoutTabId: widget.pageLayoutTabId,
+          title: widget.title,
+          type: widget.type,
+          objectMetadataId: widget.objectMetadataId ?? null,
+          gridPosition: {
+            row: widget.gridPosition.row,
+            column: widget.gridPosition.column,
+            rowSpan: widget.gridPosition.rowSpan,
+            columnSpan: widget.gridPosition.columnSpan,
+          },
+          configuration: widget.configuration ?? null,
+        })),
     })),
   };
 };