Fixed relative date filter initalization (#12811)

This PR fixes problems with date filter : 
- Filter chip shows the label with plural, ex : `This weeks` 
- Using a relative filter now initializes to `This day`
- Switching between the different relative sub-operands (This, Past,
Next) now initializes with a value so we're never in an "empty" state.

packages/twenty-front/src/modules/views/view-filter-value/utils/computeVariableDateViewFilterValue.ts

@@ -7,4 +7,14 @@ export const computeVariableDateViewFilterValue = (
   direction: VariableDateViewFilterValueDirection,
   amount: number | undefined,
   unit: VariableDateViewFilterValueUnit,
-) => `${direction}_${amount?.toString()}_${unit}`;
+) => {
+  if (direction === 'THIS') {
+    return `THIS_1_${unit}`;
+  } else if (amount === undefined || amount <= 0) {
+    throw new Error(
+      'Amount must be defined and greater than 0 for relative date filters',
+    );
+  }
+
+  return `${direction}_${amount.toString()}_${unit}`;
+};