Unchecked findIndex(-1) in board field visibility toggle causes TypeError

https://sonarly.com/issue/7338?type=bug

When toggling field visibility on a Kanban board, `Array.findIndex()` returns -1 because the field exists in `currentRecordFields` but not in `recordIndexFieldDefinitions`. Accessing `array[-1]` yields `undefined`, and setting `.isVisible` on it throws the TypeError.

Fix: Added bounds checks for `findIndex()` returning `-1` in two places in `useObjectOptionsForBoard.ts`:

1. **`handleReorderBoardFields`** (line 117): Guards against `findIndex` returning `-1` when reordering board fields. If the field isn't found in `recordIndexFieldDefinitions`, the `produce` callback returns early (immer returns the original array unchanged).

2. **`handleBoardFieldVisibilityChange`** (line 229): Guards against `findIndex` returning `-1` when toggling field visibility. Same early-return pattern.

Both `produce` callbacks now safely no-op when the field exists in `currentRecordFields` but not in `recordIndexFieldDefinitions`. This is correct because:
- The primary state updates (`updateRecordField`, `saveViewFields`) have already executed by this point
- `recordIndexFieldDefinitions` is explicitly transitional state (marked with `// TODO: remove after refactor`)
- Skipping the `recordIndexFieldDefinitions` update when the field isn't found is strictly better than crashing

packages/twenty-front/src/modules/object-record/object-options-dropdown/hooks/useObjectOptionsForBoard.ts

@@ -114,6 +114,10 @@ export const useObjectOptionsForBoard = ({
               updatedRecordField.fieldMetadataItemId,
           );
 
+          if (indexToModify === -1) {
+            return;
+          }
+
           draftRecordIndexFieldDefinitions[indexToModify].position =
             updatedRecordField.position;
         },
@@ -222,6 +226,10 @@ export const useObjectOptionsForBoard = ({
                 updatedRecordField.fieldMetadataItemId,
             );
 
+            if (indexToModify === -1) {
+              return;
+            }
+
             draftRecordIndexFieldDefinitions[indexToModify].isVisible =
               shouldShowFieldMetadataItem;
           },