CommandMenuItem overridable entity (#21486)

## Context
Second PR of the overridable-entities track (after #21436 for views):
command menu items become overridable so that edits on non-owned items
are stored as overrides instead of mutating the row, and
deletion/deactivation becomes reversible.

 ## What this does

- `CommandMenuItemEntity` now extends
`OverridableEntity<CommandMenuItemOverrides>` (adds `isActive` +
`overrides`). All editable properties are overridable for now (to
discuss).
- **Update**: mutations on a command item not owned by the caller
(standard items) are written into `overrides`; reads merge them in the
DTO. The command palette edit mode (pin,
reorder, shortLabel) now preserves standard values, "Reset label to
default" gains true post-save semantics.
- **Delete**: protected items are deactivated (`isActive = false`)
instead of deleted; custom items still hard-delete.
- **Object deactivate/enable toggle**: now flips `isActive` on the
command item (merged into the main migration call) instead of
delete/recreate; a create-if-missing fallback covers legacy deactivated
objects.
- **Front**: inactive command items are filtered out of the palette
selector.


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---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/metadata-modules/object-metadata/object-metadata.service.ts

@@ -138,7 +138,7 @@ export class ObjectMetadataService extends TypeOrmQueryService<ObjectMetadataEnt
       isDefined(existingFlatObjectMetadata) &&
       existingFlatObjectMetadata.isActive;
 
-    const { commandMenuItemsToCreate, commandMenuItemsToDelete } =
+    const { commandMenuItemsToCreate, commandMenuItemsToUpdate } =
       this.computeCommandMenuItemChangesForActiveToggle({
         isBeingEnabled,
         isBeingDisabled,
@@ -175,6 +175,11 @@ export class ObjectMetadataService extends TypeOrmQueryService<ObjectMetadataEnt
               flatEntityToDelete: [],
               flatEntityToUpdate: flatViewFieldsToUpdate,
             },
+            commandMenuItem: {
+              flatEntityToCreate: [],
+              flatEntityToDelete: [],
+              flatEntityToUpdate: commandMenuItemsToUpdate,
+            },
           },
           workspaceId,
           isSystemBuild: false,
@@ -190,18 +195,14 @@ export class ObjectMetadataService extends TypeOrmQueryService<ObjectMetadataEnt
       );
     }
 
-    const hasCommandMenuItemChanges =
-      commandMenuItemsToCreate.length > 0 ||
-      commandMenuItemsToDelete.length > 0;
-
-    if (hasCommandMenuItemChanges) {
+    if (commandMenuItemsToCreate.length > 0) {
       const commandMenuItemMigrationResult =
         await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigration(
           {
             allFlatEntityOperationByMetadataName: {
               commandMenuItem: {
                 flatEntityToCreate: commandMenuItemsToCreate,
-                flatEntityToDelete: commandMenuItemsToDelete,
+                flatEntityToDelete: [],
                 flatEntityToUpdate: [],
               },
             },
@@ -919,12 +920,14 @@ export class ObjectMetadataService extends TypeOrmQueryService<ObjectMetadataEnt
     applicationId: string;
   }): {
     commandMenuItemsToCreate: FlatCommandMenuItem[];
-    commandMenuItemsToDelete: FlatCommandMenuItem[];
+    commandMenuItemsToUpdate: FlatCommandMenuItem[];
   } {
     if (!isDefined(existingFlatObjectMetadata)) {
-      return { commandMenuItemsToCreate: [], commandMenuItemsToDelete: [] };
+      return { commandMenuItemsToCreate: [], commandMenuItemsToUpdate: [] };
     }
 
+    const now = new Date().toISOString();
+
     if (isBeingEnabled) {
       const existingCommandMenuItem =
         this.findNavigationCommandMenuItemForObject({
@@ -943,28 +946,42 @@ export class ObjectMetadataService extends TypeOrmQueryService<ObjectMetadataEnt
               flatCommandMenuItemMaps,
             }),
           ],
-          commandMenuItemsToDelete: [],
+          commandMenuItemsToUpdate: [],
+        };
+      }
+
+      if (!existingCommandMenuItem.isActive) {
+        return {
+          commandMenuItemsToCreate: [],
+          commandMenuItemsToUpdate: [
+            { ...existingCommandMenuItem, isActive: true, updatedAt: now },
+          ],
         };
       }
     }
 
     if (isBeingDisabled) {
-      const commandMenuItemToDelete =
+      const commandMenuItemToDeactivate =
         this.findNavigationCommandMenuItemForObject({
           objectUniversalIdentifier:
             existingFlatObjectMetadata.universalIdentifier,
           flatCommandMenuItemMaps,
         });
 
-      if (isDefined(commandMenuItemToDelete)) {
+      if (
+        isDefined(commandMenuItemToDeactivate) &&
+        commandMenuItemToDeactivate.isActive
+      ) {
         return {
           commandMenuItemsToCreate: [],
-          commandMenuItemsToDelete: [commandMenuItemToDelete],
+          commandMenuItemsToUpdate: [
+            { ...commandMenuItemToDeactivate, isActive: false, updatedAt: now },
+          ],
         };
       }
     }
 
-    return { commandMenuItemsToCreate: [], commandMenuItemsToDelete: [] };
+    return { commandMenuItemsToCreate: [], commandMenuItemsToUpdate: [] };
   }
 
   public async findOneWithinWorkspace(