feat(machine) : single save button + link versioning display

- Replace auto-save-on-blur with single "Enregistrer" button
- Add Cancel button that resets local state
- Expose saveFieldDefinitions via defineExpose on MachineInfoCard
- Remove standalone save button from MachineCustomFieldDefEditor
- Add saveAllMachineCustomFields batch method
- Add submitEdition/cancelEdition/saving/canSubmit to orchestrator
- Show diff summary badges in version list entries
- Show link changes in restore modal description

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/composables/useMachineDetailUpdates.ts

@@ -208,9 +208,8 @@ export function useMachineDetailUpdates(deps: UseMachineDetailUpdatesDeps) {
     }
   }
 
-  const handleMachineConstructeurChange = async (value: unknown) => {
+  const handleMachineConstructeurChange = (value: unknown) => {
     machineConstructeurIds.value = uniqueConstructeurIds(value)
-    await updateMachineInfo()
   }
 
   const editComponent = () => {