fix(campaign-ui): make discard restore server state

webui/src/features/campaigns/hooks/useCampaignDraftEditor.ts

@@ -12,7 +12,7 @@ type UseCampaignDraftEditorOptions = {
   campaignId: string;
   version: CampaignVersionDetail | null;
   locked: boolean;
-  reload: () => Promise<void>;
+  reload: (options?: {force?: boolean;}) => Promise<void>;
   setError: (message: string) => void;
   currentStep: StepValue;
   currentFlow?: string;
@@ -124,12 +124,25 @@ export function useCampaignDraftEditor({
     }
   }, [campaignId, currentFlow, currentStep, draft, extraPayload, isComplete, locked, onSaved, reload, setError, settings, version, workflowState]);
 
+  const discardDraft = useCallback(async () => {
+    if (version) {
+      const initialDraft = ensureCampaignDraft(version);
+      const loadedDraft = transformLoadedDraftRef.current?.(version, initialDraft) ?? initialDraft;
+      setDraft(loadedDraft);
+      setDirty(false);
+      setLocalError("");
+      setSaveState(loadedLabelRef.current(version));
+      onLoadedRef.current?.(version, loadedDraft);
+    }
+    await reload({ force: true });
+  }, [reload, version]);
+
   const unsavedRegistration = useMemo(() => dirty && !locked ? {
     title: unsavedTitle,
     message: unsavedMessage,
     onSave: () => saveDraft("manual"),
-    onDiscard: () => setDirty(false)
-  } : null, [dirty, locked, saveDraft, unsavedMessage, unsavedTitle]);
+    onDiscard: () => { void discardDraft(); }
+  } : null, [dirty, discardDraft, locked, saveDraft, unsavedMessage, unsavedTitle]);
 
   useRegisterCampaignUnsavedChanges(unsavedRegistration);
 
@@ -145,6 +158,7 @@ export function useCampaignDraftEditor({
     setLocalError,
     patch,
     markDirty,
+    discardDraft,
     saveDraft
   };
-}
+}