fix: Allow empty eventHooks/ntfyEndpoints to reconcile from server

Remove the `length > 0` guards in fast-hydrate reconciliation that
prevented intentional empty-array clears from syncing across clients.
Server-side wipe protection (`__allowEmpty*` escape hatches) already
ensures empty arrays in the server are intentional.

Addresses PR #831 review feedback from CodeRabbit and Gemini.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/ui/src/lib/http-api-client.ts

@@ -2763,6 +2763,21 @@ export class HttpApiClient implements ElectronAPI {
           headers?: Record<string, string>;
           enabled?: boolean;
         }>;
+        eventHooks?: Array<{
+          id: string;
+          trigger: string;
+          enabled: boolean;
+          action: Record<string, unknown>;
+          name?: string;
+        }>;
+        ntfyEndpoints?: Array<{
+          id: string;
+          name: string;
+          serverUrl: string;
+          topic: string;
+          authType: string;
+          enabled: boolean;
+        }>;
       };
       error?: string;
     }> => this.get('/api/settings/global'),

apps/ui/src/routes/__root.tsx

@@ -600,10 +600,7 @@ function RootLayoutContent() {
                   // so updating them won't cause a visible re-render flash.
                   const serverHooks = (finalSettings as GlobalSettings).eventHooks ?? [];
                   const currentHooks = useAppStore.getState().eventHooks;
-                  if (
-                    JSON.stringify(serverHooks) !== JSON.stringify(currentHooks) &&
-                    serverHooks.length > 0
-                  ) {
+                  if (JSON.stringify(serverHooks) !== JSON.stringify(currentHooks)) {
                     logger.info(
                       `[FAST_HYDRATE] Reconciling eventHooks from server (server=${serverHooks.length}, store=${currentHooks.length})`
                     );

apps/ui/src/store/app-store.ts

@@ -1506,7 +1506,11 @@ export const useAppStore = create<AppState & AppActions>()((set, get) => ({
     set({ eventHooks: hooks });
     try {
       const httpApi = getHttpApiClient();
-      await httpApi.settings.updateGlobal({ eventHooks: hooks });
+      await httpApi.settings.updateGlobal({
+        eventHooks: hooks,
+        // Signal the server that an empty array is intentional (not a wipe from stale state)
+        ...(hooks.length === 0 ? { __allowEmptyEventHooks: true } : {}),
+      });
     } catch (error) {
       logger.error('Failed to sync event hooks:', error);
     }
@@ -1517,7 +1521,11 @@ export const useAppStore = create<AppState & AppActions>()((set, get) => ({
     set({ ntfyEndpoints: endpoints });
     try {
       const httpApi = getHttpApiClient();
-      await httpApi.settings.updateGlobal({ ntfyEndpoints: endpoints });
+      await httpApi.settings.updateGlobal({
+        ntfyEndpoints: endpoints,
+        // Signal the server that an empty array is intentional (not a wipe from stale state)
+        ...(endpoints.length === 0 ? { __allowEmptyNtfyEndpoints: true } : {}),
+      });
     } catch (error) {
       logger.error('Failed to sync ntfy endpoints:', error);
     }