feat(sync): Phase 2 — surface adopted/error counts in sync-updated event

Autonomous decisions:
- Always emit numeric adopted_count/error_count (0 when none) — simpler than conditional JSON omission and frontend already guards with > 0
- Use warning toast when error_count > 0, info when only adoptions — visually distinct from the all-failed syncFailed warning while still surfacing partial errors

Signed-off-by: crimsonsunset <jsangio1@gmail.com>

Author: crimsonsunset

apps/desktop/src-tauri/src/lib.rs

@@ -662,6 +662,8 @@ pub fn run() {
                                                 "added": result.added,
                                                 "updated": result.updated,
                                                 "removed": result.removed,
+                                                "adopted_count": result.adopted.len(),
+                                                "error_count": result.errors.len(),
                                             }),
                                         ) {
                                             warn!("[FileWatcher] Failed to emit event: {}", e);

apps/desktop/src/features/servers/ServersPage.tsx

@@ -519,8 +519,28 @@ export function ServersPage() {
         return;
       }
       void loadData();
+
+      const adoptedCount = payload.adopted_count ?? 0;
+      const errorCount = payload.error_count ?? 0;
+      if (adoptedCount > 0 || errorCount > 0) {
+        const detailParts: string[] = [];
+        if (adoptedCount > 0) {
+          detailParts.push(
+            t('configEditorModal.toast.syncPartialAdopted', { count: adoptedCount }),
+          );
+        }
+        if (errorCount > 0) {
+          detailParts.push(
+            t('configEditorModal.toast.syncPartialErrors', { count: errorCount }),
+          );
+        }
+        showToast(
+          `${t('configEditorModal.toast.syncPartialTitle')}: ${t('configEditorModal.toast.syncPartialBody', { detail: detailParts.join('; ') })}`,
+          errorCount > 0 ? 'warning' : 'info',
+        );
+      }
     });
-  }, [loadData, subscribe, viewSpace]);
+  }, [loadData, showToast, subscribe, t, viewSpace]);
 
   useEffect(() => {
     return subscribe('space-servers-sync-failed', (payload) => {

apps/desktop/src/lib/backend/events/useDomainEvents.ts

@@ -178,6 +178,8 @@ export interface MCPNotificationPayload extends DomainEventPayload {
 /** Space config file sync succeeded (desktop file watcher). */
 export interface SpaceServersUpdatedPayload extends DomainEventPayload {
   space_id: string;
+  adopted_count?: number;
+  error_count?: number;
 }
 
 /** Space config file sync failed (desktop file watcher). */

apps/desktop/src/locales/en/servers.json

@@ -251,7 +251,13 @@
       "invalidJsonTitle": "Invalid JSON",
       "saveFailed": "Failed to save configuration",
       "syncFailedTitle": "Config saved, sync failed",
-      "syncFailedBody": "{{message}} — JSON is on disk; fix the entry and save again."
+      "syncFailedBody": "{{message}} — JSON is on disk; fix the entry and save again.",
+      "syncPartialTitle": "Config synced",
+      "syncPartialBody": "{{detail}}",
+      "syncPartialAdopted_one": "{{count}} server took over an existing entry",
+      "syncPartialAdopted_other": "{{count}} servers took over existing entries",
+      "syncPartialErrors_one": "{{count}} server failed to sync",
+      "syncPartialErrors_other": "{{count}} servers failed to sync"
     },
     "validation": {
       "invalidJsonPrefix": "Invalid JSON:",