diff --git a/frontend/src/App.svelte b/frontend/src/App.svelte
index 04b5dc6..a3f17aa 100644
--- a/frontend/src/App.svelte
+++ b/frontend/src/App.svelte
@@ -148,6 +148,8 @@
   // ===== Sync state =====
   let syncStatus = null
   let syncLoading = false
+  let syncMessage = ''
+  let syncMessageKind = ''
 
   const tabs = [
     { id: 'overview', label: t('tab.overview') },
@@ -1431,15 +1433,35 @@
     showSettings = false
   }
 
+  function syncResultMessage(result) {
+    const conflicts = Array.isArray(result?.conflicts) ? result.conflicts : []
+    const applyErrors = Array.isArray(result?.applyErrors) ? result.applyErrors : []
+    const parts = []
+    if (conflicts.length > 0) {
+      parts.push(t('sync.conflictsCount', { count: conflicts.length }))
+    }
+    if (applyErrors.length > 0) {
+      parts.push(t('sync.applyErrorsCount', { count: applyErrors.length }))
+    }
+    return parts.join(' · ')
+  }
+
   async function runSyncNow() {
     syncLoading = true
+    syncMessage = ''
+    syncMessageKind = ''
     try {
-      await wailsCall('SyncNow')
+      const result = await wailsCall('SyncNow')
       await loadSyncStatus()
+      syncMessage = syncResultMessage(result)
+      syncMessageKind = syncMessage ? 'warning' : ''
     } catch (e) {
       console.error('sync error:', e)
+      syncMessage = `${t('sync.status.error')}: ${e?.message || e}`
+      syncMessageKind = 'warning'
+    } finally {
+      syncLoading = false
     }
-    syncLoading = false
   }
 
   // First run / recovery handlers
@@ -1521,7 +1543,7 @@
       </div>
     </nav>
     <div class="sidebar-footer">
-      <SyncStatus {syncStatus} {syncLoading} onSync={runSyncNow} onOpenSettings={() => openSettings('sync')} />
+      <SyncStatus {syncStatus} {syncLoading} {syncMessage} {syncMessageKind} onSync={runSyncNow} onOpenSettings={() => openSettings('sync')} />
       <div class="sidebar-footer-row">
         <button class="sidebar-settings-btn" on:click={() => openSettings()} title={t('common.settings')}>
           <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
diff --git a/frontend/src/lib/SyncStatus.svelte b/frontend/src/lib/SyncStatus.svelte
index 73dc9f1..818f689 100644
--- a/frontend/src/lib/SyncStatus.svelte
+++ b/frontend/src/lib/SyncStatus.svelte
@@ -3,6 +3,8 @@
 
   export let syncStatus = null
   export let syncLoading = false
+  export let syncMessage = ''
+  export let syncMessageKind = ''
   export let onSync = null
   export let onOpenSettings = null
 
@@ -41,6 +43,11 @@
         </button>
       </div>
     </div>
+    {#if syncMessage}
+      <div class={syncMessageKind === 'warning' ? 'sync-message sync-message-warning' : 'sync-message'}>
+        {syncMessage}
+      </div>
+    {/if}
   {:else}
     <div class="sync-status-row">
       <span class="sync-dot dot-disabled"></span>
@@ -88,6 +95,14 @@
     gap: 0.3rem;
     margin-left: auto;
   }
+  .sync-message {
+    margin-top: 0.25rem;
+    color: var(--text-dim, #888);
+    line-height: 1.25;
+  }
+  .sync-message-warning {
+    color: #f59e0b;
+  }
   .btn-xs {
     padding: 0.2rem 0.5rem;
     font-size: 0.75rem;
diff --git a/frontend/src/lib/i18n/locales/en.js b/frontend/src/lib/i18n/locales/en.js
index 1f7c2a6..5a0cab1 100644
--- a/frontend/src/lib/i18n/locales/en.js
+++ b/frontend/src/lib/i18n/locales/en.js
@@ -87,6 +87,9 @@ export default {
   'sync.connected': 'Connected',
   'sync.notConnected': 'Not connected',
   'sync.disabled': 'Disabled',
+  'sync.status.error': 'Sync error',
+  'sync.conflictsCount': 'Conflicts: {count}',
+  'sync.applyErrorsCount': 'Apply errors: {count}',
 
   'kind.project': 'Project',
   'kind.client': 'Client',
diff --git a/frontend/src/lib/i18n/locales/ru.js b/frontend/src/lib/i18n/locales/ru.js
index 73d9586..d6cb2ba 100644
--- a/frontend/src/lib/i18n/locales/ru.js
+++ b/frontend/src/lib/i18n/locales/ru.js
@@ -431,6 +431,8 @@ export default {
   'sync.retry': 'Повторить',
   'sync.run': 'Синхронизировать',
   'sync.running': 'Синхронизация...',
+  'sync.conflictsCount': 'Конфликты: {count}',
+  'sync.applyErrorsCount': 'Ошибки применения: {count}',
 
   'error.generic': 'Произошла ошибка',
   'error.invalidCredentials': 'Неверный логин или пароль',