diff --git a/plugins/activity/frontend/src/index.js b/plugins/activity/frontend/src/index.js
index e7abeec..27b1e3f 100644
--- a/plugins/activity/frontend/src/index.js
+++ b/plugins/activity/frontend/src/index.js
@@ -563,6 +563,14 @@
     var disposed = false;
     var unsubscribers = [];
 
+    function reportError(key, fallback, err) {
+      if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+        console.warn('[verstak.activity] ' + key, err);
+      }
+      statusText = tr(key, null, fallback);
+      statusClass = 'error';
+    }
+
     var toolbar = el('div', { className: 'activity-toolbar' });
     var titleEl = el('span', { className: 'activity-title', textContent: scope.mode === 'global' ? tr('ui.title', null, 'Activity') : tr('ui.workspaceTitle', { workspace: scope.label }, 'Activity · ' + scope.label) });
     var countEl = el('span', { className: 'activity-count' });
@@ -634,8 +642,7 @@
         ? events.filter(function (item) { return !item._storageKey || item._storageKey === GLOBAL_KEY; })
         : events;
       return api.settings.write(scope.key, storageEvents(toStore)).then(persistSessionRegistry).then(persistCandidateCaches).catch(function (err) {
-        statusText = tr('ui.saveError', { error: err && err.message ? err.message : String(err) }, 'Could not save activity: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.saveError', 'Could not save activity. Please try again.', err);
       });
     }
 
@@ -668,8 +675,7 @@
         statusText = tr('ui.cleared', null, 'Activity cleared');
         statusClass = '';
       }).catch(function (err) {
-        statusText = tr('ui.clearError', { error: err && err.message ? err.message : String(err) }, 'Could not clear activity: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.clearError', 'Could not clear activity. Please try again.', err);
       });
     }
 
@@ -797,8 +803,7 @@
         statusText = tr('ui.dismissed', null, 'Candidate dismissed');
         statusClass = '';
       }).catch(function (err) {
-        statusText = 'Could not dismiss candidate: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.dismissError', 'Could not dismiss the suggestion. Please try again.', err);
       }).then(render);
     }
 
@@ -870,8 +875,7 @@
         updateCandidates();
         return persistSessionRegistry().then(persistCandidateCaches);
       }).catch(function (err) {
-        statusText = 'Could not load activity: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.loadError', 'Could not load activity. Please try again.', err);
       });
     }
 
@@ -898,8 +902,7 @@
       return api.commands.register(WORKLOG_COMMAND_ID, listWorkSessionCandidates).then(function (unregister) {
         if (typeof unregister === 'function') unsubscribers.push(unregister);
       }).catch(function (err) {
-        statusText = 'Activity commands unavailable: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.commandsUnavailable', 'Activity actions are unavailable. Please try again.', err);
       });
     }
 
@@ -917,8 +920,7 @@
         statusText = scope.mode === 'global' ? 'Listening for all activity' : 'Listening for workspace activity';
         statusClass = '';
       }).catch(function (err) {
-        statusText = 'Activity subscriptions unavailable: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.subscriptionsUnavailable', 'Activity updates are unavailable. Please try again.', err);
       });
     }
 
diff --git a/plugins/activity/locales/en.json b/plugins/activity/locales/en.json
index 2dd6ad1..05f4baa 100644
--- a/plugins/activity/locales/en.json
+++ b/plugins/activity/locales/en.json
@@ -14,9 +14,13 @@
   "ui.clearWorkspaceWarning": "This permanently deletes recorded activity for {workspace}. Activity in other cases remains.",
   "ui.confirmClear": "Clear activity",
   "ui.cancel": "Cancel",
-  "ui.saveError": "Could not save activity: {error}",
+  "ui.saveError": "Could not save activity. Please try again.",
   "ui.cleared": "Activity cleared",
-  "ui.clearError": "Could not clear activity: {error}",
+  "ui.clearError": "Could not clear activity. Please try again.",
+  "ui.dismissError": "Could not dismiss the suggestion. Please try again.",
+  "ui.loadError": "Could not load activity. Please try again.",
+  "ui.commandsUnavailable": "Activity actions are unavailable. Please try again.",
+  "ui.subscriptionsUnavailable": "Activity updates are unavailable. Please try again.",
   "ui.empty": "No activity events yet",
   "ui.emptyHint": "File changes, browser captures, and conversions will appear here.",
   "ui.details": "Details",
diff --git a/plugins/activity/locales/ru.json b/plugins/activity/locales/ru.json
index d2d6db4..e1d4f7d 100644
--- a/plugins/activity/locales/ru.json
+++ b/plugins/activity/locales/ru.json
@@ -14,9 +14,13 @@
   "ui.clearWorkspaceWarning": "Будет безвозвратно удалена записанная активность Дела «{workspace}». Активность других Дел останется.",
   "ui.confirmClear": "Очистить активность",
   "ui.cancel": "Отмена",
-  "ui.saveError": "Не удалось сохранить активность: {error}",
+  "ui.saveError": "Не удалось сохранить активность. Повторите попытку.",
   "ui.cleared": "Активность очищена",
-  "ui.clearError": "Не удалось очистить активность: {error}",
+  "ui.clearError": "Не удалось очистить активность. Повторите попытку.",
+  "ui.dismissError": "Не удалось отклонить предложение. Повторите попытку.",
+  "ui.loadError": "Не удалось загрузить активность. Повторите попытку.",
+  "ui.commandsUnavailable": "Действия с активностью недоступны. Повторите попытку.",
+  "ui.subscriptionsUnavailable": "Обновления активности недоступны. Повторите попытку.",
   "ui.empty": "Событий активности пока нет",
   "ui.emptyHint": "Здесь появятся изменения файлов, материалы из браузера и преобразования.",
   "ui.details": "Подробнее",
diff --git a/plugins/browser-inbox/frontend/src/index.js b/plugins/browser-inbox/frontend/src/index.js
index 423a773..be1699d 100644
--- a/plugins/browser-inbox/frontend/src/index.js
+++ b/plugins/browser-inbox/frontend/src/index.js
@@ -376,6 +376,16 @@
       if (api && api.i18n && typeof api.i18n.t === 'function') return api.i18n.t(key, params, fallback);
       return fallback || key;
     }
+
+    function reportError(key, fallback, err) {
+      if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+        console.warn('[verstak.browser-inbox] ' + key, err);
+      }
+      statusText = tr(key, null, fallback);
+      statusClass = 'error';
+      render();
+    }
+
     statusText = tr('ui.connecting', null, 'Connecting to receiver events...');
 
     var toolbar = el('div', { className: 'browser-inbox-toolbar' });
@@ -496,9 +506,7 @@
 
     function publishMutation(action, payload, verify, verifySettings) {
       if (!api || !api.events || typeof api.events.publish !== 'function') {
-        statusText = 'Could not save inbox: events API unavailable';
-        statusClass = 'error';
-        render();
+        reportError('ui.saveError', 'Could not update the browser inbox. Please try again.');
         return Promise.resolve(false);
       }
       return api.events.publish(MUTATION_EVENT, Object.assign({ action: action }, payload || {})).then(function () {
@@ -516,9 +524,7 @@
         }
         return true;
       }).catch(function (err) {
-        statusText = 'Could not save inbox: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
-        render();
+        reportError('ui.saveError', 'Could not update the browser inbox. Please try again.', err);
         return false;
       });
     }
@@ -646,9 +652,7 @@
     function createNoteFromCapture(capture) {
       if (!capture || !capture.workspaceRootPath) return Promise.resolve();
       if (!api || !api.files || typeof api.files.writeText !== 'function') {
-        statusText = 'Could not create note: files API unavailable';
-        statusClass = 'error';
-        render();
+        reportError('ui.createNoteError', 'Could not create the note. Please try again.');
         return Promise.resolve();
       }
       var title = noteTitle(capture);
@@ -677,18 +681,14 @@
         statusClass = '';
         return archiveCapture(capture.captureId);
       }).catch(function (err) {
-        statusText = 'Could not create note: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
-        render();
+        reportError('ui.createNoteError', 'Could not create the note. Please try again.', err);
       });
     }
 
     function createLinkFromCapture(capture) {
       if (!capture || !capture.workspaceRootPath || !capture.url) return Promise.resolve();
       if (!api || !api.files || typeof api.files.writeText !== 'function') {
-        statusText = 'Could not create link: files API unavailable';
-        statusClass = 'error';
-        render();
+        reportError('ui.createLinkError', 'Could not create the link. Please try again.');
         return Promise.resolve();
       }
       var title = noteTitle(capture);
@@ -729,27 +729,21 @@
         statusClass = '';
         return archiveCapture(capture.captureId);
       }).catch(function (err) {
-        statusText = 'Could not create link: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
-        render();
+        reportError('ui.createLinkError', 'Could not create the link. Please try again.', err);
       });
     }
 
     function openCaptureURL(capture) {
       if (!capture || !capture.url || !api || !api.files || typeof api.files.openURL !== 'function') return Promise.resolve();
       return api.files.openURL(capture.url).catch(function (err) {
-        statusText = 'Could not open link: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
-        render();
+        reportError('ui.openLinkError', 'Could not open the link. Please try again.', err);
       });
     }
 
     function createFileFromCapture(capture) {
       if (!capture || !capture.workspaceRootPath || capture.kind !== 'file' || !capture.fileName || (!capture.fileText && !capture.fileDataBase64)) return Promise.resolve();
       if (!api || !api.files || (capture.fileDataBase64 ? typeof api.files.writeBytes !== 'function' : typeof api.files.writeText !== 'function')) {
-        statusText = 'Could not create file: files API unavailable';
-        statusClass = 'error';
-        render();
+        reportError('ui.createFileError', 'Could not create the file. Please try again.');
         return Promise.resolve();
       }
       var fileName = safeFileFilename(capture.fileName);
@@ -785,9 +779,7 @@
         statusClass = '';
         return archiveCapture(capture.captureId);
       }).catch(function (err) {
-        statusText = 'Could not create file: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
-        render();
+        reportError('ui.createFileError', 'Could not create the file. Please try again.', err);
       });
     }
 
@@ -1034,8 +1026,7 @@
           });
         });
       }).catch(function (err) {
-        statusText = 'Could not load inbox: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.loadError', 'Could not load the browser inbox. Please try again.', err);
       });
     }
 
@@ -1093,8 +1084,7 @@
         statusText = scope.mode === 'global' ? 'Receiver ready for all workspaces' : 'Receiver ready for workspace';
         statusClass = '';
       }).catch(function (err) {
-        statusText = 'Receiver unavailable: ' + (err && err.message ? err.message : String(err));
-        statusClass = 'error';
+        reportError('ui.receiverError', 'The browser receiver is unavailable. Please try again.', err);
       });
     }
 
@@ -1201,6 +1191,13 @@
         statusEl.className = 'browser-inbox-settings-status' + (isError ? ' error' : '');
       }
 
+      function reportError(key, fallback, err) {
+        if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+          console.warn('[verstak.browser-inbox.settings] ' + key, err);
+        }
+        setStatus(tr(key, null, fallback), true);
+      }
+
       function setBusy(busy) {
         copyURLButton.disabled = busy;
         copyTokenButton.disabled = busy;
@@ -1226,7 +1223,7 @@
           applyPairing(pairing);
           setStatus('', false);
         }).catch(function (err) {
-          setStatus(text(err && err.message ? err.message : err), true);
+          reportError('ui.pairingLoadError', 'Could not load browser connection settings. Please try again.', err);
         }).then(function () {
           setBusy(false);
         });
@@ -1241,7 +1238,7 @@
         navigator.clipboard.writeText(value).then(function () {
           setStatus(tr('ui.copied', { label: label }, '{label} copied'), false);
         }).catch(function (err) {
-          setStatus(text(err && err.message ? err.message : err), true);
+          reportError('ui.clipboardError', 'Could not copy to the clipboard. Please try again.', err);
         });
       }
 
@@ -1261,7 +1258,7 @@
           applyPairing(pairing);
           setStatus(tr('ui.tokenRotated', null, 'Token rotated'), false);
         }).catch(function (err) {
-          setStatus(text(err && err.message ? err.message : err), true);
+          reportError('ui.tokenRotateError', 'Could not rotate the pairing token. Please try again.', err);
         }).then(function () {
           setBusy(false);
         });
diff --git a/plugins/browser-inbox/locales/en.json b/plugins/browser-inbox/locales/en.json
index 84456c6..4e4d1d6 100644
--- a/plugins/browser-inbox/locales/en.json
+++ b/plugins/browser-inbox/locales/en.json
@@ -35,5 +35,15 @@
   "ui.copied": "{label} copied",
   "ui.rotateConfirm": "Rotate pairing token?",
   "ui.rotating": "Rotating...",
-  "ui.tokenRotated": "Token rotated"
+  "ui.tokenRotated": "Token rotated",
+  "ui.saveError": "Could not update the browser inbox. Please try again.",
+  "ui.createNoteError": "Could not create the note. Please try again.",
+  "ui.createLinkError": "Could not create the link. Please try again.",
+  "ui.openLinkError": "Could not open the link. Please try again.",
+  "ui.createFileError": "Could not create the file. Please try again.",
+  "ui.loadError": "Could not load the browser inbox. Please try again.",
+  "ui.receiverError": "The browser receiver is unavailable. Please try again.",
+  "ui.pairingLoadError": "Could not load browser connection settings. Please try again.",
+  "ui.clipboardError": "Could not copy to the clipboard. Please try again.",
+  "ui.tokenRotateError": "Could not rotate the pairing token. Please try again."
 }
diff --git a/plugins/browser-inbox/locales/ru.json b/plugins/browser-inbox/locales/ru.json
index 3cb6de2..7f0abbd 100644
--- a/plugins/browser-inbox/locales/ru.json
+++ b/plugins/browser-inbox/locales/ru.json
@@ -35,5 +35,15 @@
   "ui.copied": "{label} скопирован",
   "ui.rotateConfirm": "Сменить токен сопряжения?",
   "ui.rotating": "Смена токена...",
-  "ui.tokenRotated": "Токен изменён"
+  "ui.tokenRotated": "Токен изменён",
+  "ui.saveError": "Не удалось обновить входящие из браузера. Повторите попытку.",
+  "ui.createNoteError": "Не удалось создать заметку. Повторите попытку.",
+  "ui.createLinkError": "Не удалось создать ссылку. Повторите попытку.",
+  "ui.openLinkError": "Не удалось открыть ссылку. Повторите попытку.",
+  "ui.createFileError": "Не удалось создать файл. Повторите попытку.",
+  "ui.loadError": "Не удалось загрузить входящие из браузера. Повторите попытку.",
+  "ui.receiverError": "Приёмник браузера недоступен. Повторите попытку.",
+  "ui.pairingLoadError": "Не удалось загрузить параметры подключения браузера. Повторите попытку.",
+  "ui.clipboardError": "Не удалось скопировать в буфер обмена. Повторите попытку.",
+  "ui.tokenRotateError": "Не удалось сменить токен сопряжения. Повторите попытку."
 }
diff --git a/plugins/default-editor/frontend/src/index.js b/plugins/default-editor/frontend/src/index.js
index 806d528..bc3c0db 100644
--- a/plugins/default-editor/frontend/src/index.js
+++ b/plugins/default-editor/frontend/src/index.js
@@ -495,10 +495,10 @@
           rebuildEditorArea();
         }).catch(function (err) {
           if (disposed) return;
+          console.warn('[default-editor] load error:', err);
           editorWrap.innerHTML = '';
           editorWrap.appendChild(el('div', { className: 'de-error' }, [
-            el('div', {}, [tr('ui.loadFailed', null, 'Failed to load file')]),
-            el('div', { className: 'de-error-msg' }, [(err && err.message) ? err.message : String(err)])
+            el('div', {}, [tr('ui.loadFailed', null, 'Could not load the file. Please try again.')])
           ]));
         });
       }
diff --git a/plugins/default-editor/locales/en.json b/plugins/default-editor/locales/en.json
index 4729b54..3e5dc19 100644
--- a/plugins/default-editor/locales/en.json
+++ b/plugins/default-editor/locales/en.json
@@ -18,5 +18,5 @@
   "ui.saved": "Saved",
   "ui.discardConfirm": "Discard unsaved changes and reload from disk?",
   "ui.loading": "Loading...",
-  "ui.loadFailed": "Failed to load file"
+  "ui.loadFailed": "Could not load the file. Please try again."
 }
diff --git a/plugins/default-editor/locales/ru.json b/plugins/default-editor/locales/ru.json
index 984a52c..48a58ce 100644
--- a/plugins/default-editor/locales/ru.json
+++ b/plugins/default-editor/locales/ru.json
@@ -18,5 +18,5 @@
   "ui.saved": "Сохранено",
   "ui.discardConfirm": "Отменить несохранённые изменения и перечитать файл с диска?",
   "ui.loading": "Загрузка...",
-  "ui.loadFailed": "Не удалось загрузить файл"
+  "ui.loadFailed": "Не удалось загрузить файл. Повторите попытку."
 }
diff --git a/plugins/file-preview/frontend/src/index.js b/plugins/file-preview/frontend/src/index.js
index 7ac52c5..4003b57 100644
--- a/plugins/file-preview/frontend/src/index.js
+++ b/plugins/file-preview/frontend/src/index.js
@@ -143,8 +143,9 @@
           return null;
         });
       }).catch(function (err) {
+        console.warn('[file-preview] preview error:', err);
         body.className = 'fp-error';
-        body.textContent = tr('ui.error', { error: err && err.message ? err.message : String(err) }, 'Preview error: ' + (err && err.message ? err.message : String(err)));
+        body.textContent = tr('ui.error', null, 'Could not preview this file. Please try again.');
       });
       if (api.i18n && typeof api.i18n.onDidChangeLocale === 'function') {
         api.i18n.onDidChangeLocale(function () {
diff --git a/plugins/file-preview/locales/en.json b/plugins/file-preview/locales/en.json
index d291af8..5f2ce08 100644
--- a/plugins/file-preview/locales/en.json
+++ b/plugins/file-preview/locales/en.json
@@ -5,5 +5,5 @@
   "ui.openExternal": "Open External",
   "ui.preview": "Preview",
   "ui.loading": "Loading...",
-  "ui.error": "Preview error: {error}"
+  "ui.error": "Could not preview this file. Please try again."
 }
diff --git a/plugins/file-preview/locales/ru.json b/plugins/file-preview/locales/ru.json
index 0f1596e..a38ad56 100644
--- a/plugins/file-preview/locales/ru.json
+++ b/plugins/file-preview/locales/ru.json
@@ -5,5 +5,5 @@
   "ui.openExternal": "Открыть во внешнем приложении",
   "ui.preview": "Просмотр",
   "ui.loading": "Загрузка...",
-  "ui.error": "Ошибка просмотра: {error}"
+  "ui.error": "Не удалось открыть предварительный просмотр файла. Повторите попытку."
 }
diff --git a/plugins/files/frontend/src/index.js b/plugins/files/frontend/src/index.js
index 09c692d..2d6f7d9 100644
--- a/plugins/files/frontend/src/index.js
+++ b/plugins/files/frontend/src/index.js
@@ -320,14 +320,14 @@
     return Promise.reject(new Error('clipboard unavailable'));
   }
 
-  function showExternalFallback(entry, mode, reason) {
+  function showExternalFallback(entry, mode) {
     if (!entry) return;
     var pathToShow = entry.relativePath;
     if (mode === 'explorer' && entry.type !== 'folder') {
       pathToShow = parentPath(entry.relativePath) || entry.relativePath;
     }
     var title = mode === 'explorer' ? 'Show in Explorer' : 'Open External';
-    var message = title + ' failed.\n' + (reason ? String(reason) + '\n' : '') + 'Vault-relative path:\n' + pathToShow;
+    var message = title + ' failed.\nVault-relative path:\n' + pathToShow;
     confirmModal(message, { confirmText: 'Copy Path', cancelText: 'Close' }).then(function (copy) {
       if (!copy) return;
       copyTextToClipboard(pathToShow).catch(function (err) {
@@ -374,6 +374,13 @@
         return fallback || key;
       }
 
+      function reportError(key, fallback, err) {
+        if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+          console.warn('[verstak.files] ' + key, err);
+        }
+        return tr(key, null, fallback);
+      }
+
       function scopedPath(local) {
         local = cleanPath(local);
         return workspaceRoot ? (local ? workspaceRoot + '/' + local : workspaceRoot) : local;
@@ -714,10 +721,10 @@
           renderList();
         }).catch(function (err) {
           if (disposed) return;
+          console.warn('[verstak.files] load error:', err);
           listContainer.innerHTML = '';
           listContainer.appendChild(el('div', { className: 'files-error' }, [
-            el('div', {}, [tr('ui.loadFailed', null, 'Failed to load files')]),
-            el('div', { className: 'files-error-msg' }, [(err && err.message) ? err.message : String(err)])
+            el('div', {}, [tr('ui.loadFailed', null, 'Could not load files. Please try again.')])
           ]));
         });
       }
@@ -863,7 +870,7 @@
             api.workbench.openResource({ kind: 'vault-file', path: full, mode: 'edit', extension: ext ? '.' + ext : '', context: { sourcePluginId: 'verstak.files', sourceView: 'files' } }).catch(function () {});
           }
         }).catch(function (err) {
-          setCreateError('Error: ' + ((err && err.message) ? err.message : String(err)));
+          setCreateError(reportError('ui.createError', 'Could not create this item. Please try again.', err));
         });
       }
 
@@ -923,7 +930,7 @@
               setRenameError('A file with that name already exists');
               return;
             }
-            setRenameError('Error: ' + ((err && err.message) ? err.message : String(err)));
+            setRenameError(reportError('ui.renameError', 'Could not rename this item. Please try again.', err));
           });
         });
       }
@@ -935,7 +942,9 @@
             if (!ok) return;
             api.files.trash(entry.relativePath).then(function () {
               loadEntries();
-            }).catch(function (err) { window.alert((err && err.message) ? err.message : String(err)); });
+            }).catch(function (err) {
+              window.alert(reportError('ui.trashError', 'Could not move this item to trash. Please try again.', err));
+            });
           });
         } else if (count > 1) {
           confirmModal('Move ' + count + ' items to trash?', { danger: true }).then(function (ok) {
@@ -994,11 +1003,12 @@
         var filesApi = api && api.files;
         var action = mode === 'explorer' ? filesApi && filesApi.showInFolder : filesApi && filesApi.openExternal;
         if (typeof action !== 'function') {
-          showExternalFallback(entry, mode, 'files external-open API is unavailable.');
+          showExternalFallback(entry, mode);
           return;
         }
         action(entry.relativePath).catch(function (err) {
-          showExternalFallback(entry, mode, err && err.message ? err.message : err);
+          console.warn('[verstak.files] external open error:', err);
+          showExternalFallback(entry, mode);
         });
       }
 
diff --git a/plugins/files/locales/en.json b/plugins/files/locales/en.json
index dc8ff8a..c8f900d 100644
--- a/plugins/files/locales/en.json
+++ b/plugins/files/locales/en.json
@@ -28,5 +28,8 @@
   "ui.noMatches": "No matches",
   "ui.clearFilter": "Clear filter",
   "ui.loading": "Loading...",
-  "ui.loadFailed": "Failed to load files"
+  "ui.loadFailed": "Could not load files. Please try again.",
+  "ui.createError": "Could not create this item. Please try again.",
+  "ui.renameError": "Could not rename this item. Please try again.",
+  "ui.trashError": "Could not move this item to trash. Please try again."
 }
diff --git a/plugins/files/locales/ru.json b/plugins/files/locales/ru.json
index 15dea45..099a4f0 100644
--- a/plugins/files/locales/ru.json
+++ b/plugins/files/locales/ru.json
@@ -28,5 +28,8 @@
   "ui.noMatches": "Совпадений нет",
   "ui.clearFilter": "Сбросить фильтр",
   "ui.loading": "Загрузка...",
-  "ui.loadFailed": "Не удалось загрузить файлы"
+  "ui.loadFailed": "Не удалось загрузить файлы. Повторите попытку.",
+  "ui.createError": "Не удалось создать этот элемент. Повторите попытку.",
+  "ui.renameError": "Не удалось переименовать этот элемент. Повторите попытку.",
+  "ui.trashError": "Не удалось переместить элемент в корзину. Повторите попытку."
 }
diff --git a/plugins/journal/frontend/src/index.js b/plugins/journal/frontend/src/index.js
index 933b817..aaa6e58 100644
--- a/plugins/journal/frontend/src/index.js
+++ b/plugins/journal/frontend/src/index.js
@@ -285,6 +285,14 @@
     var statusClass = '';
     var modalHost = el('div', { className: 'journal-modal-host', hidden: 'hidden' });
 
+    function reportError(key, fallback, err) {
+      if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+        console.warn('[verstak.journal] ' + key, err);
+      }
+      statusText = tr(key, null, fallback);
+      statusClass = 'error';
+    }
+
     var toolbar = el('div', { className: 'journal-toolbar' });
     var titleEl = el('span', { className: 'journal-title', textContent: scope.mode === 'global' ? tr('ui.title', null, 'Journal') : tr('ui.workspaceTitle', { workspace: scope.label }, 'Journal · ' + scope.label) });
     var countEl = el('span', { className: 'journal-count' });
@@ -311,8 +319,7 @@
       var target = cleanWorkspace(workspaceRoot || scope.workspaceRoot);
       if (!target) return Promise.resolve();
       return api.settings.write(WORKLOG_PREFIX + encodeKey(target), storageEntries(values || entries)).catch(function (err) {
-        statusText = tr('ui.saveError', { error: err && err.message ? err.message : String(err) }, 'Could not save journal: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.saveError', 'Could not save journal. Please try again.', err);
       });
     }
 
@@ -339,8 +346,7 @@
           statusText = tr('ui.aggregating', null, 'Aggregating worklogs');
           statusClass = '';
         }).catch(function (err) {
-          statusText = tr('ui.loadError', { error: err && err.message ? err.message : String(err) }, 'Could not load journal: ' + (err && err.message ? err.message : String(err)));
-          statusClass = 'error';
+          reportError('ui.loadError', 'Could not load journal. Please try again.', err);
         });
       }
       return api.settings.read(scope.key).then(function (stored) {
@@ -348,8 +354,7 @@
         statusText = tr('ui.ready', null, 'Ready');
         statusClass = '';
       }).catch(function (err) {
-        statusText = tr('ui.loadError', { error: err && err.message ? err.message : String(err) }, 'Could not load journal: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.loadError', 'Could not load journal. Please try again.', err);
       });
     }
 
diff --git a/plugins/journal/locales/en.json b/plugins/journal/locales/en.json
index 4c74be4..80d3e29 100644
--- a/plugins/journal/locales/en.json
+++ b/plugins/journal/locales/en.json
@@ -8,9 +8,9 @@
   "ui.title": "Journal",
   "ui.workspaceTitle": "Journal · {workspace}",
   "ui.add": "Add",
-  "ui.saveError": "Could not save journal: {error}",
+  "ui.saveError": "Could not save journal. Please try again.",
   "ui.aggregating": "Aggregating worklogs",
-  "ui.loadError": "Could not load journal: {error}",
+  "ui.loadError": "Could not load journal. Please try again.",
   "ui.ready": "Ready",
   "ui.workItem": "Work item",
   "ui.body": "Body",
diff --git a/plugins/journal/locales/ru.json b/plugins/journal/locales/ru.json
index 6f955bf..60fe0a0 100644
--- a/plugins/journal/locales/ru.json
+++ b/plugins/journal/locales/ru.json
@@ -8,9 +8,9 @@
   "ui.title": "Журнал",
   "ui.workspaceTitle": "Журнал · {workspace}",
   "ui.add": "Добавить",
-  "ui.saveError": "Не удалось сохранить журнал: {error}",
+  "ui.saveError": "Не удалось сохранить журнал. Повторите попытку.",
   "ui.aggregating": "Сбор записей о работе",
-  "ui.loadError": "Не удалось загрузить журнал: {error}",
+  "ui.loadError": "Не удалось загрузить журнал. Повторите попытку.",
   "ui.ready": "Готово",
   "ui.workItem": "Выполненная работа",
   "ui.body": "Описание",
diff --git a/plugins/notes/frontend/src/index.js b/plugins/notes/frontend/src/index.js
index 5013921..af5de61 100644
--- a/plugins/notes/frontend/src/index.js
+++ b/plugins/notes/frontend/src/index.js
@@ -324,6 +324,13 @@
         }
       }
 
+      function userFacingError(key, fallback, err) {
+        if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+          console.warn('[verstak.notes] ' + key, err);
+        }
+        return tr(key, null, fallback);
+      }
+
       function loadNotes() {
         listContainer.innerHTML = '';
         listContainer.appendChild(el('div', { className: 'notes-empty' }, [tr('ui.loading', null, 'Loading...')]));
@@ -335,7 +342,7 @@
           renderList();
         }).catch(function (err) {
           if (disposed) return;
-          renderEmpty('Error: ' + (err.message || err));
+          renderEmpty(userFacingError('ui.loadError', 'Could not load notes. Please try again.', err));
         });
       }
 
@@ -379,8 +386,7 @@
         }).then(function () {
           if (!disposed) setStatus(action.label + ' complete', 'success');
         }).catch(function (err) {
-          console.error('[notes] contribution action failed:', err);
-          if (!disposed) setStatus('Error: ' + (err && err.message ? err.message : err), 'error');
+          if (!disposed) setStatus(userFacingError('ui.actionError', 'Could not complete this note action. Please try again.', err), 'error');
         });
       }
 
@@ -533,7 +539,7 @@
             }).catch(function () {});
           }
         }).catch(function (err) {
-          setStatus('Error: ' + (err.message || err), 'error');
+          setStatus(userFacingError('ui.createError', 'Could not create the note. Please try again.', err), 'error');
         });
       }
 
@@ -568,7 +574,7 @@
           setStatus(tr('ui.renamed', null, 'Note renamed'), 'success');
           loadNotes();
         }).catch(function (err) {
-          setStatus('Error: ' + (err.message || err), 'error');
+          setStatus(userFacingError('ui.renameError', 'Could not rename the note. Please try again.', err), 'error');
         });
       }
 
@@ -585,7 +591,7 @@
             setStatus(tr('ui.trashed', null, 'Note moved to trash'), 'success');
             loadNotes();
           }).catch(function (err) {
-            setStatus('Error: ' + (err.message || err), 'error');
+            setStatus(userFacingError('ui.trashError', 'Could not move the note to trash. Please try again.', err), 'error');
           });
         });
       }
diff --git a/plugins/notes/locales/en.json b/plugins/notes/locales/en.json
index f941530..451c9f3 100644
--- a/plugins/notes/locales/en.json
+++ b/plugins/notes/locales/en.json
@@ -28,5 +28,10 @@
   "ui.existingFile": " Existing file: {path}.",
   "ui.chooseDifferent": " Please choose a different title.",
   "ui.trashTitle": "Move Note to Trash",
-  "ui.trashConfirm": "Move \"{title}\" to trash?"
+  "ui.trashConfirm": "Move \"{title}\" to trash?",
+  "ui.loadError": "Could not load notes. Please try again.",
+  "ui.actionError": "Could not complete this note action. Please try again.",
+  "ui.createError": "Could not create the note. Please try again.",
+  "ui.renameError": "Could not rename the note. Please try again.",
+  "ui.trashError": "Could not move the note to trash. Please try again."
 }
diff --git a/plugins/notes/locales/ru.json b/plugins/notes/locales/ru.json
index 3987a83..267b864 100644
--- a/plugins/notes/locales/ru.json
+++ b/plugins/notes/locales/ru.json
@@ -28,5 +28,10 @@
   "ui.existingFile": " Существующий файл: {path}.",
   "ui.chooseDifferent": " Выберите другое название.",
   "ui.trashTitle": "Переместить заметку в корзину",
-  "ui.trashConfirm": "Переместить «{title}» в корзину?"
+  "ui.trashConfirm": "Переместить «{title}» в корзину?",
+  "ui.loadError": "Не удалось загрузить заметки. Повторите попытку.",
+  "ui.actionError": "Не удалось выполнить действие с заметкой. Повторите попытку.",
+  "ui.createError": "Не удалось создать заметку. Повторите попытку.",
+  "ui.renameError": "Не удалось переименовать заметку. Повторите попытку.",
+  "ui.trashError": "Не удалось переместить заметку в корзину. Повторите попытку."
 }
diff --git a/plugins/search/frontend/src/index.js b/plugins/search/frontend/src/index.js
index 20f64a5..3413fbd 100644
--- a/plugins/search/frontend/src/index.js
+++ b/plugins/search/frontend/src/index.js
@@ -277,7 +277,8 @@
     try {
       providers = await api.contributions.list('searchProviders');
     } catch (err) {
-      output.errors.push(err && err.message ? err.message : String(err));
+      console.warn('[verstak.search] list search providers:', err);
+      output.errors.push(true);
       return output;
     }
     providers = Array.isArray(providers) ? providers : [];
@@ -294,7 +295,8 @@
         var normalized = normalizeProviderResults(provider, response && response.result);
         output.results = output.results.concat(normalized.slice(0, remaining - output.results.length));
       } catch (err) {
-        output.errors.push(err && err.message ? err.message : String(err));
+        console.warn('[verstak.search] provider search:', err);
+        output.errors.push(true);
       }
     }
     return output;
@@ -371,7 +373,9 @@
           if (typeof alertEl.removeAttribute === 'function') alertEl.removeAttribute('hidden');
           alertEl.appendChild(el('details', {}, [
             el('summary', {}, [tr('ui.providersFailed', null, 'Some plugin search providers did not respond')]),
-            el('div', {}, [state.providerErrors.join('; ')])
+            el('div', {}, [state.providerErrors.map(function () {
+              return tr('ui.providerUnavailable', null, 'A search provider is unavailable.');
+            }).join(' ')])
           ]));
         } else if (typeof alertEl.setAttribute === 'function') {
           alertEl.setAttribute('hidden', 'hidden');
@@ -460,8 +464,9 @@
           state.providerErrors = external.errors;
         } catch (err) {
           if (seq !== searchSeq) return;
+          console.warn('[verstak.search] search:', err);
           state.results = [];
-          state.error = err && err.message ? err.message : String(err);
+          state.error = tr('ui.searchError', null, 'Could not search the vault. Please try again.');
           state.providerErrors = [];
         } finally {
           if (seq !== searchSeq) return;
diff --git a/plugins/search/locales/en.json b/plugins/search/locales/en.json
index e5e50a6..d55bbf5 100644
--- a/plugins/search/locales/en.json
+++ b/plugins/search/locales/en.json
@@ -10,6 +10,8 @@
   "ui.searching": "Searching...",
   "ui.search": "Search",
   "ui.providersFailed": "Some plugin search providers did not respond",
+  "ui.providerUnavailable": "A search provider is unavailable.",
+  "ui.searchError": "Could not search the vault. Please try again.",
   "ui.noResults": "No results",
   "ui.open": "Open",
   "ui.count": "{count} result(s)"
diff --git a/plugins/search/locales/ru.json b/plugins/search/locales/ru.json
index 5417d72..8eef0b5 100644
--- a/plugins/search/locales/ru.json
+++ b/plugins/search/locales/ru.json
@@ -10,6 +10,8 @@
   "ui.searching": "Поиск...",
   "ui.search": "Искать",
   "ui.providersFailed": "Некоторые поставщики поиска не ответили",
+  "ui.providerUnavailable": "Один из источников поиска недоступен.",
+  "ui.searchError": "Не удалось выполнить поиск в хранилище. Повторите попытку.",
   "ui.noResults": "Ничего не найдено",
   "ui.open": "Открыть",
   "ui.count": "Результатов: {count}"
diff --git a/plugins/secrets/frontend/src/index.js b/plugins/secrets/frontend/src/index.js
index 27752d6..18c3aea 100644
--- a/plugins/secrets/frontend/src/index.js
+++ b/plugins/secrets/frontend/src/index.js
@@ -169,8 +169,8 @@
 
       function userFacingError(action, err) {
         var raw = (err && err.message) ? err.message : String(err || '');
-        if (typeof console !== 'undefined' && typeof console.error === 'function') {
-          console.error('[verstak.secrets] ' + action + ' failed', err);
+        if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+          console.warn('[verstak.secrets] ' + action + ' failed', err);
         }
         if (action === 'unlock') {
           var minimumLength = raw.match(/master password must be at least (\d+) characters/i);
diff --git a/plugins/sync/frontend/src/SyncSettings.svelte b/plugins/sync/frontend/src/SyncSettings.svelte
index 5e47601..c81cf00 100644
--- a/plugins/sync/frontend/src/SyncSettings.svelte
+++ b/plugins/sync/frontend/src/SyncSettings.svelte
@@ -28,11 +28,9 @@
   const INPUT_STYLE = 'width:100%;background:#0f3460;border:1px solid #1a3a5c;color:#e0e0f0;padding:8px 10px;border-radius:4px;font-size:0.85rem;box-sizing:border-box;height:36px;'
   const INPUT_FOCUS_STYLE = INPUT_STYLE + 'outline:none;border-color:#4ecca3;'
 
-  function sanitizeError(msg) {
-    if (!msg) return tr('ui.unknownError', null, 'Unknown error')
-    let s = String(msg).replace(/<[^>]+>/g, '')
-    if (s.length > 200) s = s.substring(0, 200) + '...'
-    return s
+  function reportError(key, fallback, error) {
+    console.warn('[verstak.sync] operation failed:', error)
+    return tr(key, null, fallback)
   }
 
   function syncAPI() {
@@ -51,15 +49,21 @@
           syncInterval = saved.syncInterval || 5
         }
       }
-    } catch (_) {}
+    } catch (error) {
+      console.warn('[verstak.sync] settings load failed:', error)
+    }
     try {
       settings = await syncAPI().status()
       if (settings) {
         if (settings.serverUrl) serverUrl = settings.serverUrl
         if (settings.syncInterval != null) syncInterval = settings.syncInterval
         if (settings.syncInterval > 0) autoSync = true
+        if (settings.lastError) console.warn('[verstak.sync] last sync failed:', settings.lastError)
       }
-    } catch (_) { settings = null }
+    } catch (error) {
+      console.warn('[verstak.sync] status load failed:', error)
+      settings = null
+    }
   }
 
   load()
@@ -80,7 +84,7 @@
       resultMsg = tr('ui.settingsSaved', null, 'Settings saved.')
       resultKind = ''
     } catch (e) {
-      errorMsg = sanitizeError(e.message || e)
+      errorMsg = reportError('ui.saveFailed', 'Could not save sync settings. Please try again.', e)
     }
     loading = false
   }
@@ -97,7 +101,7 @@
       connectionResult = tr('ui.connectionSuccessful', null, 'Connection successful.')
     } catch (e) {
       connectionOk = false
-      connectionResult = tr('ui.connectionFailed', { error: sanitizeError(e.message || e) }, 'Connection failed: {error}')
+      connectionResult = reportError('ui.connectionFailed', 'Could not connect. Check the server address and credentials.', e)
     }
     loading = false
   }
@@ -115,7 +119,7 @@
       password = ''
       await load()
     } catch (e) {
-      errorMsg = sanitizeError(e.message || e)
+      errorMsg = reportError('ui.connectFailed', 'Could not connect this device. Please try again.', e)
     }
     loading = false
   }
@@ -129,23 +133,8 @@
     return parts.join(' · ')
   }
 
-  function conflictField(conflict, keys) {
-    for (const key of keys) {
-      const value = conflict && conflict[key]
-      if (value != null && String(value).trim()) return String(value)
-    }
-    return ''
-  }
-
-  function formatSyncConflict(conflict) {
-    const entityType = conflictField(conflict, ['entity_type', 'entityType']) || 'item'
-    const entityId = conflictField(conflict, ['entity_id', 'entityId', 'path']) || 'unknown'
-    const opId = conflictField(conflict, ['op_id', 'opId'])
-    const reason = conflictField(conflict, ['reason', 'message'])
-    const parts = [entityType + ': ' + entityId]
-    if (opId) parts.push('op ' + opId)
-    if (reason) parts.push(reason)
-    return parts.join(' · ')
+  function formatSyncConflict() {
+    return tr('ui.syncConflictItem', null, 'A synchronization conflict needs attention.')
   }
 
   async function runSyncNow() {
@@ -163,7 +152,7 @@
       resultKind = warning ? 'warning' : ''
       await load()
     } catch (e) {
-      errorMsg = sanitizeError(e.message || e)
+      errorMsg = reportError('ui.syncFailed', 'Could not synchronize. Please try again.', e)
     }
     loading = false
   }
@@ -194,7 +183,7 @@
       settings = null
       await load()
     } catch (e) {
-      errorMsg = sanitizeError(e.message || e)
+      errorMsg = reportError('ui.disconnectFailed', 'Could not disconnect from the server. Please try again.', e)
     }
     loading = false
   }
@@ -209,7 +198,7 @@
       resultKind = ''
       await load()
     } catch (e) {
-      errorMsg = sanitizeError(e.message || e)
+      errorMsg = reportError('ui.resetKeyFailed', 'Could not reset the sync key. Please try again.', e)
     }
     loading = false
   }
@@ -243,7 +232,7 @@
   {/if}
   {#if settings && settings.lastError && !errorMsg}
     <div style="padding:0.5rem 0.75rem;margin-bottom:0.75rem;background:rgba(255,107,107,0.1);border:1px solid rgba(255,107,107,0.3);border-radius:6px;color:#ff6b6b;font-size:0.85rem;">
-      {tr('ui.lastSyncError', { error: sanitizeError(settings.lastError) }, 'Last sync error: {error}')}
+      {tr('ui.lastSyncError', null, 'The last synchronization did not finish. Try again.')}
     </div>
   {/if}
 
diff --git a/plugins/sync/locales/en.json b/plugins/sync/locales/en.json
index 97b7fea..4237cb9 100644
--- a/plugins/sync/locales/en.json
+++ b/plugins/sync/locales/en.json
@@ -5,12 +5,17 @@
   "ui.title": "Sync",
   "ui.description": "Synchronize your vault across devices.",
   "ui.unknownError": "Unknown error",
-  "ui.apiUnavailable": "Plugin API sync namespace not available",
+  "ui.apiUnavailable": "Synchronization is unavailable right now.",
   "ui.intervalError": "Sync interval must be between 1 and 1440 minutes.",
   "ui.settingsSaved": "Settings saved.",
   "ui.serverRequired": "Server URL is required.",
   "ui.connectionSuccessful": "Connection successful.",
-  "ui.connectionFailed": "Connection failed: {error}",
+  "ui.connectionFailed": "Could not connect. Check the server address and credentials.",
+  "ui.saveFailed": "Could not save sync settings. Please try again.",
+  "ui.connectFailed": "Could not connect this device. Please try again.",
+  "ui.syncFailed": "Could not synchronize. Please try again.",
+  "ui.disconnectFailed": "Could not disconnect from the server. Please try again.",
+  "ui.resetKeyFailed": "Could not reset the sync key. Please try again.",
   "ui.connectedSuccessfully": "Connected successfully.",
   "ui.conflictsCount": "{count} conflict(s)",
   "ui.errorsCount": "{count} error(s)",
@@ -18,7 +23,8 @@
   "ui.disconnected": "Disconnected from server.",
   "ui.keyReset": "Sync key reset. Connect again to pair this device.",
   "ui.syncConflicts": "Sync conflicts",
-  "ui.lastSyncError": "Last sync error: {error}",
+  "ui.lastSyncError": "The last synchronization did not finish. Try again.",
+  "ui.syncConflictItem": "A synchronization conflict needs attention.",
   "ui.server": "Server",
   "ui.serverUrl": "Server URL",
   "ui.username": "Username",
diff --git a/plugins/sync/locales/ru.json b/plugins/sync/locales/ru.json
index 7ef79c3..721370b 100644
--- a/plugins/sync/locales/ru.json
+++ b/plugins/sync/locales/ru.json
@@ -5,12 +5,17 @@
   "ui.title": "Синхронизация",
   "ui.description": "Синхронизируйте хранилище между устройствами.",
   "ui.unknownError": "Неизвестная ошибка",
-  "ui.apiUnavailable": "API синхронизации плагина недоступен",
+  "ui.apiUnavailable": "Синхронизация сейчас недоступна.",
   "ui.intervalError": "Интервал синхронизации должен быть от 1 до 1440 минут.",
   "ui.settingsSaved": "Настройки сохранены.",
   "ui.serverRequired": "Укажите URL сервера.",
   "ui.connectionSuccessful": "Подключение успешно.",
-  "ui.connectionFailed": "Не удалось подключиться: {error}",
+  "ui.connectionFailed": "Не удалось подключиться. Проверьте адрес сервера и учётные данные.",
+  "ui.saveFailed": "Не удалось сохранить настройки синхронизации. Повторите попытку.",
+  "ui.connectFailed": "Не удалось подключить это устройство. Повторите попытку.",
+  "ui.syncFailed": "Не удалось синхронизировать данные. Повторите попытку.",
+  "ui.disconnectFailed": "Не удалось отключиться от сервера. Повторите попытку.",
+  "ui.resetKeyFailed": "Не удалось сбросить ключ синхронизации. Повторите попытку.",
   "ui.connectedSuccessfully": "Подключение установлено.",
   "ui.conflictsCount": "Конфликтов: {count}",
   "ui.errorsCount": "Ошибок: {count}",
@@ -18,7 +23,8 @@
   "ui.disconnected": "Сервер отключён.",
   "ui.keyReset": "Ключ синхронизации сброшен. Подключитесь снова, чтобы связать устройство.",
   "ui.syncConflicts": "Конфликты синхронизации",
-  "ui.lastSyncError": "Ошибка последней синхронизации: {error}",
+  "ui.lastSyncError": "Последняя синхронизация не завершилась. Повторите попытку.",
+  "ui.syncConflictItem": "Конфликт синхронизации требует внимания.",
   "ui.server": "Сервер",
   "ui.serverUrl": "URL сервера",
   "ui.username": "Имя пользователя",
diff --git a/plugins/todo/frontend/src/index.js b/plugins/todo/frontend/src/index.js
index 2b1d3ed..4a8f2e7 100644
--- a/plugins/todo/frontend/src/index.js
+++ b/plugins/todo/frontend/src/index.js
@@ -402,11 +402,18 @@
       }).filter(function (item) { return item !== null; });
     }
 
+    function reportError(key, fallback, err) {
+      if (typeof console !== 'undefined' && typeof console.warn === 'function') {
+        console.warn('[verstak.todo] ' + key, err);
+      }
+      statusText = tr(key, null, fallback);
+      statusClass = 'error';
+    }
+
     function syncNotifications() {
       if (!api || !api.notifications || typeof api.notifications.replace !== 'function') return Promise.resolve();
       return api.notifications.replace(notificationRequests()).catch(function (err) {
-        statusText = tr('ui.notificationError', { error: err && err.message ? err.message : String(err) }, 'Could not schedule reminders: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.notificationError', 'Could not schedule reminders. Please try again.', err);
       });
     }
 
@@ -415,8 +422,7 @@
       return api.settings.write(GLOBAL_KEY, storageTodos(sortTodos(todos))).then(function () {
         return syncNotifications();
       }).catch(function (err) {
-        statusText = tr('ui.saveError', { error: err && err.message ? err.message : String(err) }, 'Could not save todos: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.saveError', 'Could not save tasks. Please try again.', err);
       });
     }
 
@@ -426,8 +432,7 @@
         todos = sortTodos(normalizeTodos((settings || {})[GLOBAL_KEY]));
         return syncNotifications();
       }).catch(function (err) {
-        statusText = tr('ui.loadError', { error: err && err.message ? err.message : String(err) }, 'Could not load todos: ' + (err && err.message ? err.message : String(err)));
-        statusClass = 'error';
+        reportError('ui.loadError', 'Could not load tasks. Please try again.', err);
       });
     }
 
diff --git a/plugins/todo/locales/en.json b/plugins/todo/locales/en.json
index fc6d182..08b7a19 100644
--- a/plugins/todo/locales/en.json
+++ b/plugins/todo/locales/en.json
@@ -17,9 +17,9 @@
   "ui.add": "Add Todo",
   "ui.allWorkspaces": "All workspaces",
   "ui.unassigned": "Unassigned",
-  "ui.saveError": "Could not save todos: {error}",
-  "ui.loadError": "Could not load todos: {error}",
-  "ui.notificationError": "Could not schedule reminders: {error}",
+  "ui.saveError": "Could not save tasks. Please try again.",
+  "ui.loadError": "Could not load tasks. Please try again.",
+  "ui.notificationError": "Could not schedule reminders. Please try again.",
   "ui.notificationTitle": "Todo reminder",
   "ui.notificationBody": "{title}",
   "ui.titlePlaceholder": "Todo title",
diff --git a/plugins/todo/locales/ru.json b/plugins/todo/locales/ru.json
index 9ed708e..e73f33a 100644
--- a/plugins/todo/locales/ru.json
+++ b/plugins/todo/locales/ru.json
@@ -17,9 +17,9 @@
   "ui.add": "Добавить задачу",
   "ui.allWorkspaces": "Все рабочие пространства",
   "ui.unassigned": "Не назначено",
-  "ui.saveError": "Не удалось сохранить задачи: {error}",
-  "ui.loadError": "Не удалось загрузить задачи: {error}",
-  "ui.notificationError": "Не удалось запланировать напоминания: {error}",
+  "ui.saveError": "Не удалось сохранить задачи. Повторите попытку.",
+  "ui.loadError": "Не удалось загрузить задачи. Повторите попытку.",
+  "ui.notificationError": "Не удалось запланировать напоминания. Повторите попытку.",
   "ui.notificationTitle": "Напоминание о задаче",
   "ui.notificationBody": "{title}",
   "ui.titlePlaceholder": "Название задачи",
diff --git a/scripts/check-user-facing-errors.js b/scripts/check-user-facing-errors.js
new file mode 100644
index 0000000..624a27a
--- /dev/null
+++ b/scripts/check-user-facing-errors.js
@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const path = require('path');
+
+const root = path.resolve(__dirname, '..');
+function frontendSources(dir) {
+  if (!fs.existsSync(dir)) return [];
+  return fs.readdirSync(dir, { withFileTypes: true }).flatMap((entry) => {
+    const target = path.join(dir, entry.name);
+    if (entry.isDirectory()) return frontendSources(target);
+    return /\.(?:js|svelte)$/.test(entry.name) ? [target] : [];
+  });
+}
+
+const files = fs.readdirSync(path.join(root, 'plugins'))
+  .flatMap((plugin) => frontendSources(path.join(root, 'plugins', plugin, 'frontend', 'src')));
+
+const renderPatterns = [
+  /statusText\s*=/,
+  /state\.error\s*=/,
+  /errorMsg\s*=/,
+  /setStatus\(/,
+  /setCreateError\(/,
+  /setRenameError\(/,
+  /renderEmpty\(/,
+  /output\.errors\.push\(/,
+  /window\.alert\(/,
+  /showExternalFallback\(/,
+  /de-error-msg/,
+  /files-error-msg/,
+  /body\.textContent\s*=/
+];
+
+const violations = [];
+for (const file of files) {
+  const lines = fs.readFileSync(file, 'utf8').split('\n');
+  lines.forEach((line, index) => {
+    if (!/(?:err(?:or)?\.message|String\(err(?:or)?\b)/.test(line)) return;
+    if (!renderPatterns.some((pattern) => pattern.test(line))) return;
+    violations.push(`${path.relative(root, file)}:${index + 1}: technical error text reaches a user-facing UI sink`);
+  });
+}
+
+if (violations.length) {
+  console.error('User-facing UI must not render raw backend/plugin errors:');
+  violations.forEach((violation) => console.error(`  ${violation}`));
+  process.exit(1);
+}
+
+console.log('user-facing error messages do not expose raw backend details');
diff --git a/scripts/check.sh b/scripts/check.sh
index 8412f33..2aa94d1 100755
--- a/scripts/check.sh
+++ b/scripts/check.sh
@@ -101,6 +101,18 @@ else
   echo "  ⚠️  node not available — skipping select style validation"
 fi
 
+echo ""
+echo "[user-facing errors]"
+if command -v node &>/dev/null; then
+  set +e
+  node "$ROOT/scripts/check-user-facing-errors.js"
+  STATUS=$?
+  set -e
+  report "user-facing errors" "$STATUS"
+else
+  echo "  ⚠️  node not available — skipping user-facing error validation"
+fi
+
 echo ""
 # Guard official plugins against bypassing the v2 plugin API for note features.
 echo "[frontend API boundary]"
diff --git a/scripts/smoke-browser-inbox-plugin.js b/scripts/smoke-browser-inbox-plugin.js
index 53717b7..a0bfb01 100644
--- a/scripts/smoke-browser-inbox-plugin.js
+++ b/scripts/smoke-browser-inbox-plugin.js
@@ -6,6 +6,7 @@ const vm = require('vm');
 const root = path.resolve(__dirname, '..');
 const sourcePath = path.join(root, 'plugins', 'browser-inbox', 'frontend', 'src', 'index.js');
 const source = fs.readFileSync(sourcePath, 'utf8');
+const technicalErrors = [];
 
 class FakeNode {
   constructor(tagName) {
@@ -113,7 +114,15 @@ function makeDocument() {
 function loadComponents(document) {
   const registry = {};
   const sandbox = {
-    console,
+    console: {
+      ...console,
+      warn(...args) {
+        technicalErrors.push(args.map((value) => String(value)).join(' '));
+      },
+      error(...args) {
+        technicalErrors.push(args.map((value) => String(value)).join(' '));
+      },
+    },
     Date,
     document,
     window: {
@@ -738,9 +747,12 @@ async function mountSettingsWithApi(api, document = makeDocument()) {
   if (!failedConversionApi.getStoredCaptures(globalKey).some((capture) => capture.captureId === 'convert-conflict')) {
     throw new Error('failed conversion removed capture from queue');
   }
-  if (!failedConversionView.container.textContent.includes('Could not create note')) {
+  if (!failedConversionView.container.textContent.includes('Could not create the note. Please try again.')) {
     throw new Error('failed conversion did not render an error status');
   }
+  if (failedConversionView.container.textContent.includes('file already exists')) {
+    throw new Error('failed conversion exposed a raw backend error');
+  }
   if (failedConversionApi.publishedEvents.some((event) => event.name === 'browser.capture.converted')) {
     throw new Error('failed conversion published converted event');
   }
@@ -827,7 +839,7 @@ async function mountSettingsWithApi(api, document = makeDocument()) {
   if (!failedLinkApi.getStoredCaptures(globalKey).some((capture) => capture.captureId === 'convert-link-conflict')) {
     throw new Error('failed link conversion removed capture from queue');
   }
-  if (!failedLinkView.container.textContent.includes('Could not create link')) {
+  if (!failedLinkView.container.textContent.includes('Could not create the link. Please try again.')) {
     throw new Error('failed link conversion did not render an error status');
   }
   if (failedLinkApi.publishedEvents.some((event) => event.name === 'browser.capture.converted')) {
@@ -934,7 +946,7 @@ async function mountSettingsWithApi(api, document = makeDocument()) {
   if (!failedFileApi.getStoredCaptures(globalKey).some((capture) => capture.captureId === 'convert-file-conflict')) {
     throw new Error('failed file conversion removed capture from queue');
   }
-  if (!failedFileView.container.textContent.includes('Could not create file')) {
+  if (!failedFileView.container.textContent.includes('Could not create the file. Please try again.')) {
     throw new Error('failed file conversion did not render an error status');
   }
   if (failedFileApi.publishedEvents.some((event) => event.name === 'browser.capture.converted')) {
@@ -942,6 +954,10 @@ async function mountSettingsWithApi(api, document = makeDocument()) {
   }
   component.unmount && component.unmount(failedFileView.container);
 
+  if (!technicalErrors.some((entry) => entry.includes('file already exists'))) {
+    throw new Error('failed conversion did not retain its technical details in the console log');
+  }
+
   console.log('browser inbox plugin smoke passed');
 })().catch((err) => {
   console.error(err);
diff --git a/scripts/smoke-search-plugin.js b/scripts/smoke-search-plugin.js
index 0ae5c4a..2e6050f 100644
--- a/scripts/smoke-search-plugin.js
+++ b/scripts/smoke-search-plugin.js
@@ -8,6 +8,7 @@ const sourcePath = path.join(root, 'plugins', 'search', 'frontend', 'src', 'inde
 const manifestPath = path.join(root, 'plugins', 'search', 'plugin.json');
 const source = fs.readFileSync(sourcePath, 'utf8');
 const manifest = JSON.parse(fs.readFileSync(manifestPath, 'utf8'));
+const technicalErrors = [];
 
 class FakeNode {
   constructor(tagName) {
@@ -100,7 +101,15 @@ function makeDocument() {
 function loadComponent(document) {
   const registry = {};
   vm.runInNewContext(source, {
-    console,
+    console: {
+      ...console,
+      warn(...args) {
+        technicalErrors.push(args.map((value) => String(value)).join(' '));
+      },
+      error(...args) {
+        technicalErrors.push(args.map((value) => String(value)).join(' '));
+      },
+    },
     document,
     window: {
       VerstakPluginRegister(pluginId, bundle) {
@@ -253,11 +262,13 @@ async function wait(ms) {
   if (!container.textContent.includes('Project/Target Assets')) throw new Error('typing should search folder paths');
   if (!container.textContent.includes('Project/External/target.note')) throw new Error('external provider result should be rendered');
   if (!container.textContent.includes('External Notes')) throw new Error('external provider label should be rendered');
-  if (!container.textContent.includes('provider unavailable')) throw new Error('provider failure should be reported without failing search');
+  if (!container.textContent.includes('A search provider is unavailable.')) throw new Error('provider failure should be reported without failing search');
+  if (container.textContent.includes('provider unavailable')) throw new Error('provider failure leaked a raw backend error');
   if (!container.textContent.includes('Content match')) throw new Error('content result type was not rendered');
   if (!container.textContent.includes('Folder name')) throw new Error('folder result type was not rendered');
   if (!pluginData['search-index'] || !Array.isArray(pluginData['search-index'].files)) throw new Error('search index was not written to plugin data storage');
   if (providerCalls.some((call) => call.pluginId === 'verstak.search')) throw new Error('search must not call itself as an external provider');
+  if (!technicalErrors.some((entry) => entry.includes('provider unavailable'))) throw new Error('provider failure was not retained in the console log');
 
   input = queryInput();
   input.value = 'image';
diff --git a/scripts/smoke-secrets-plugin.js b/scripts/smoke-secrets-plugin.js
index 2676ff6..48c24fc 100755
--- a/scripts/smoke-secrets-plugin.js
+++ b/scripts/smoke-secrets-plugin.js
@@ -101,6 +101,9 @@ function loadComponent(document, errorLog) {
   vm.runInNewContext(source, {
     console: {
       ...console,
+      warn(...args) {
+        errorLog.push(args.map((value) => String(value)).join(' '));
+      },
       error(...args) {
         errorLog.push(args.map((value) => String(value)).join(' '));
       },
diff --git a/scripts/smoke-sync-plugin.js b/scripts/smoke-sync-plugin.js
index 6232bb6..966e669 100644
--- a/scripts/smoke-sync-plugin.js
+++ b/scripts/smoke-sync-plugin.js
@@ -9,14 +9,17 @@ const source = fs.readFileSync(sourcePath, 'utf8');
 if (!source.includes('settings.lastError')) {
   throw new Error('SyncSettings must render persisted settings.lastError');
 }
-if (!source.includes('sanitizeError(settings.lastError)')) {
-  throw new Error('SyncSettings must sanitize persisted sync errors before rendering');
+if (!source.includes('function reportError')) {
+  throw new Error('SyncSettings must map technical failures to localized action-specific errors');
 }
-if (!source.includes('Last sync error')) {
+if (/sanitizeError\(/.test(source) || /\{ error: sanitizeError/.test(source)) {
+  throw new Error('SyncSettings must not interpolate raw technical errors into user-facing messages');
+}
+if (!source.includes("tr('ui.lastSyncError'")) {
   throw new Error('SyncSettings must label the persisted sync error');
 }
-if (!source.includes('function formatSyncConflict')) {
-  throw new Error('SyncSettings must format individual sync conflicts');
+if (!source.includes("tr('ui.syncConflictItem'")) {
+  throw new Error('SyncSettings must hide technical conflict identifiers behind a user-facing summary');
 }
 if (!source.includes('conflictDetails')) {
   throw new Error('SyncSettings must store sync conflict details after Sync Now');