Russian UI: settings, notch views, agent steps, errors; visible success after installing hooks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

NotchBuddy/Sources/App/N8nPoller.swift

@@ -195,7 +195,7 @@ final class N8nPoller: @unchecked Sendable {
               let items    = main.first else { return nil }
 
         let count = items.count
-        let header = "→ \(lastNode) · \(count) item\(count == 1 ? "" : "s")"
+        let header = "→ \(lastNode) · \(count) \(ruItems(count))"
 
         // Preview first item's JSON keys (up to 4)
         if let firstItem = items.first,
@@ -257,3 +257,11 @@ final class N8nPoller: @unchecked Sendable {
         appendAppLog("n8n.log", message, timestampFormat: "HH:mm:ss")
     }
 }
+
+/// Russian plural for "элемент": 1 элемент, 2 элемента, 5 элементов.
+fileprivate func ruItems(_ n: Int) -> String {
+    let mod10 = n % 10, mod100 = n % 100
+    if mod10 == 1 && mod100 != 11 { return "элемент" }
+    if (2...4).contains(mod10) && !(12...14).contains(mod100) { return "элемента" }
+    return "элементов"
+}