feat: Improve notifications with templates, summarization, and more (#317)

* feat: Successfully added new notification settings to Zustand

* feat: Successfully implemented the Events subsection

* feat: Successfully wired new notification settings

* feat: Added notification template editor section to Notifications

* feat: Added server-side template resolution and summarize

* feat: Improve notifications with templates, summarization, and more

* fix: session not populated in messages

* fix notification template first-run defaults

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/desktop.ts

@@ -49,6 +49,26 @@ export type DesktopSettings = {
   nativeNotificationsEnabled?: boolean;
   notificationMode?: 'always' | 'hidden-only';
   notifyOnSubtasks?: boolean;
+
+  // Event toggles (which events trigger notifications)
+  notifyOnCompletion?: boolean;
+  notifyOnError?: boolean;
+  notifyOnQuestion?: boolean;
+
+  // Per-event notification templates
+  notificationTemplates?: {
+    completion: { title: string; message: string };
+    error: { title: string; message: string };
+    question: { title: string; message: string };
+    subtask: { title: string; message: string };
+  };
+
+  // Summarization settings
+  summarizeLastMessage?: boolean;
+  summaryThreshold?: number;
+  summaryLength?: number;
+  maxLastMessageLength?: number;
+
   usageAutoRefresh?: boolean;
   usageRefreshIntervalMs?: number;
   usageDisplayMode?: 'usage' | 'remaining';