feat: implement notifications and event history features

- Added Notification Service to manage project-level notifications, including creation, listing, marking as read, and dismissing notifications.
- Introduced Event History Service to store and manage historical events, allowing for listing, retrieval, deletion, and replaying of events.
- Integrated notifications into the server and UI, providing real-time updates for feature statuses and operations.
- Enhanced sidebar and project switcher components to display unread notifications count.
- Created dedicated views for managing notifications and event history, improving user experience and accessibility.

These changes enhance the application's ability to inform users about important events and statuses, improving overall usability and responsiveness.

apps/ui/src/components/views/settings-view/event-hooks/event-history-view.tsx

@@ -0,0 +1,341 @@
+import { useState, useEffect, useCallback } from 'react';
+import { Button } from '@/components/ui/button';
+import { cn } from '@/lib/utils';
+import {
+  History,
+  RefreshCw,
+  Trash2,
+  Play,
+  ChevronDown,
+  ChevronRight,
+  CheckCircle,
+  XCircle,
+  Clock,
+  AlertCircle,
+} from 'lucide-react';
+import { useAppStore } from '@/store/app-store';
+import type { StoredEventSummary, StoredEvent, EventHookTrigger } from '@automaker/types';
+import { EVENT_HOOK_TRIGGER_LABELS } from '@automaker/types';
+import { getHttpApiClient } from '@/lib/http-api-client';
+import { ConfirmDialog } from '@/components/ui/confirm-dialog';
+
+export function EventHistoryView() {
+  const currentProject = useAppStore((state) => state.currentProject);
+  const projectPath = currentProject?.path;
+  const [events, setEvents] = useState<StoredEventSummary[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [expandedEvent, setExpandedEvent] = useState<string | null>(null);
+  const [expandedEventData, setExpandedEventData] = useState<StoredEvent | null>(null);
+  const [replayingEvent, setReplayingEvent] = useState<string | null>(null);
+  const [clearDialogOpen, setClearDialogOpen] = useState(false);
+
+  const loadEvents = useCallback(async () => {
+    if (!projectPath) return;
+
+    setLoading(true);
+    try {
+      const api = getHttpApiClient();
+      const result = await api.eventHistory.list(projectPath, { limit: 100 });
+      if (result.success && result.events) {
+        setEvents(result.events);
+      }
+    } catch (error) {
+      console.error('Failed to load events:', error);
+    } finally {
+      setLoading(false);
+    }
+  }, [projectPath]);
+
+  useEffect(() => {
+    loadEvents();
+  }, [loadEvents]);
+
+  const handleExpand = async (eventId: string) => {
+    if (expandedEvent === eventId) {
+      setExpandedEvent(null);
+      setExpandedEventData(null);
+      return;
+    }
+
+    if (!projectPath) return;
+
+    setExpandedEvent(eventId);
+    try {
+      const api = getHttpApiClient();
+      const result = await api.eventHistory.get(projectPath, eventId);
+      if (result.success && result.event) {
+        setExpandedEventData(result.event);
+      }
+    } catch (error) {
+      console.error('Failed to load event details:', error);
+    }
+  };
+
+  const handleReplay = async (eventId: string) => {
+    if (!projectPath) return;
+
+    setReplayingEvent(eventId);
+    try {
+      const api = getHttpApiClient();
+      const result = await api.eventHistory.replay(projectPath, eventId);
+      if (result.success && result.result) {
+        const { hooksTriggered, hookResults } = result.result;
+        const successCount = hookResults.filter((r) => r.success).length;
+        const failCount = hookResults.filter((r) => !r.success).length;
+
+        if (hooksTriggered === 0) {
+          alert('No matching hooks found for this event trigger.');
+        } else if (failCount === 0) {
+          alert(`Successfully ran ${successCount} hook(s).`);
+        } else {
+          alert(`Ran ${hooksTriggered} hook(s): ${successCount} succeeded, ${failCount} failed.`);
+        }
+      }
+    } catch (error) {
+      console.error('Failed to replay event:', error);
+      alert('Failed to replay event. Check console for details.');
+    } finally {
+      setReplayingEvent(null);
+    }
+  };
+
+  const handleDelete = async (eventId: string) => {
+    if (!projectPath) return;
+
+    try {
+      const api = getHttpApiClient();
+      const result = await api.eventHistory.delete(projectPath, eventId);
+      if (result.success) {
+        setEvents((prev) => prev.filter((e) => e.id !== eventId));
+        if (expandedEvent === eventId) {
+          setExpandedEvent(null);
+          setExpandedEventData(null);
+        }
+      }
+    } catch (error) {
+      console.error('Failed to delete event:', error);
+    }
+  };
+
+  const handleClearAll = async () => {
+    if (!projectPath) return;
+
+    try {
+      const api = getHttpApiClient();
+      const result = await api.eventHistory.clear(projectPath);
+      if (result.success) {
+        setEvents([]);
+        setExpandedEvent(null);
+        setExpandedEventData(null);
+      }
+    } catch (error) {
+      console.error('Failed to clear events:', error);
+    }
+    setClearDialogOpen(false);
+  };
+
+  const getTriggerIcon = (trigger: EventHookTrigger) => {
+    switch (trigger) {
+      case 'feature_created':
+        return <Clock className="w-4 h-4 text-blue-500" />;
+      case 'feature_success':
+        return <CheckCircle className="w-4 h-4 text-green-500" />;
+      case 'feature_error':
+        return <XCircle className="w-4 h-4 text-red-500" />;
+      case 'auto_mode_complete':
+        return <CheckCircle className="w-4 h-4 text-purple-500" />;
+      case 'auto_mode_error':
+        return <AlertCircle className="w-4 h-4 text-orange-500" />;
+      default:
+        return <History className="w-4 h-4 text-muted-foreground" />;
+    }
+  };
+
+  const formatTimestamp = (timestamp: string) => {
+    const date = new Date(timestamp);
+    const now = new Date();
+    const diffMs = now.getTime() - date.getTime();
+    const diffMins = Math.floor(diffMs / 60000);
+    const diffHours = Math.floor(diffMs / 3600000);
+    const diffDays = Math.floor(diffMs / 86400000);
+
+    if (diffMins < 1) return 'Just now';
+    if (diffMins < 60) return `${diffMins}m ago`;
+    if (diffHours < 24) return `${diffHours}h ago`;
+    if (diffDays < 7) return `${diffDays}d ago`;
+    return date.toLocaleDateString();
+  };
+
+  if (!projectPath) {
+    return (
+      <div className="text-center py-8 text-muted-foreground">
+        <History className="w-12 h-12 mx-auto mb-3 opacity-30" />
+        <p className="text-sm">Select a project to view event history</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* Header with actions */}
+      <div className="flex items-center justify-between">
+        <p className="text-sm text-muted-foreground">
+          {events.length} event{events.length !== 1 ? 's' : ''} recorded
+        </p>
+        <div className="flex items-center gap-2">
+          <Button variant="outline" size="sm" onClick={loadEvents} disabled={loading}>
+            <RefreshCw className={cn('w-4 h-4 mr-2', loading && 'animate-spin')} />
+            Refresh
+          </Button>
+          {events.length > 0 && (
+            <Button
+              variant="outline"
+              size="sm"
+              className="text-destructive hover:text-destructive"
+              onClick={() => setClearDialogOpen(true)}
+            >
+              <Trash2 className="w-4 h-4 mr-2" />
+              Clear All
+            </Button>
+          )}
+        </div>
+      </div>
+
+      {/* Events list */}
+      {events.length === 0 ? (
+        <div className="text-center py-8 text-muted-foreground">
+          <History className="w-12 h-12 mx-auto mb-3 opacity-30" />
+          <p className="text-sm">No events recorded yet</p>
+          <p className="text-xs mt-1">
+            Events will appear here when features are created or completed
+          </p>
+        </div>
+      ) : (
+        <div className="space-y-2">
+          {events.map((event) => (
+            <div
+              key={event.id}
+              className={cn(
+                'rounded-lg border bg-background/50',
+                expandedEvent === event.id && 'ring-1 ring-brand-500/30'
+              )}
+            >
+              {/* Event header */}
+              <div
+                className="flex items-center gap-3 p-3 cursor-pointer hover:bg-muted/30 transition-colors"
+                onClick={() => handleExpand(event.id)}
+              >
+                <button className="p-0.5">
+                  {expandedEvent === event.id ? (
+                    <ChevronDown className="w-4 h-4 text-muted-foreground" />
+                  ) : (
+                    <ChevronRight className="w-4 h-4 text-muted-foreground" />
+                  )}
+                </button>
+
+                {getTriggerIcon(event.trigger)}
+
+                <div className="flex-1 min-w-0">
+                  <p className="text-sm font-medium truncate">
+                    {EVENT_HOOK_TRIGGER_LABELS[event.trigger]}
+                  </p>
+                  {event.featureName && (
+                    <p className="text-xs text-muted-foreground truncate">{event.featureName}</p>
+                  )}
+                </div>
+
+                <span className="text-xs text-muted-foreground">
+                  {formatTimestamp(event.timestamp)}
+                </span>
+
+                {/* Actions */}
+                <div className="flex items-center gap-1" onClick={(e) => e.stopPropagation()}>
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    className="h-7 w-7"
+                    onClick={() => handleReplay(event.id)}
+                    disabled={replayingEvent === event.id}
+                    title="Replay event (trigger matching hooks)"
+                  >
+                    <Play
+                      className={cn('w-3.5 h-3.5', replayingEvent === event.id && 'animate-pulse')}
+                    />
+                  </Button>
+                  <Button
+                    variant="ghost"
+                    size="icon"
+                    className="h-7 w-7 text-destructive hover:text-destructive"
+                    onClick={() => handleDelete(event.id)}
+                    title="Delete event"
+                  >
+                    <Trash2 className="w-3.5 h-3.5" />
+                  </Button>
+                </div>
+              </div>
+
+              {/* Expanded details */}
+              {expandedEvent === event.id && expandedEventData && (
+                <div className="px-4 pb-4 pt-0 border-t border-border/50">
+                  <div className="mt-3 space-y-2 text-xs">
+                    <div className="grid grid-cols-2 gap-2">
+                      <div>
+                        <span className="text-muted-foreground">Event ID:</span>
+                        <p className="font-mono text-[10px] truncate">{expandedEventData.id}</p>
+                      </div>
+                      <div>
+                        <span className="text-muted-foreground">Timestamp:</span>
+                        <p>{new Date(expandedEventData.timestamp).toLocaleString()}</p>
+                      </div>
+                      {expandedEventData.featureId && (
+                        <div>
+                          <span className="text-muted-foreground">Feature ID:</span>
+                          <p className="font-mono text-[10px] truncate">
+                            {expandedEventData.featureId}
+                          </p>
+                        </div>
+                      )}
+                      {expandedEventData.passes !== undefined && (
+                        <div>
+                          <span className="text-muted-foreground">Passed:</span>
+                          <p>{expandedEventData.passes ? 'Yes' : 'No'}</p>
+                        </div>
+                      )}
+                    </div>
+                    {expandedEventData.error && (
+                      <div>
+                        <span className="text-muted-foreground">Error:</span>
+                        <p className="text-red-400 mt-1 p-2 bg-red-500/10 rounded text-[10px] font-mono whitespace-pre-wrap">
+                          {expandedEventData.error}
+                        </p>
+                      </div>
+                    )}
+                    <div>
+                      <span className="text-muted-foreground">Project:</span>
+                      <p className="font-mono text-[10px] truncate">
+                        {expandedEventData.projectPath}
+                      </p>
+                    </div>
+                  </div>
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Clear confirmation dialog */}
+      <ConfirmDialog
+        open={clearDialogOpen}
+        onOpenChange={setClearDialogOpen}
+        onConfirm={handleClearAll}
+        title="Clear Event History"
+        description={`This will permanently delete all ${events.length} recorded events. This action cannot be undone.`}
+        icon={Trash2}
+        iconClassName="text-destructive"
+        confirmText="Clear All"
+        confirmVariant="destructive"
+      />
+    </div>
+  );
+}

apps/ui/src/components/views/settings-view/event-hooks/event-hook-dialog.tsx

@@ -39,6 +39,7 @@ interface EventHookDialogProps {
 type ActionType = 'shell' | 'http';
 
 const TRIGGER_OPTIONS: EventHookTrigger[] = [
+  'feature_created',
   'feature_success',
   'feature_error',
   'auto_mode_complete',

apps/ui/src/components/views/settings-view/event-hooks/event-hooks-section.tsx

@@ -1,17 +1,20 @@
 import { useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { Switch } from '@/components/ui/switch';
+import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/components/ui/tabs';
 import { cn } from '@/lib/utils';
-import { Webhook, Plus, Trash2, Pencil, Terminal, Globe } from 'lucide-react';
+import { Webhook, Plus, Trash2, Pencil, Terminal, Globe, History } from 'lucide-react';
 import { useAppStore } from '@/store/app-store';
 import type { EventHook, EventHookTrigger } from '@automaker/types';
 import { EVENT_HOOK_TRIGGER_LABELS } from '@automaker/types';
 import { EventHookDialog } from './event-hook-dialog';
+import { EventHistoryView } from './event-history-view';
 
 export function EventHooksSection() {
   const { eventHooks, setEventHooks } = useAppStore();
   const [dialogOpen, setDialogOpen] = useState(false);
   const [editingHook, setEditingHook] = useState<EventHook | null>(null);
+  const [activeTab, setActiveTab] = useState<'hooks' | 'history'>('hooks');
 
   const handleAddHook = () => {
     setEditingHook(null);
@@ -78,58 +81,85 @@ export function EventHooksSection() {
               </p>
             </div>
           </div>
-          <Button onClick={handleAddHook} size="sm" className="gap-2">
-            <Plus className="w-4 h-4" />
-            Add Hook
-          </Button>
+          {activeTab === 'hooks' && (
+            <Button onClick={handleAddHook} size="sm" className="gap-2">
+              <Plus className="w-4 h-4" />
+              Add Hook
+            </Button>
+          )}
         </div>
       </div>
 
-      {/* Content */}
-      <div className="p-6">
-        {eventHooks.length === 0 ? (
-          <div className="text-center py-8 text-muted-foreground">
-            <Webhook className="w-12 h-12 mx-auto mb-3 opacity-30" />
-            <p className="text-sm">No event hooks configured</p>
-            <p className="text-xs mt-1">
-              Add hooks to run commands or send webhooks when features complete
-            </p>
-          </div>
-        ) : (
-          <div className="space-y-6">
-            {/* Group by trigger type */}
-            {Object.entries(hooksByTrigger).map(([trigger, hooks]) => (
-              <div key={trigger} className="space-y-3">
-                <h3 className="text-sm font-medium text-muted-foreground">
-                  {EVENT_HOOK_TRIGGER_LABELS[trigger as EventHookTrigger]}
-                </h3>
-                <div className="space-y-2">
-                  {hooks.map((hook) => (
-                    <HookCard
-                      key={hook.id}
-                      hook={hook}
-                      onEdit={() => handleEditHook(hook)}
-                      onDelete={() => handleDeleteHook(hook.id)}
-                      onToggle={(enabled) => handleToggleHook(hook.id, enabled)}
-                    />
-                  ))}
-                </div>
+      {/* Tabs */}
+      <Tabs value={activeTab} onValueChange={(v) => setActiveTab(v as 'hooks' | 'history')}>
+        <div className="px-6 pt-4">
+          <TabsList className="grid w-full max-w-xs grid-cols-2">
+            <TabsTrigger value="hooks" className="gap-2">
+              <Webhook className="w-4 h-4" />
+              Hooks
+            </TabsTrigger>
+            <TabsTrigger value="history" className="gap-2">
+              <History className="w-4 h-4" />
+              History
+            </TabsTrigger>
+          </TabsList>
+        </div>
+
+        {/* Hooks Tab */}
+        <TabsContent value="hooks" className="m-0">
+          <div className="p-6 pt-4">
+            {eventHooks.length === 0 ? (
+              <div className="text-center py-8 text-muted-foreground">
+                <Webhook className="w-12 h-12 mx-auto mb-3 opacity-30" />
+                <p className="text-sm">No event hooks configured</p>
+                <p className="text-xs mt-1">
+                  Add hooks to run commands or send webhooks when features complete
+                </p>
               </div>
-            ))}
+            ) : (
+              <div className="space-y-6">
+                {/* Group by trigger type */}
+                {Object.entries(hooksByTrigger).map(([trigger, hooks]) => (
+                  <div key={trigger} className="space-y-3">
+                    <h3 className="text-sm font-medium text-muted-foreground">
+                      {EVENT_HOOK_TRIGGER_LABELS[trigger as EventHookTrigger]}
+                    </h3>
+                    <div className="space-y-2">
+                      {hooks.map((hook) => (
+                        <HookCard
+                          key={hook.id}
+                          hook={hook}
+                          onEdit={() => handleEditHook(hook)}
+                          onDelete={() => handleDeleteHook(hook.id)}
+                          onToggle={(enabled) => handleToggleHook(hook.id, enabled)}
+                        />
+                      ))}
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
           </div>
-        )}
-      </div>
 
-      {/* Variable reference */}
-      <div className="px-6 pb-6">
-        <div className="rounded-lg bg-muted/30 p-4 text-xs text-muted-foreground">
-          <p className="font-medium mb-2">Available variables:</p>
-          <code className="text-[10px] leading-relaxed">
-            {'{{featureId}}'} {'{{featureName}}'} {'{{projectPath}}'} {'{{projectName}}'}{' '}
-            {'{{error}}'} {'{{timestamp}}'} {'{{eventType}}'}
-          </code>
-        </div>
-      </div>
+          {/* Variable reference */}
+          <div className="px-6 pb-6">
+            <div className="rounded-lg bg-muted/30 p-4 text-xs text-muted-foreground">
+              <p className="font-medium mb-2">Available variables:</p>
+              <code className="text-[10px] leading-relaxed">
+                {'{{featureId}}'} {'{{featureName}}'} {'{{projectPath}}'} {'{{projectName}}'}{' '}
+                {'{{error}}'} {'{{timestamp}}'} {'{{eventType}}'}
+              </code>
+            </div>
+          </div>
+        </TabsContent>
+
+        {/* History Tab */}
+        <TabsContent value="history" className="m-0">
+          <div className="p-6 pt-4">
+            <EventHistoryView />
+          </div>
+        </TabsContent>
+      </Tabs>
 
       {/* Dialog */}
       <EventHookDialog