Add Claude integration to dashboard

Add comprehensive Claude Code monitoring and realtime streaming to the K8s dashboard.
Includes API endpoints for health, stats, summary, inventory, and live event streaming.
Frontend provides overview, usage, inventory, debug, and live feed views.

dashboard/internal/claude/events.go

@@ -0,0 +1,19 @@
+package claude
+
+import "time"
+
+type EventType string
+
+const (
+	EventTypeHistoryAppend EventType = "history.append"
+	EventTypeFileChanged   EventType = "file.changed"
+	EventTypeServerNotice  EventType = "server.notice"
+	EventTypeServerError   EventType = "server.error"
+)
+
+type Event struct {
+	ID   int64     `json:"id"`
+	TS   time.Time `json:"ts"`
+	Type EventType `json:"type"`
+	Data any       `json:"data"`
+}