feat: implement AI integration with backend configuration and rule-based enrichment actions

internal/api/server.go

@@ -77,6 +77,11 @@ func NewRouter(h *Handler, authService *auth.AuthService, staticDir string) http
 			r.Delete("/rules/{id}", h.DeleteRule)
 			r.Post("/rules/{id}/apply", h.ApplyRule)
 
+			// AI Settings
+			r.Get("/settings/ai", h.GetAISettings)
+			r.Put("/settings/ai", h.UpdateAISettings)
+			r.Post("/settings/ai/test", h.TestAIConnection)
+
 			// OPML
 			r.Post("/opml/import", h.ImportOPML)
 			r.Get("/opml/export", h.ExportOPML)