tests: close remaining contract gaps (action-dispatch, org-headline-add/find-by-id, tangle-sync, create-note, messaging-link/unlink)

org/core-loop-act.org

@@ -336,4 +336,11 @@ Verifies that the act gate correctly processes an approved action and sets the s
                         :approved-action '(:target :cli :payload (:text "test")))))
     (loop-gate-act signal)
     (is (equal meta (getf signal :meta)))))
+
+(test test-action-dispatch-routes
+  "Contract 3: action-dispatch routes to registered actuators without crashing."
+  (actuator-initialize)
+  (let ((result (action-dispatch '(:type :REQUEST :target :system :payload (:action :eval :code "(+ 1 2)"))
+                                  '(:type :EVENT :depth 0))))
+    (is (numberp result) "eval should return a number")))
 #+end_src