feat: fix Cursor hook delivery and improve notify workflow

Route hook notifications through /dev/tty and client_tty so OSC reaches
Ghostty when Cursor captures stdout. Add afterAgentResponse hook, hook
logging, debounce, split test modes, and use directory name for titles.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/install/install_test.go

@@ -24,6 +24,10 @@ func TestMergeCursorHooks(t *testing.T) {
 	if len(stop) != 1 {
 		t.Fatalf("expected stop hook added")
 	}
+	resp := hooks["afterAgentResponse"].([]any)
+	if len(resp) != 1 {
+		t.Fatalf("expected afterAgentResponse hook added")
+	}
 }
 
 func TestMergeCursorHooksNoOverwrite(t *testing.T) {