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/notify/send_hook_test.go

@@ -0,0 +1,34 @@
+package notify
+
+import "testing"
+
+func TestHookMethodsSkipStdoutWhenNotTTY(t *testing.T) {
+	methods := hookMethods(true, true, "/dev/pts/1")
+	if len(methods) < 2 {
+		t.Fatalf("expected hook methods, got %v", methods)
+	}
+	if methods[0] != MethodControllingTTYRaw {
+		t.Fatalf("expected controlling tty first, got %v", methods)
+	}
+	for _, m := range methods {
+		if m == MethodPassthroughStdout || m == MethodDirectStdout {
+			t.Fatalf("stdout methods should not appear without terminal stdout, got %v", methods)
+		}
+	}
+}
+
+func TestHookMethodsIncludeStdoutWhenTTY(t *testing.T) {
+	if !stdoutIsTerminal() {
+		t.Skip("stdout is not a terminal in test runner")
+	}
+	methods := hookMethods(true, false, "/dev/pts/1")
+	found := false
+	for _, m := range methods {
+		if m == MethodPassthroughStdout {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("expected passthrough stdout in manual mode, got %v", methods)
+	}
+}