fix: sécuriser shutdown, config par défaut et reconnexion socket

Co-authored-by: aider (openrouter/openai/gpt-5.3-codex) <aider@aider.chat>

internal/capture/capture_test.go

@@ -79,3 +79,20 @@ func TestJoinString(t *testing.T) {
 func TestCaptureIntegration(t *testing.T) {
 	t.Skip("Skipping integration test requiring network access and elevated privileges")
 }
+
+func TestClose_NoHandle_NoError(t *testing.T) {
+	c := New()
+	if err := c.Close(); err != nil {
+		t.Fatalf("Close() error = %v", err)
+	}
+}
+
+func TestClose_Idempotent_NoHandle(t *testing.T) {
+	c := New()
+	if err := c.Close(); err != nil {
+		t.Fatalf("first Close() error = %v", err)
+	}
+	if err := c.Close(); err != nil {
+		t.Fatalf("second Close() error = %v", err)
+	}
+}