test: Add edge case for capturePublicURLFromRequest nil inputs

Tests the early return paths when router, request, or config are nil.

internal/api/router_test.go

@@ -780,3 +780,27 @@ func TestCanCapturePublicURL_NilInputs(t *testing.T) {
 		})
 	}
 }
+
+func TestCapturePublicURLFromRequest_NilInputs(t *testing.T) {
+	t.Parallel()
+
+	t.Run("nil router", func(t *testing.T) {
+		var r *Router
+		req := httptest.NewRequest(http.MethodGet, "/", nil)
+		// Should not panic
+		r.capturePublicURLFromRequest(req)
+	})
+
+	t.Run("nil request", func(t *testing.T) {
+		r := &Router{config: &config.Config{}}
+		// Should not panic
+		r.capturePublicURLFromRequest(nil)
+	})
+
+	t.Run("nil config", func(t *testing.T) {
+		r := &Router{config: nil}
+		req := httptest.NewRequest(http.MethodGet, "/", nil)
+		// Should not panic
+		r.capturePublicURLFromRequest(req)
+	})
+}