Preserve timeout conversion errors in client validation

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

hyperbrowser/client/timeout_utils.py

@@ -17,7 +17,10 @@ def validate_timeout_seconds(timeout: Optional[float]) -> Optional[float]:
     try:
         normalized_timeout = float(timeout)
     except (TypeError, ValueError, OverflowError) as exc:
-        raise HyperbrowserError("timeout must be finite") from exc
+        raise HyperbrowserError(
+            "timeout must be finite",
+            original_error=exc,
+        ) from exc
     try:
         is_finite = math.isfinite(normalized_timeout)
     except (TypeError, ValueError, OverflowError):

tests/test_client_timeout.py

@@ -119,10 +119,14 @@ def test_async_client_rejects_non_finite_timeout(invalid_timeout: float):
 
 
 def test_sync_client_rejects_overflowing_real_timeout():
-    with pytest.raises(HyperbrowserError, match="timeout must be finite"):
+    with pytest.raises(HyperbrowserError, match="timeout must be finite") as exc_info:
         Hyperbrowser(api_key="test-key", timeout=Fraction(10**1000, 1))
 
+    assert exc_info.value.original_error is not None
+
 
 def test_async_client_rejects_overflowing_real_timeout():
-    with pytest.raises(HyperbrowserError, match="timeout must be finite"):
+    with pytest.raises(HyperbrowserError, match="timeout must be finite") as exc_info:
         AsyncHyperbrowser(api_key="test-key", timeout=Fraction(10**1000, 1))
+
+    assert exc_info.value.original_error is not None