Handle CLI request errors and backend whisper timeout

cli/tests/test_main.py

@@ -44,3 +44,20 @@ def test_format_http_error_with_empty_body() -> None:
     response = httpx.Response(500, text="", request=request)
     message = main.format_http_error(response, "http://localhost:8000/transcriptions")
     assert message == "HTTP 500 from http://localhost:8000/transcriptions: <empty response body>"
+
+
+def test_format_request_error_timeout() -> None:
+    request = httpx.Request("POST", "http://localhost:8000/transcriptions")
+    exc = httpx.ReadTimeout("read timed out", request=request)
+    message = main.format_request_error(exc, "http://localhost:8000/transcriptions")
+    assert message == "Request to http://localhost:8000/transcriptions timed out."
+
+
+def test_format_request_error_network_failure() -> None:
+    request = httpx.Request("POST", "http://localhost:8000/transcriptions")
+    exc = httpx.ConnectError("connection refused", request=request)
+    message = main.format_request_error(exc, "http://localhost:8000/transcriptions")
+    assert (
+        message
+        == "Request to http://localhost:8000/transcriptions failed: connection refused"
+    )