Enhance error handling in generate_image function to provide more specific feedback for API authentication and network errors.

app.py

@@ -63,12 +63,20 @@ def generate_image(
         else:
             raise gr.Error("No image data received from the API")
 
+    except openai.AuthenticationError:
+        raise gr.Error("Invalid API key. Please check your OpenAI API key and try again.")
     except openai.APIError as e:
-        raise gr.Error(f"OpenAI API error: {str(e)}")
-    except requests.RequestException as e:
-        raise gr.Error(f"Network error: {str(e)}")
+        error_msg = str(e)
+        if "api_key" in error_msg.lower():
+            raise gr.Error("API authentication error. Please check your credentials.")
+        else:
+            raise gr.Error("OpenAI API error occurred. Please try again.")
+    except requests.RequestException:
+        raise gr.Error("Network error occurred while downloading the image. Please try again.")
     except Exception as e:
-        raise gr.Error(f"An unexpected error occurred: {str(e)}")
+        # Log the full error internally but show a generic message to the user
+        print(f"Internal error: {type(e).__name__}")  # Log error type without sensitive data
+        raise gr.Error("An unexpected error occurred. Please try again.")
 
 
 css = """