Support ZeroGPU Space runtime

app.py

@@ -9,6 +9,17 @@ import sys
 import html
 import gradio as gr
 
+# ZeroGPU Spaces require at least one GPU-decorated callable at startup. The
+# classifier itself is CPU-friendly, but the decorator lets this app run on
+# the existing ZeroGPU Space configuration. Keep a local fallback so tests
+# and ordinary CPU launches do not require the Spaces runtime package.
+try:
+    import spaces
+except ImportError:
+    class _LocalSpaces:
+        GPU = staticmethod(lambda function: function)
+    spaces = _LocalSpaces()
+
 # Ensure src modules are resolvable
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
@@ -52,6 +63,7 @@ SAMPLE_EMAILS = {
 }
 
 
+@spaces.GPU
 def classify_email(subject: str, body: str):
     """
     Primary Gradio callback function for classifying email threat levels.