Fix EffortLevel enum, Gradio 5 file handling, and add error checking

- Replace non-existent EffortLevel.MINIMAL with EffortLevel.MEDIUM
- Use file path string directly instead of file.name (Gradio 5 compat)
- Check result.error before displaying output
- Remove unused preview_csv function and asyncio import

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app.py

@@ -1,4 +1,3 @@
-import asyncio
 import os
 import tempfile
 
@@ -10,18 +9,11 @@ from everyrow.task import EffortLevel
 
 EFFORT_LEVELS = {
     "Low": EffortLevel.LOW,
-    "Minimal": EffortLevel.MINIMAL,
+    "Medium": EffortLevel.MEDIUM,
     "High": EffortLevel.HIGH,
 }
 
 
-def preview_csv(file):
-    if file is None:
-        return gr.update(visible=False), None
-    df = pd.read_csv(file.name)
-    return gr.update(visible=True), df
-
-
 async def run_agent_map(api_key, file, query, effort_label):
     if not api_key:
         raise gr.Error("Please enter your everyrow API key.")
@@ -32,7 +24,7 @@ async def run_agent_map(api_key, file, query, effort_label):
 
     os.environ["EVERYROW_API_KEY"] = api_key
 
-    df = pd.read_csv(file.name)
+    df = pd.read_csv(file)
     if df.empty:
         raise gr.Error("The uploaded CSV is empty.")
 
@@ -40,6 +32,9 @@ async def run_agent_map(api_key, file, query, effort_label):
 
     result = await agent_map(task=query, input=df, effort_level=effort_level)
 
+    if result.error:
+        raise gr.Error(f"agent_map failed: {result.error}")
+
     output_df = result.data
 
     tmp = tempfile.NamedTemporaryFile(
@@ -91,7 +86,7 @@ with gr.Blocks(title="everyrow research") as demo:
     def on_upload(file):
         if file is None:
             return gr.update(visible=False), gr.update(visible=False)
-        df = pd.read_csv(file.name)
+        df = pd.read_csv(file)
         return gr.update(visible=True), gr.update(value=df, visible=True)
 
     file.change(