feat: show raw provenance JSON on detail page

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

server.py

@@ -764,7 +764,23 @@ async def ui_detail_page(run_id: str):
         </div>
         '''
 
-    html += '''
+    # Raw JSON provenance
+    provenance_json = json.dumps({
+        "run_id": run.run_id,
+        "status": run.status,
+        "recipe": run.recipe,
+        "effect_url": effect_url,
+        "inputs": run.inputs,
+        "output_hash": run.output_hash,
+        "output_name": run.output_name,
+        "created_at": run.created_at,
+        "completed_at": run.completed_at,
+        "error": run.error
+    }, indent=2)
+
+    html += f'''
+        <h2>Raw JSON</h2>
+        <pre style="background:#0a0a0a;padding:16px;border-radius:8px;overflow-x:auto;font-size:13px;"><code>{provenance_json}</code></pre>
     </div>
     </div>
 </body>