Fix SyntaxError; simplify debug; stage repo zip; make packages.txt empty

app.py

@@ -2534,6 +2534,24 @@ def debug_compile_uploaded_zip(zip_file):
 
 def debug_compile_output_zip():
     """Compile the repo-root output.zip (a real LaTeX project) and preview the resulting PDF."""
+    # Stage repo output.zip to runs/<id>/output.zip to follow pipeline layout, then delegate
+    zip_path = ROOT / "output.zip"
+    if not zip_path.exists():
+        return (
+            "<div style='color:#b00'><b>output.zip not found at repo root.</b></div>"
+            + f"<div>Expected at: {zip_path}</div>"
+        )
+    logs = [f"🐞 Stage(repo zip) at {_now_str()}"]
+    _, WORK_DIR, LOG_PATH, ZIP_PATH = _prepare_workspace(logs)
+    try:
+        shutil.copy2(zip_path, ZIP_PATH)
+        logs.append(f"📦 Staged repo output.zip → runs/{WORK_DIR.name}/output.zip")
+        _write_logs(LOG_PATH, logs)
+    except Exception as e:
+        logs.append(f"❌ Failed staging output.zip: {e}")
+        _write_logs(LOG_PATH, logs)
+        return "<div style='color:#b00'>Failed to stage output.zip</div>"
+    return debug_compile_last_pipeline_zip()
     logs = [f"🐞 Debug(real) at {_now_str()}"]
     zip_path = ROOT / "output.zip"
     if not zip_path.exists():
@@ -2645,7 +2663,18 @@ def debug_compile_last_pipeline_zip():
     logs = [f"🐞 Debug(last-pipeline-zip) at {_now_str()}"]
     last_zip = _find_last_pipeline_zip()
     if not last_zip:
-        return "<div style='color:#b00'>No recent pipeline output.zip found under runs/.</div>"
+        repo_zip = ROOT / "output.zip"
+        if repo_zip.exists():
+            try:
+                _, W, L, Z = _prepare_workspace(logs)
+                shutil.copy2(repo_zip, Z)
+                logs.append(f"📦 Auto-staged repo output.zip → runs/{W.name}/output.zip")
+                last_zip = Z
+            except Exception as e:
+                logs.append(f"❌ Auto-stage failed: {e}")
+                return "<div style='color:#b00'>No recent pipeline output.zip found and auto-stage failed.</div>"
+        else:
+            return "<div style='color:#b00'>No recent pipeline output.zip found under runs/.</div>"
 
     # Prepare workspace
     run_id, WORK_DIR, LOG_PATH, _ = _prepare_workspace(logs)