Fix build hook to handle editable installs

Author: openhands-agent

build.py

@@ -3,13 +3,15 @@
 class CustomBuildHook(BuildHookInterface):
     def initialize(self, version, build_data):
         """Add agent package if not installing core-only."""
-        if 'wheel' not in build_data:
-            return
+        # Handle both wheel and editable builds
+        for build_type in ['wheel', 'editable']:
+            if build_type not in build_data:
+                continue
 
-        for target in build_data.get('wheel', {}).get('targets', []):
-            extras = target.get('options', {}).get('extras', [])
-            packages = target.get('packages', [])
-            
-            if 'core' not in extras and 'commit0.optional.agent' not in packages:
-                packages.append('commit0.optional.agent')
-                target['packages'] = packages
+            for target in build_data[build_type].get('targets', []):
+                extras = target.get('options', {}).get('extras', [])
+                packages = target.get('packages', [])
+                
+                if 'core' not in extras and 'commit0.optional.agent' not in packages:
+                    packages.append('commit0.optional.agent')
+                    target['packages'] = packages