fix: preserve native model switches and bound project searches

apps/desktop/assets/codex-bridge/compression_engine.py

@@ -180,9 +180,13 @@ def prepare(handler, module, payload, checkpoints):
     slug = original.get('model', '')
     external = module.ek_model_mu(slug)
     source_model = payload.get('source_model') or ''
+    if not external and gc.native_opaque(original):
+        # Defense in depth for direct/older splitter callers. Native encrypted
+        # state never enters owner decoding or cross-provider summarization.
+        return {'request': gc.normalize(original)}
     # Defense in depth: an accidental worker call cannot alter native-only history.
-    if not external and not module.ek_model_mu(source_model) and not gc.foreign(original):
-        return {'request': copy.deepcopy(original), 'window': handler._transfer_window(slug)}
+    if not external and not module.ek_model_mu(source_model) and not gc.foreign_history(original):
+        return {'request': gc.normalize(original)}
     settings = settings_store.read(module.HOME)
     actual = (module.yonlendirilen(str(original.get('prompt_cache_key') or ''), slug) or slug) if external else slug
     window = handler._transfer_window(actual)