fix: windows path and encoding adaptation

agent/memory/config.py

@@ -11,12 +11,18 @@ from typing import Optional, List
 from pathlib import Path
 
 
+def _default_workspace():
+    """Get default workspace path with proper Windows support"""
+    from common.utils import expand_path
+    return expand_path("~/cow")
+
+
 @dataclass
 class MemoryConfig:
     """Configuration for memory storage and search"""
     
     # Storage paths (default: ~/cow)
-    workspace_root: str = field(default_factory=lambda: os.path.expanduser("~/cow"))
+    workspace_root: str = field(default_factory=_default_workspace)
     
     # Embedding config
     embedding_provider: str = "openai"  # "openai" | "local"

agent/memory/manager.py

@@ -304,7 +304,7 @@ class MemoryManager:
     ):
         """Sync a single file"""
         # Compute file hash
-        content = file_path.read_text()
+        content = file_path.read_text(encoding='utf-8')
         file_hash = MemoryStorage.compute_hash(content)
         
         # Get relative path