Refactor: Add workspace cache to CoreUtilsMixin

src/pyob/core_utils.py

@@ -138,6 +138,7 @@ class CoreUtilsMixin:
     target_dir: str
     memory_path: str
     key_cooldowns: dict[str, float]
+    _workspace_cache: dict[str, tuple[float, str]]
 
     def generate_pr_summary(self, rel_path: str, diff_text: str) -> dict:
         """Analyzes a git diff and returns a professional title and body for the PR."""

src/pyob/dashboard_server.py

@@ -232,7 +232,7 @@ def api_history_data():
         return jsonify({"success": False, "message": "History data not available"}), 404
 
 
-def read_file(filename):
+def read_file(filename: str) -> str:
     with open(filename, "r", encoding="utf-8") as f:
         return f.read()