Fix prompt formatting in Observation and add static method to Study class (#110)

Author: recursix

src/agentlab/agents/dynamic_prompting.py

@@ -443,7 +443,7 @@ def shrink(self):
     def _prompt(self) -> str:
         return f"""
 # Observation of current step:
-{self.tabs}{self.html.prompt}{self.ax_tree.prompt}{self.focused_element.prompt}{self.error.prompt}
+{self.tabs.prompt}{self.html.prompt}{self.ax_tree.prompt}{self.focused_element.prompt}{self.error.prompt}
 
 """
 

src/agentlab/experiments/study.py

@@ -246,6 +246,7 @@ def get_report(self, ignore_cache=False, ignore_stale=False):
             self.dir, ignore_cache=ignore_cache, ignore_stale=ignore_stale
         )
 
+    @staticmethod
     def load(dir: Path) -> "Study":
         dir = Path(dir)
         study_path = dir / "study.pkl.gz"