chore: Perform codebase cleanup and refactor App state management

backend/src/ea_chatbot/api/routers/agent.py

@@ -9,6 +9,7 @@ from ea_chatbot.graph.checkpoint import get_checkpointer
 from ea_chatbot.history.models import User as UserDB, Conversation
 from ea_chatbot.history.utils import map_db_messages_to_langchain
 from ea_chatbot.api.schemas import ChatRequest
+from ea_chatbot.utils.plots import fig_to_bytes
 import io
 import base64
 from langchain_core.runnables.config import RunnableConfig
@@ -90,9 +91,7 @@ async def stream_agent_events(
                         plots = output["plots"]
                         encoded_plots: list[str] = []
                         for fig in plots:
-                            buf = io.BytesIO()
-                            fig.savefig(buf, format="png")
-                            plot_bytes = buf.getvalue()
+                            plot_bytes = fig_to_bytes(fig)
                             assistant_plots.append(plot_bytes)
                             encoded_plots.append(base64.b64encode(plot_bytes).decode('utf-8'))
                         output_event["data"]["encoded_plots"] = encoded_plots

backend/src/ea_chatbot/app.py

@@ -6,6 +6,7 @@ from ea_chatbot.graph.workflow import app
 from ea_chatbot.graph.state import AgentState
 from ea_chatbot.utils.logging import get_logger
 from ea_chatbot.utils.helpers import merge_agent_state
+from ea_chatbot.utils.plots import fig_to_bytes
 from ea_chatbot.config import Settings
 from ea_chatbot.history.manager import HistoryManager
 from ea_chatbot.auth import OIDCClient, AuthType, get_user_auth_type
@@ -419,9 +420,7 @@ def main():
                 for fig in final_state["plots"]:
                     st.pyplot(fig)
                     # Convert fig to bytes
-                    buf = io.BytesIO()
-                    fig.savefig(buf, format="png")
-                    plot_bytes_list.append(buf.getvalue())
+                    plot_bytes_list.append(fig_to_bytes(fig))
             
             if final_state.get("dfs"):
                 for df_name, df in final_state["dfs"].items():

backend/src/ea_chatbot/auth.py

@@ -162,16 +162,6 @@ class OIDCClient:
         except JWTError as e:
             raise ValueError(f"ID Token validation failed: {str(e)}")
 
-    def get_login_url(self) -> str:
-        """Legacy method for generating simple authorization URL."""
-        metadata = self.fetch_metadata()
-        authorization_endpoint = metadata.get("authorization_endpoint")
-        if not authorization_endpoint:
-            raise ValueError("authorization_endpoint not found in OIDC metadata")
-        
-        uri, state = self.oauth_session.create_authorization_url(authorization_endpoint)
-        return uri
-
     def exchange_code_for_token(self, code: str, code_verifier: Optional[str] = None) -> Dict[str, Any]:
         """Exchange the authorization code for an access token, optionally using PKCE verifier."""
         metadata = self.fetch_metadata()

backend/src/ea_chatbot/config.py

@@ -19,7 +19,7 @@ class Settings(BaseSettings):
     data_dir: str = "data"
     data_state: str = "new_jersey"
     log_level: str = Field(default="INFO", alias="LOG_LEVEL")
-    dev_mode: bool = Field(default=True, alias="DEV_MODE")
+    dev_mode: bool = Field(default=False, alias="DEV_MODE")
     frontend_url: str = Field(default="http://localhost:5173", alias="FRONTEND_URL")
     
     # Voter Database configuration

backend/src/ea_chatbot/utils/plots.py

@@ -0,0 +1,17 @@
+import io
+import matplotlib.pyplot as plt
+
+def fig_to_bytes(fig: plt.Figure, format: str = "png") -> bytes:
+    """
+    Convert a Matplotlib figure to bytes.
+    
+    Args:
+        fig: The Matplotlib figure to convert.
+        format: The image format to use (default: "png").
+        
+    Returns:
+        bytes: The image data.
+    """
+    buf = io.BytesIO()
+    fig.savefig(buf, format=format)
+    return buf.getvalue()