Fix API URL undefined error and rebrand to ChatSmith

backend/app/main.py

@@ -64,7 +64,8 @@ def get_application() -> FastAPI:
                     <script>
                         window.__ENV__ = {{
                             VITE_SUPABASE_URL: "{supabase_url}",
-                            VITE_SUPABASE_ANON_KEY: "{supabase_key}"
+                            VITE_SUPABASE_ANON_KEY: "{supabase_key}",
+                            VITE_API_BASE_URL: "/api"
                         }};
                     </script>
                     """

frontend/src/App.jsx

@@ -1,7 +1,14 @@
 import { useRef, useState } from "react";
 import { supabase } from "./supabaseClient";
 
-const API_BASE_URL = import.meta.env.VITE_API_BASE_URL;
+const getEnv = (key) => {
+  if (typeof window !== "undefined" && window.__ENV__ && window.__ENV__[key]) {
+    return window.__ENV__[key];
+  }
+  return import.meta.env[key];
+};
+
+const API_BASE_URL = getEnv("VITE_API_BASE_URL") || "/api";
 
 const Panel = ({ title, subtitle, children }) => (
   <div className="card">
@@ -283,7 +290,7 @@ export default function App() {
   const Header = () => (
     <header className="hero">
       <div>
-        <h1>ChatSMITH</h1>
+        <h1>ChatSmith</h1>
         <p className="muted">
           {firstNameDisplay
             ? `Welcome, ${firstNameDisplay}`