diff --git a/frontend/chat-ui/src/components/InputBox.jsx b/frontend/chat-ui/src/components/InputBox.jsx
index ee7fbce..c5d1926 100644
--- a/frontend/chat-ui/src/components/InputBox.jsx
+++ b/frontend/chat-ui/src/components/InputBox.jsx
@@ -67,7 +67,7 @@ export default function InputBox() {
   };
 
   return (
-    <div className="p-2 border-t flex items-center space-x-2">
+    <div className="p-2 border-t flex flex-wrap items-center gap-2 w-full">
       <input
         ref={fileInputRef}
         type="file"
diff --git a/frontend/chat-ui/src/components/ModeSelectorDemo.jsx b/frontend/chat-ui/src/components/ModeSelectorDemo.jsx
index cafd93b..3be190b 100644
--- a/frontend/chat-ui/src/components/ModeSelectorDemo.jsx
+++ b/frontend/chat-ui/src/components/ModeSelectorDemo.jsx
@@ -585,11 +585,24 @@ function ChatComposer() {
         dispatch({ type: "SET_RESULTS", results: { text: `You said: ${q}\n\n(Connect your backend to replace this mock.)` } });
       } else if (state.mode === "deep") {
         dispatch({ type: "DEEP_START" });
-        const res = await deepResearch(q, (stage, log) => {
-          dispatch({ type: "DEEP_SET_STAGE", stage, log });
-        });
-        dispatch({ type: "SET_RESULTS", results: { text: res.text, citations: res.citations } });
-        dispatch({ type: "DEEP_STOP" });
+    try {
+          const res = await deepResearch(q, (stage, log) => {
+            dispatch({ type: "DEEP_SET_STAGE", stage, log });
+          });
+          dispatch({ type: "SET_RESULTS", results: { text: res.text, citations: res.citations } });
+        } catch (err) {
+          dispatch({
+            type: "ADD_TOAST",
+            toast: {
+              id: uid("toast"),
+              title: "Research failed",
+              desc: err.message ?? String(err),
+              kind: "error",
+            },
+          });
+        } finally {
+          dispatch({ type: "DEEP_STOP" });
+        }
       } else if (state.mode === "image") {
         const images = await imageGen(q, state.files);
         dispatch({ type: "SET_RESULTS", results: { images } });
diff --git a/frontend/chat-ui/src/components/ProfileMenu.jsx b/frontend/chat-ui/src/components/ProfileMenu.jsx
index 72ada21..e5f3654 100644
--- a/frontend/chat-ui/src/components/ProfileMenu.jsx
+++ b/frontend/chat-ui/src/components/ProfileMenu.jsx
@@ -10,16 +10,25 @@ export default function ProfileMenu() {
 
   return (
     <div
-      className="fixed bottom-2 right-4 z-10"
-      className="fixed bottom-2 transition-all"
-      style={{ left: state.sidebarOpen ? '15.5rem' : '0.5rem' }}
+      className={`fixed bottom-2 z-10 transition-all ${state.sidebarOpen ? 'left-64' : 'left-2'}`}
     >
-      <button className="p-2 rounded-full" onClick={() => setOpen((o) => !o)} title="Profile">
+      <button 
+      className="p-2 rounded-full" 
+      onClick={() => setOpen((o) => !o)}
+      title="Profile"
+      aria-expanded={open}
+      aria-controls="profile-menu"
+      >
         ⚙️
       </button>
       {open && (
-        <div className="mt-2 p-2 border rounded bg-white dark:bg-gray-800 shadow space-y-2">
-          <button className="block w-full text-left" onClick={toggleTheme}>Toggle Theme</button>
+        <div
+          id="profile-menu"
+          className="mt-2 p-2 border rounded bg-white dark:bg-gray-800 shadow space-y-2"
+        >
+          <button className="block w-full text-left" onClick={toggleTheme}>
+            Toggle Theme
+          </button>
           <button className="block w-full text-left" onClick={toggleMemory}>
             Memory: {state.memory ? 'On' : 'Off'}
           </button>