Attach image e2e tests (#301)

src/components/chat/ChatInput.tsx

@@ -253,7 +253,7 @@ export function ChatInput({ chatId }: { chatId?: number }) {
           Error loading proposal: {proposalError}
         </div>
       )}
-      <div className="p-4">
+      <div className="p-4" data-testid="chat-input-container">
         <div
           className={`relative flex flex-col border border-border rounded-lg bg-(--background-lighter) shadow-sm ${
             isDraggingOver ? "ring-2 ring-blue-500 border-blue-500" : ""

src/components/chat/HomeChatInput.tsx

@@ -79,7 +79,7 @@ export function HomeChatInput({
 
   return (
     <>
-      <div className="p-4">
+      <div className="p-4" data-testid="home-chat-input-container">
         <div
           className={`relative flex flex-col space-y-2 border border-border rounded-lg bg-(--background-lighter) shadow-sm ${
             isDraggingOver ? "ring-2 ring-blue-500 border-blue-500" : ""