feat(chat): auto-detect text direction for RTL languages (#729)

Add dir="auto" to chat message content and composer textarea so
Persian and Arabic text automatically renders right-to-left
while English and other LTR text remains unaffected.

Co-authored-by: Haile <118998054+blackmammoth@users.noreply.github.com>

src/components/chat/view/subcomponents/ChatComposer.tsx

@@ -295,6 +295,7 @@ export default function ChatComposer({
 
             <PromptInputTextarea
               ref={textareaRef}
+              dir="auto"
               value={input}
               onChange={onInputChange}
               onClick={onTextareaClick}

src/components/chat/view/subcomponents/MessageComponent.tsx

@@ -120,7 +120,7 @@ const MessageComponent = memo(({ message, prevMessage, createDiff, onFileOpen, o
         /* User message bubble on the right */
         <div className="flex w-full items-end space-x-0 sm:w-auto sm:max-w-[85%] sm:space-x-3 md:max-w-md lg:max-w-lg xl:max-w-xl">
           <div className="group flex-1 rounded-2xl rounded-br-md bg-blue-600 px-3 py-2 text-white shadow-sm sm:flex-initial sm:px-4">
-            <div className="whitespace-pre-wrap break-words text-sm">
+            <div dir="auto" className="whitespace-pre-wrap break-words text-sm">
               {message.content}
             </div>
             {message.images && message.images.length > 0 && (
@@ -405,7 +405,7 @@ const MessageComponent = memo(({ message, prevMessage, createDiff, onFileOpen, o
                 </ReasoningContent>
               </Reasoning>
             ) : (
-              <div className="text-sm text-gray-700 dark:text-gray-300">
+              <div dir="auto" className="text-sm text-gray-700 dark:text-gray-300">
                 {/* Reasoning accordion */}
                 {showThinking && message.reasoning && (
                   <Reasoning className="mb-3" defaultOpen={false}>