feat(settings): add response style presets

packages/ui/src/components/chat/ChatInput.tsx

@@ -72,6 +72,8 @@ import { buildSessionTargetOptions } from '@/sync/session-worktree-contract';
 import { usePermissionStore } from '@/stores/permissionStore';
 import { extractGitChangedFiles } from './changedFiles';
 import { useI18n } from '@/lib/i18n';
+import { fetchResponseStyleInstruction } from '@/lib/responseStyle';
+import { getSyncMessages } from '@/sync/sync-refs';
 
 const MAX_VISIBLE_TEXTAREA_LINES = 8;
 const EMPTY_QUEUE: QueuedMessage[] = [];
@@ -86,6 +88,10 @@ const VS_CODE_DROP_DATA_TYPES = [
     'text/plain',
 ];
 
+const hasUserMessages = (sessionId: string, directory?: string) => {
+    return getSyncMessages(sessionId, directory).some((message) => message.role === 'user');
+};
+
 const FILE_URI_PREFIX = 'file://';
 
 const encodeFilePath = (filepath: string): string => {
@@ -1547,6 +1553,20 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
             }
         }
 
+        const currentSessionDirectory = currentSessionId
+            ? useSessionUIStore.getState().getDirectoryForSession(currentSessionId) || currentDirectory
+            : currentDirectory;
+        const shouldAddResponseStyle = newSessionDraftOpen || (currentSessionId ? !hasUserMessages(currentSessionId, currentSessionDirectory) : false);
+        if (shouldAddResponseStyle) {
+            const responseStyleInstruction = await fetchResponseStyleInstruction().catch(() => null);
+            if (responseStyleInstruction) {
+                additionalParts.push({
+                    text: responseStyleInstruction,
+                    synthetic: true,
+                });
+            }
+        }
+
         // Collect all attachments for error recovery
         const allAttachments = [
             ...primaryAttachments,