fix: bootstrap embedded chat prompting state and review read-only handling

Pass initial subagent prompting settings into embedded chat URLs and views
Prevent inactive embedded chats from stealing focus on load
Treat review sessions as independent conversations when resolving prompt read-only state

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

@@ -221,6 +221,7 @@ const MemoStatusRow = React.memo(StatusRow);
 interface ChatInputProps {
     onOpenSettings?: () => void;
     scrollToBottom?: () => void;
+    active?: boolean;
 }
 
 const resolveChatDraftIdentity = (sessionId: string | null): ChatDraftIdentity | null => {
@@ -234,7 +235,7 @@ const resolveChatDraftIdentity = (sessionId: string | null): ChatDraftIdentity |
     return createChatDraftIdentity(getRuntimeKey(), directory, sessionId);
 };
 
-const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollToBottom }) => {
+const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollToBottom, active = true }) => {
     const { t } = useI18n();
     // Track if we restored a draft on mount (for text selection)
     const initialDraftRef = React.useRef<string | null>(null);
@@ -2039,10 +2040,10 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
 
     React.useEffect(() => {
 
-        if (currentSessionId && composerRef.current && !isMobile) {
+        if (active && currentSessionId && composerRef.current && !isMobile) {
             composerRef.current.focus();
         }
-    }, [currentSessionId, isMobile]);
+    }, [active, currentSessionId, isMobile]);
 
     React.useEffect(() => {
         if (!isMobile) {