fix: improve context panel session visibility

Marks active embedded chat sessions as seen only while focused
Shows real session titles for context panel chat tabs
Names review sessions after the implementation session

packages/ui/src/components/session/sidebar/SessionNodeItem.tsx

@@ -82,7 +82,7 @@ type Props = {
   removeSessionFromFolder: (scopeKey: string, sessionId: string) => void;
   addSessionToFolder: (scopeKey: string, folderId: string, sessionId: string) => void;
   createFolderAndStartRename: (scopeKey: string, parentId?: string | null) => { id: string } | null;
-  openContextPanelTab: (directory: string, options: { mode: 'chat'; dedupeKey: string; label: string; readOnly?: boolean }) => void;
+  openContextPanelTab: (directory: string, options: { mode: 'chat'; dedupeKey: string; label: string; sessionTitleFallback?: string; readOnly?: boolean }) => void;
   handleDeleteSession: (session: Session, source?: { archivedBucket?: boolean; hardDelete?: boolean; skipConfirm?: boolean }) => void;
   mobileVariant: boolean;
   alwaysShowActions: boolean;
@@ -867,6 +867,7 @@ function SessionNodeItemComponent(props: Props): React.ReactNode {
               mode: 'chat',
               dedupeKey: `session:${session.id}`,
               label: sessionTitle,
+              sessionTitleFallback: sessionTitle,
             });
           }}
           className="[&>svg]:mr-1"