fix(chats): align folders and session actions

Render managed Chats through the shared folder-aware session group and keep folder ownership at the Chats root, including new drafts and older per-directory scopes.

Hide worktree actions for Chats, make worktree shortcuts inert on Chat drafts, and let new-session shortcuts inherit an active session directory while explicit Chats controls still create managed Chat drafts.

packages/ui/src/hooks/useMiniChatKeyboardShortcuts.ts

@@ -34,7 +34,10 @@ export const useMiniChatKeyboardShortcuts = () => {
 
       if (eventMatchesShortcut(event, combo('new_chat'))) {
         event.preventDefault();
-        openNewSessionDraft();
+        const sessionState = useSessionUIStore.getState();
+        openNewSessionDraft(sessionState.currentSessionId && sessionState.currentSessionDirectory
+          ? { directoryOverride: sessionState.currentSessionDirectory }
+          : undefined);
         focusChatInput();
         return;
       }