refactor: add primitives, plan mode display, and new session model selector

src/contexts/PermissionContext.tsx

@@ -0,0 +1,19 @@
+import { createContext, useContext } from 'react';
+
+import type { PendingPermissionRequest } from '../components/chat/types/types';
+
+export interface PermissionContextValue {
+  pendingPermissionRequests: PendingPermissionRequest[];
+  handlePermissionDecision: (
+    requestIds: string | string[],
+    decision: { allow?: boolean; message?: string; rememberEntry?: string | null; updatedInput?: unknown },
+  ) => void;
+}
+
+const PermissionContext = createContext<PermissionContextValue | null>(null);
+
+export function usePermission(): PermissionContextValue | null {
+  return useContext(PermissionContext);
+}
+
+export default PermissionContext;