Add initial JSON data files and implement core page components for game functionality

app/ViewModel/useManagePrivateSubtaskViewModel.js

@@ -0,0 +1,56 @@
+import { useState } from 'react';
+import { createPrivateGame, joinAsAdmin } from '../API/API';
+import { getSession, setSessionGroup } from '../Model/SessionStore';
+
+const useManagePrivateSubtaskViewModel = () => {
+  const [businessOrSchoolName, setBusinessOrSchoolName] = useState('');
+  const [error, setError] = useState('');
+
+  const createNewPrivateGame = async () => {
+    setError('');
+    const { currentUid } = getSession();
+    try {
+      const group = await createPrivateGame({
+        userId: currentUid,
+        groupName: businessOrSchoolName.trim() || 'New Private Game',
+        businessOrSchoolName: businessOrSchoolName.trim() || 'Unnamed Business',
+        isBusiness: true,
+      });
+      setSessionGroup(group.Gid, 0);
+      return group;
+    } catch (e) {
+      setError(e.message);
+      return null;
+    }
+  };
+
+  const joinAdminForPrivate = async () => {
+    setError('');
+    const { currentUid } = getSession();
+    try {
+      const response = await joinAsAdmin({
+        userId: currentUid,
+        businessOrSchoolName: businessOrSchoolName.trim(),
+      });
+      const gid = response?.Gid ?? null;
+      if (gid !== null) {
+        setSessionGroup(gid, 0);
+      }
+      return response;
+    } catch (e) {
+      setError(e.message);
+      return null;
+    }
+  };
+
+  return {
+    businessOrSchoolName,
+    error,
+    setBusinessOrSchoolName,
+    createNewPrivateGame,
+    joinAdminForPrivate,
+  };
+};
+
+export default useManagePrivateSubtaskViewModel;
+