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🔒 Firestore Security Rules are blocking access — fix in 60 seconds:
1. Go to console.firebase.google.com → select project calendar-685e3
2. Left sidebar → Firestore Database → click Rules tab at the top
3. Delete everything and paste this, then click Publish: rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write: if true;
}
}
}