feat: normalize email handling in signup, login, and verification processes; refactor event handling in task and reward components

backend/api/utils.py

@@ -1,9 +1,20 @@
 import jwt
+import re
 from flask import request, current_app, jsonify
 
 from events.sse import send_event_to_user
 
 
+def normalize_email(email: str) -> str:
+    """Normalize email for uniqueness checks (Gmail: remove dots and +aliases)."""
+    email = email.strip().lower()
+    if '@' not in email:
+        return email
+    local, domain = email.split('@', 1)
+    if domain in ('gmail.com', 'googlemail.com'):
+        local = local.split('+', 1)[0].replace('.', '')
+    return f"{local}@{domain}"
+
 def sanitize_email(email):
     return email.replace('@', '_at_').replace('.', '_dot_')