Remove redundant CSS properties from email templates

Co-authored-by: cadtoolbox <12723486+cadtoolbox@users.noreply.github.com>

backend/app/services/email_service.py

@@ -293,7 +293,7 @@ BamBuddy Team
         </div>
 
         <div style="text-align: center; margin: 30px 0;">
-            <a href="{login_url}" style="display: inline-block; background: #667eea; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
+            <a href="{login_url}" style="display: inline-block; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
         </div>
 
         <p style="font-size: 14px; color: #666; border-top: 1px solid #ddd; padding-top: 20px; margin-top: 20px;">
@@ -361,10 +361,10 @@ BamBuddy Team
         </div>
 
         <div style="text-align: center; margin: 30px 0;">
-            <a href="{login_url}" style="display: inline-block; background: #667eea; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
+            <a href="{login_url}" style="display: inline-block; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
         </div>
 
-        <div style="background: #fff3cd; background-color: #fff3cd; border: 1px solid #ffc107; border-radius: 4px; padding: 15px; margin: 20px 0;">
+        <div style="background-color: #fff3cd; border: 1px solid #ffc107; border-radius: 4px; padding: 15px; margin: 20px 0;">
             <p style="margin: 0; font-size: 14px; color: #856404;">
                 <strong>⚠️ Security Alert:</strong> If you did not request this password reset, please contact your administrator immediately.
             </p>
@@ -433,7 +433,7 @@ async def create_welcome_email_from_template(
         <div style="font-size: 16px;">{escaped_text_body}</div>
 
         <div style="text-align: center; margin: 30px 0;">
-            <a href="{login_url}" style="display: inline-block; background: #667eea; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
+            <a href="{login_url}" style="display: inline-block; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
         </div>
     </div>
 </body>
@@ -495,10 +495,10 @@ async def create_password_reset_email_from_template(
         <div style="font-size: 16px;">{escaped_text_body}</div>
 
         <div style="text-align: center; margin: 30px 0;">
-            <a href="{login_url}" style="display: inline-block; background: #667eea; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
+            <a href="{login_url}" style="display: inline-block; background-color: #667eea; color: #ffffff; padding: 12px 30px; text-decoration: none; border-radius: 4px; font-weight: bold;">Login Now</a>
         </div>
 
-        <div style="background: #fff3cd; background-color: #fff3cd; border: 1px solid #ffc107; border-radius: 4px; padding: 15px; margin: 20px 0;">
+        <div style="background-color: #fff3cd; border: 1px solid #ffc107; border-radius: 4px; padding: 15px; margin: 20px 0;">
             <p style="margin: 0; font-size: 14px; color: #856404;">
                 <strong>⚠️ Security Alert:</strong> If you did not request this password reset, please contact your administrator immediately.
             </p>