Fix quote submission bug and update copyright notice

- Fixed config access in submit route (config.min_quote_length -> config.get('quotes.min_length'))
- Fixed Flask-Limiter initialization syntax
- Reduced minimum quote length from 10 to 1 character
- Updated copyright notice from '© ircquotes 2024, All Rights Reserved.' to '@ ircquotes 2024-2025'
- Quote submission now works properly with correct status assignment (pending/approved)
- Quotes are properly created with status=0 (pending) when auto_approve=false

templates/login.html

@@ -93,7 +93,7 @@
             </tr>
         </table>
 
-        <font size="-1">&#169; ircquotes 2024, All Rights Reserved.</font>
+        <font size="-1">@ ircquotes 2024-2025</font>
     </center>
 
 </body>