fix pattern and role bugs (#1343)

## Description:

1. this.cosmetics.role_groups[groupName] was undefined causing an error
2. When logging out, reset the pattern. This was causing an unauthorized
pattern error because it persisted after log out.


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/server/Privilege.ts

@@ -40,7 +40,7 @@ export class PrivilegeChecker {
       if (
         roles !== undefined &&
         roles.some((role) =>
-          this.cosmetics.role_groups[groupName].includes(role),
+          this.cosmetics.role_groups[groupName]?.includes(role),
         )
       ) {
         // Player is in a role group for this pattern