Update Activity.vue

[SGBM-Jimbo]

Adds LOA next to user name if LOA is active and expires after the current date.

[ZAU-42]

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Summary

What does this PR do?

This closes issue #41.

DB Changes (if any)

• [] What is the change?

Adds (LOA) next to the user's name if they have active LOAs.

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Testing

1. Run all tests.
2. Additional testing requirements...

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Post-Deployment Validation

How to verify in the production environment.

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View a user on LOA. it should have (LOA) next to their name.

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