fix(quest): Handle 0 tasks

[cmp5987]

What type of PR is this?

/kind bug

What this PR does / why we need it:

• Sad face, we allowed a quest to get created with no beacons, no tasks got created
• UI assumed at least one task for a quest, this assumption was incorrect for current setup

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.24%. Comparing base (e216d53) to head (e1347a4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #728 +/- ## ========================================== + Coverage 66.27% 69.24% +2.96% ========================================== Files 179 179 Lines 12193 12732 +539 ========================================== + Hits 8081 8816 +735 + Misses 3885 3689 -196 Partials 227 227 ```

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