chore: fix some Typescript issues

[susnux]

Fix some Typescript issues I noticed while testing the other pull requests.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 27 lines in your changes missing coverage. Please review.

Project coverage is 2.30%. Comparing base (279c59f) to head (7801c75).
Report is 128 commits behind head on master.

Files with missing lines	Patch %	Lines
src/views/TagContent.vue	0.00%	9 Missing ⚠️
src/views/UnassignedFaces.vue	0.00%	8 Missing ⚠️
src/views/Tags.vue	0.00%	4 Missing ⚠️
src/views/Timeline.vue	0.00%	4 Missing ⚠️
src/store/userConfig.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #2963      +/-   ##
=========================================
- Coverage    2.31%   2.30%   -0.01%     
=========================================
  Files          98      98              
  Lines        6190    6193       +3     
  Branches      112     112              
=========================================
  Hits          143     143              
- Misses       6047    6050       +3     

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[artonge]

Might be merged after #2945. But don't want to have to deal with conflict for now :).