fix(frontend): 以前のpopupの呼び出し方を修正

[kakkokari-gtyih]

What

Why

Additional info (optional)

Checklist

• [ ] Read the contribution guide
• [ ] Test working in a local environment
• [ ] (If needed) Add story of storybook
• [ ] (If needed) Update CHANGELOG.md
• [ ] (If possible) Add tests

[syuilo]

🙏🏿

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 20.02%. Comparing base (c0de57c) to head (d16c77d). Report is 2 commits behind head on develop.

Files	Patch %	Lines
packages/frontend/src/pages/flash/flash.vue	0.00%	4 Missing :warning:
packages/frontend/src/pages/gallery/post.vue	0.00%	4 Missing :warning:
packages/frontend/src/pages/page.vue	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #14421 +/- ## ============================================ - Coverage 38.75% 20.02% -18.73% ============================================ Files 1547 725 -822 Lines 190878 100466 -90412 Branches 3263 1052 -2211 ============================================ - Hits 73969 20121 -53848 + Misses 116310 79801 -36509 + Partials 599 544 -55 ```

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