Apply reverted PRs by reverting Nextification

[xicri]

Some PRs were reverted by #115, but they should be applied again after migration to Nuxt 3.

The following PRs should be manually applied after migration to Nuxt 3:

• [x] #106 → #126
• [x] #107 → #127
• [x] #108 → #117
• [x] #110 → #118
• [ ] #111
• [ ] #112
• [ ] #114

Check if the following PRs should be applied manually after the migration to Nuxt 3:

• [ ] #101
• [ ] #105