fix: optimize imports and clean up AppRouter.js

[archx3]

This update improves code readability and efficiency by reordering import statements and cleaning up the main AppRouter.js component. Useless sections of code were removed and empty line spaces were added for clarity. Additionally, the URLs configuration was updated to enhance routing process.

Summary / Highlights

The safari browser detection condition and the code block to redirect users to the generic domain name when on a custom domain has been removed. Fixes #1336

Details (Give details about what this PR accomplishes, include any screenshots etc.)

Testing Steps (Provide details on how your changes can be tested)

Requirements

• [x] I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• [x] I've tested my changes manually.
• [ ] I've added unit tests to my PR.

Transparency (Project board)

• [x] I've given my PR a meaningful title.
• [x] I linked this PR to the relevant issue.
• [x] I moved the linked issue from the "Sprint backlog" to "In progress" when I started this.
• [ ] I moved the linked issue to "QA Verification" now that it is ready to merge.

What kind of change does this PR introduce? (check at least one)

• [x] Bugfix
• [ ] Feature
• [ ] Performance improvement
• [ ] Feature removal
• [ ] Code style update
• [x] Refactor
• [ ] Docs
• [ ] Build-related changes
• [ ] Other, please describe:

Does this PR introduce a breaking change? (check one)

• [ ] Yes
• [x] No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• [x] It's submitted to the dev branch or to a feature branch, not the main branch
• [x] When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• [x] All tests are passing:
• [ ] New/updated tests are included

Other information: Any other thing we need to know Also remove several needless comments and unused functions ans variables