fix(blog): only use router animation after initial load

[peterjokumsen]

Summary

Update logic for router animation, when no previous animation applied will not animate.

Changes Made

Expand for additional details

## Screenshots ## Related issues Fixes #149 ## Testing instructions

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[codecov[bot]]

Codecov Report

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

Project coverage is 91.30%. Comparing base (d4bb133) to head (612c351). Report is 1 commits behind head on main.

Additional details and impacted files

| [Files with missing lines](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | Coverage Δ | | |---|---|---| | [apps/blog/src/app/primary.component.ts](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150?src=pr&el=tree&filepath=apps%2Fblog%2Fsrc%2Fapp%2Fprimary.component.ts&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen#diff-YXBwcy9ibG9nL3NyYy9hcHAvcHJpbWFyeS5jb21wb25lbnQudHM=) | `84.21% <100.00%> (+1.85%)` | :arrow_up: | ... and [85 files with indirect coverage changes](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | [Components](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | Coverage Δ | | |---|---|---| | [md-parser](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | `∅ <ø> (∅)` | | | [ts-libs](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | `∅ <ø> (∅)` | | | [md-renderer](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | `∅ <ø> (∅)` | | | [module_ng_libs](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | `∅ <ø> (∅)` | | | [app_blog](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) | `91.30% <100.00%> (+0.25%)` | :arrow_up: | ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen). Last update [d4bb133...612c351](https://app.codecov.io/gh/peterjokumsen/peterjokumsen-nx-workspace/pull/150?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Peter+Jokumsen).

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🦙 MegaLinter status: ⚠️ WARNING

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