Duplicate headers and missing closing tags (SEO)

[AvaPL]

trafficstars

Checklist

• [X] I have read and accepted the contributing guidelines.

Is your feature request related to a problem? Please describe

First of all - thank you for creating an maintaining Chirpy! I really love it.

I’ve noticed a few SEO-related issues that might impact page indexing, and I wanted to share them.

Scan of my page resulted in:

• h1 duplicates because the page title is put in h1 tag and it appears on every page in the sidebar - because of that, posts might be treated as duplicates despite having different titles
• similar issue with h2, because "Recently Updated" and "Trending Tags" are h2
• </html>, </head>, </body> closing tags are missing in the page source

Describe the solution you'd like

Headers probably shouldn't be used for common components that appear on every page. They should only be used for the contents of posts.

Closing tags - of course the solution is to add them :)

Describe alternatives you've considered

No response

Additional context

No response

[cotes2020]

...

• h1 duplicates because the page title is put in h1 tag and it appears on every page in the sidebar - because of that, posts might be treated as duplicates despite having different titles
• similar issue with h2, because "Recently Updated" and "Trending Tags" are h2

There is considerable debate online about whether the uniqueness of <H1> tags should be maintained, but so far, there are no authoritative documents confirming that multiple <H1> tags have a negative impact on SEO performance.

I'm open to this, so if you'd like to replace these seemingly redundant <H1> tags, feel free to submit a PR.

...

• </html>, </head>, </body> closing tags are missing in the page source

These tags can be omitted, as the W3C specifications explain in detail.