Fixes #12920

* Add featured tag support to rss feed on public account page

* fix codeing style

It resolves #11338

Fix #11453

* Remove Salmon and PubSubHubbub endpoints

* Add error when trying to follow OStatus accounts

* Fix new accounts not being created in ResolveAccountService

* Third time is the charm?

* Use full asset URL for data-static and data-original

̀image_tag` expands to the full asset URL, we have to do the same in `data` attributes so that it can work when assets and user data are stored on a different host

* Revert "Fix filtering of favourited_by, reblogged_by, followers and following (#10447)"

This reverts commit 120544067f.

* Revert "Hide blocking accounts from blocked users (#10442)"

This reverts commit 62bafa20a1.

* Improve blocked view of profiles

- Change "You are blocked" to "Profile unavailable"
- Hide following/followers in API when blocked
- Disable follow button and show "Profile unavailable" on public profile as well

* create account_identity_proofs table

* add endpoint for keybase to check local proofs

* add async task to update validity and liveness of proofs from keybase

* first pass keybase proof CRUD

* second pass keybase proof creation

* clean up proof list and add badges

* add avatar url to keybase api

* Always highlight the “Identity Proofs” navigation item when interacting with proofs.

* Update translations.

* Add profile URL.

* Reorder proofs.

* Add proofs to bio.

* Update settings/identity_proofs front-end.

* Use `link_to`.

* Only encode query params if they exist.

URLs without params had a trailing `?`.

* Only show live proofs.

* change valid to active in proof list and update liveness before displaying

* minor fixes

* add keybase config at well-known path

* extremely naive feature flagging off the identity proof UI

* fixes for rubocop

* make identity proofs page resilient to potential keybase issues

* normalize i18n

* tweaks for brakeman

* remove two unused translations

* cleanup and add more localizations

* make keybase_contacts an admin setting

* fix ExternalProofService my_domain

* use Addressable::URI in identity proofs

* use active model serializer for keybase proof config

* more cleanup of keybase proof config

* rename proof is_valid and is_live to proof_valid and proof_live

* cleanup

* assorted tweaks for more robust communication with keybase

* Clean up

* Small fixes

* Display verified identity identically to verified links

* Clean up unused CSS

* Add caching for Keybase avatar URLs

* Remove keybase_contacts setting

* Add hashtag filter to profiles

GET /@:username/tagged/:hashtag
GET /api/v1/accounts/:id/statuses?tagged=:hashtag

* Display featured hashtags on public profile

* Use separate model for featured tags

* Update featured hashtag counters on-write

* Limit featured tags to 10

Fixes #873

This is only available if the instance-wide setting isn't set and allows
people to hide their own followers count. This does not hide others' to
them.

* Do not animate account header art if user's GIF autoplay setting is off

Fixes #9472

* Honour currently logged-in user's GIF autoplay setting for account avatars

Fixes #9467

* Fix avatar display on some public pages when data is stored on a different host

* Use ternary operator instead of if/else for avatar/header URL

Hello,
The ATOM feed contains the hub declaration for WebSub, but the RSS
version does not.
RSS/ATOM readers will typically pick whichever version comes first, and
will thus not see the WebSub feature.
I therefore suggest putting the ATOM version first, as it is more
feature-rich than its RSS counterpart is.

Clients not compatible with ATOM would not pick it anyway due to the
different type attribute.

A more complicated alternative would be to declare the WebSub feature in
the RSS version as well, using something like the following code, and
ensuring that clients subscribed to the RSS version would receive PuSH
updates just like those subscribed to the ATOM version.

````xml
<rss version="2.0" xmlns:webfeeds="http://webfeeds.org/rss/1.0"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<atom:link rel="self" type="application/rss+xml"
href="https://diaspodon.fr/users/test.rss"/>
<atom:link rel="hub" href="https://diaspodon.fr/api/push"/>
</channel>
</rss>
```

Fix #8685

* Verify link ownership with rel="me"

* Add explanation about verification to UI

* Perform link verifications

* Add click-to-copy widget for verification HTML

* Redesign edit profile page

* Redesign forms

* Improve responsive design of settings pages

* Restore landing page sign-up form

* Fix typo

* Support <link> tags, add spec

* Fix links not being verified on first discovery and passive updates

Fixes #7380.

On my local instance (https://ruby.social) we have a custom emoji for octocat (:octocat:). I would love to be able to use the emoji in the metadata for my profile. Instead of:

| github | https://github.com/phaedryx

It could be:

| :octocat: | https://github.com/phaedryx

(using a single emoji makes it easier to read the urls)

* Show exact number of followers/statuses on export page/in tooltip

* Fix tests

Upstream's implementation has been merged a while ago and is the preferred
way to set fields, as it is the only one compatible with upstream and is
more user-friendly.

This commit deletes the legacy glitch-soc FrontMatter functionality in order
to clean up the code and make it easier to maintain.

* Add preference to hide following/followers lists

- Public pages
- ActivityPub collections (does not return pages but does give total)
- REST API (unless it's your own) (does not federate)

Fix #6901

* Add preference

* Add delegation

* Fix issue

* Fix issue

* Store actor type in database

* Add bot nameplate to web UI, add setting to preferences, API, AP
Fix #7365

* Fix code style issues

Follow-up to #6124

Fix #7335

glitch-soc-style still in backup, both sharing the same SCSS style

* Add bio fields

- Fix #3211
- Fix #232
- Fix #121

* Display bio fields in web UI

* Fix output of links and missing fields

* Federate bio fields over ActivityPub as PropertyValue

* Improve how the fields are stored, add to Edit profile form

* Add rel=me to links in fields

Fix #121

* Fix follow/unfollow buttons on public profile

- Present non-logged users with web+mastodon:// URLs for remote accounts
- Present logged-in users with appropriate links (authorize_follows and
  remote_unfollows) for remote accounts

* Do not cache rendered cards if user is logged in

Federate custom emojis with accounts

Display summary of attachments in description, and mark up content
warning if present, e.g.:

    Attached: 3 images · Content warning: Dota 2

When text is not supposed to be hidden, it looks more like:

    Attached: 3 images

    Here is the text of the toot

With #6817, multilinguagility should be assured...