* Change mailer avatar url

* Use full_asset_url method

* i18n: (zh-CN) Add translations of #6251

* i18n: (zh-CN) Improve translations for #6291

* Fix en.json

* i18n: (zh-CN) Update translations for #6303

* i18n: (zh-CN) Add translations of #6273
with minor adjustment

* Minor fix

* Minor fix

* Restore onboarding modal
Revert 5ba8b3a396895ecec083c5258aaf9084d584a7c4

* Change greeting elephant graphic, fix up some design issues

* Fix wrong link color in onboarding modal

* Use PNG images in HTML e-mails

* Make webpack use URLs with host so fonts load inside HTML e-mails

Convert this back to a relative URL in the premailer CSS loader
since local requests are quicker

* Improve responsive design

* Add missing PNG icon

* Make text e-mails consistent with HTML ones in UserMailer

* Fix UserMailer specs

This may lead to out-of-order notifications, but this is better than not having
notifications at all.

when starting the container.

Currently, Mastodon will retry delivering toots for a bit over 1 hour.
This is a very short timespan when considering private and direct toots, which
cannot be seen by the recipient at all after the delivery attempts have failed.

Ideally, private and direct toots should have a different number of retries,
but I do not know how to do that.

* Replace drawer elephant graphic with a vector image

* Replace wave graphic with SVG

* Remove unused elephant graphic

* Fix regeneration key not getting expired

* Add rake task to remove old regeneration markers

* Remove onboarding modal

* Welcome e-mail

* Send welcome e-mail after confirmation

* Remove obsolete translations

* When must_be_following_dm is on, only notify if recipient dm'ed user
Currently, when must_be_following_dm is on, if a user sends a direct
message replying to any status from the recipient, the recipient gets a
notification. This should not be the case, as if the recipient posted
something publicly this can be used to spam their notifications.

* Refactor replied_to_status_is_direct_message?
Following suggestion in PR

* Fix regeneration marker not being removed after completion

* Return HTTP 206 from /api/v1/timelines/home if regeneration in progress
Prioritize RegenerationWorker by putting it into default queue

* Display loading indicator and poll home timeline while it regenerates

* Add graphic to regeneration message

* Make "not found" indicator consistent with home regeneration

* Translated using Weblate (French)

Currently translated at 100.0% (56 of 56 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/fr/

* Translated using Weblate (Catalan)

Currently translated at 100.0% (56 of 56 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/ca/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (260 of 260 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt_BR/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (45 of 45 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pt_BR/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (529 of 529 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/nl/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (45 of 45 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/nl/

* Translated using Weblate (Galician)

Currently translated at 100.0% (529 of 529 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/gl/

* Translated using Weblate (Galician)

Currently translated at 100.0% (45 of 45 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/gl/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 99.6% (527 of 529 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/pt_BR/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 99.8% (528 of 529 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/pt_BR/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (45 of 45 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pt_BR/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (260 of 260 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/pt_BR/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (56 of 56 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/sk/

* Translated using Weblate (Slovak)

Currently translated at 37.2% (197 of 529 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Slovak)

Currently translated at 100.0% (260 of 260 strings)

Translation: Mastodon/React
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/frontend/sk/

* Translated using Weblate (Russian)

Currently translated at 99.0% (526 of 531 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ru/

* Translated using Weblate (Catalan)

Currently translated at 100.0% (45 of 45 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ca/

* Translated using Weblate (Catalan)

Currently translated at 99.8% (530 of 531 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ca/

* Translated using Weblate (Japanese)

Currently translated at 92.8% (52 of 56 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/ja/

* Translated using Weblate (Japanese)

Currently translated at 75.8% (47 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ja/

* Translated using Weblate (Polish)

Currently translated at 77.4% (48 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pl/

* Translated using Weblate (Slovak)

Currently translated at 38.3% (204 of 532 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/sk/

* Translated using Weblate (Japanese)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ja/

* Translated using Weblate (Catalan)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/ca/

* Translated using Weblate (Polish)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pl/

* Translated using Weblate (Polish)

Currently translated at 100.0% (75 of 75 strings)

Translation: Mastodon/Doorkeeper
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/doorkeeper/pl/

* Translated using Weblate (Polish)

Currently translated at 100.0% (62 of 62 strings)

Translation: Mastodon/Devise
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/devise/pl/

* Translated using Weblate (Polish)

Currently translated at 100.0% (56 of 56 strings)

Translation: Mastodon/Preferences
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/simple_form/pl/

* Translated using Weblate (Russian)

Currently translated at 96.8% (525 of 542 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ru/

* Translated using Weblate (Japanese)

Currently translated at 99.0% (537 of 542 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ja/

* Translated using Weblate (Polish)

Currently translated at 99.8% (541 of 542 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/pl/

* Translated using Weblate (Japanese)

Currently translated at 99.0% (538 of 543 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/ja/

* Translated using Weblate (Dutch)

Currently translated at 97.4% (529 of 543 strings)

Translation: Mastodon/Backend
Translate-URL: https://weblate.joinmastodon.org/projects/mastodon/backend/nl/

* Normalize translations
Ran i18n-tasks normalize && yarn manage:translations

* web share target

* fix

* fix

* i18n: (zh-CN) Update translation for #6252

* e-mail -> email

* i18n: (zh-CN) Update translations for #6256

* i18n: (zh-CN) Minor Improvements

* i18n: (zh-CN) Update translations for #6263

* i18n: (zh-CN) Update translations for #6279

Floating point values are notoriously hard to pin down, so use the
`be_within` matcher to verify the approximate value.

* Translate Korean

* Translate Korean #6263

* Change image URL in mailer to full path

* Add application_mailer.view_profile localization.

* HTML e-mails for NotificationMailer (except digest)

* Add HTML template for digest

* Fix build

see also https://blog.travis-ci.com/2012-08-13-build-workflow-around-pull-requests

- premailer gem to turn CSS into inline styles automatically
- rework UserMailer templates
- reword UserMailer templates

* Fix #1095 - Surround mid-text display names with bdi tags

* Update jest snapshot

CSRF token checking was enabled for API controllers in #6223,
producing "Can't verify CSRF token authenticity" log spam. This
disables logging of failed CSRF checks.

This also changes the protection strategy for
PushSubscriptionsController to use exceptions, making it consistent
with other controllers that use sessions.

* Add aria-autocomplete='list' in Textaria

ref: https://www.w3.org/TR/wai-aria-1.1/#aria-autocomplete

* Make detect empty string brefore assign upload description

* Change code elements in keyboard-shortcuts component to kbd

* Add validation for onMuteNotifications

* Make columns-area unscrollable when modal opend

* Make columns-area unscrollable when modal opened

Related: #6165

* Fix accessibility of column headers

As a screen reader user new to Mastodon, I encountered the following issues with the column headers as designed:
 * Jumping between them was difficult. FOr instance, passing my home timeline to reach notification settings was difficult to impossible, especially considering infinite scrolling.
 * There doesn't appear to be any means for triggering the control via the keyboard. the `titleClick` handler only responds to mouse clicks.
 * I didn't even realize there was a Settings toggle until I made this change.

Thanks for using ARIA in your designs. It's a huge help. But adding a `button` role doesn't add keyboard handling and other button behavior. Also, because the role was on the heading container, it obscured the controls within the container itself. This fix resolve that. It also exposes the headings as headings rather than buttons, enabling skipping columns by using screen readers' heading navigation commands.

Since I myself am blind, if this fix requires additional visual styling, I'd like help applying that so it can be merged. I'd consider it an essential accessibility fix for my and other blind users' existence on the platform. Thanks!

* Styling fixes

* Fixed overflow issue