Below is a list of all notification types (except for OpenStackManager's; I'll add those later). For each of them, we should figure out what they should look like in the new world where we have no inline links and instead have secondary actions.
welcome title-message: Welcome to Wikipedia, $1! We're glad you're here. edit-user-talk title-message: [[User:$1|$1]] left a message on your [[User talk:$2#$3|talk page]]. flyout-message: $1 left a message on your [[User talk:$2#$3|talk page]]. bundle-message: $1 and $3 others left a message on your [[User talk:$2|talk page]]. email-subject-message: $1 left you a message on Wikipedia email-body-batch-message: $1 left a message on your talk page. email-body-batch-bundle-message: $1 and $2 others left a message on your talk page. reverted title-message: Your edits on [[:$2]] have been reverted by [[User:$1|$1]]. $3 flyout-message: Your edits on $2 have been reverted by $1. $3 email-subject-message: Your edits were reverted on Wikipedia email-body-batch-message: Your edits on $2 have been reverted by $1. page-linked title-message: [[:$2]] was linked from [[:$3]]. [[Special:WhatLinksHere/$2|See all links to this page]]. flyout-message: [[:$2]] was linked from [[:$3]]. bundle-message: $2 was linked from $3 and $4 other pages. [[Special:WhatLinksHere/$2|See all links to this page]] email-subject-message: A page you created was linked on Wikipedia email-body-batch-message: $2 was linked from $3. email-body-batch-bundle-message: $2 was linked from $3 and $4 other pages. mention title-message: [[User:$1|$1]] mentioned you on the $5 talk page in "[[:$3#$2|$4]]". flyout-message: $1 mentioned you on the $5 talk page in "[[:$3#$2|$4]]". email-subject-message: $1 mentioned you on Wikipedia email-body-batch-message: $1 mentioned you on the $4 talk page in "$3". user-rights title-message: Your user rights [[Special:Log/rights/$1|were changed]] by [[User:$1|$1]]. $2. [[Special:ListGroupRights|Learn more]] flyout-message: Your user rights were changed by $1. $2. [[Special:ListGroupRights|Learn more]] email-subject-message: Your user rights have changed on Wikipedia email-body-batch-message: Your user rights were changed by $1. $2. pagetriage-mark-as-reviewed title-message: [[$2]] was reviewed by [[User:$1|$1]] flyout-message: [[$2]] was reviewed by <b>$1</b> email-subject-message: Your page was reviewed on Wikipedia email-body-batch-message: $1 was reviewed by $2. pagetriage-add-maintenance-tag title-message: [[$2]] was reviewed and tagged by [[User:$1|$1]]. Tags: $3 flyout-message: [[$2]] was reviewed and tagged by <b>$1</b>. Tags: $3 email-subject-message: Your page was tagged on Wikipedia email-body-batch-message: $1 was reviewed and tagged by $2. pagetriage-add-deletion-tag title-message: [[$2]] was reviewed and marked for deletion by [[User:$1|$1]]. Tags: $3 flyout-message: [[$2]] was reviewed and marked for deletion by <b>$1</b>. Tags: $3 email-subject-message: Your page was marked for deletion on Wikipedia email-body-batch-message: $1 was marked for deletion by $2. ep-course-talk-notification title-message: The [[$2|course talk page of $3]] was edited by [[User:$1|$1]]. email-subject-message: The course talk page of $2 was edited by $1. email-body-batch-message: The course talk page of $2 was edited by $1. ep-student-add-notification title-message: You have been added to [[$2|$3]] by [[User:$1|$1]]. email-subject-message: You have been added to $2 by $1. email-body-batch-message: You have been added to $2 by $1. ep-instructor-add-notification title-message: You have been added as an instructor to [[$2|$3]] by [[User:$1|$1]]. email-subject-message: You have been added as an instructor to $2 by $1. email-body-batch-message: You have been added as an instructor to $2 by $1. ep-campus-add-notification title-message: You have been added as a campus volunteer to [[$2|$3]] by [[User:$1|$1]]. email-subject-message: You have been added as a campus volunteer to $2 by $1. email-body-batch-message: You have been added as a campus volunteer to $2 by $1. ep-online-add-notification title-message: You have been added as an online volunteer to [[$2|$3]] by [[User:$1|$1]]. email-subject-message: You have been added as an online volunteer to $2 by $1. email-body-batch-message: You have been added as an online volunteer to $2 by $1. edit-thank title-message: [[User:$1|$1]] thanked you for $2 on [[:$3]]. flyout-message: [[User:$1|$1]] thanked you for your edit on $2. email-subject-message: $1 thanked you for your edit on Wikipedia email-body-batch-message: $1 thanked you for your edit on $2. flow-thank title-message: [[User:$1|$1]] thanked you for $2 in "$3" on [[:$4]]. flyout-message: [[User:$1|$1]] thanked you for your comment in "$2" on $3. email-subject-message: $1 thanked you for your comment on Wikipedia email-body-batch-message: $1 thanked you for your comment in "$2" on $3. flow-new-topic title-message: <span class="mw-echo-title-heading plainlinks">[$5 $4]</span><br />$1 created a new topic on '''$3'''. bundle-message: $1 new topics on '''<span class="plainlinks">[$3 $2]</span>''' email-subject-message: $1 created a new topic on $2 email-body-batch-message: $1 created a new topic with the title "$2" on $3 email-body-batch-bundle-message: $1 new topics on $2 flow-post-reply title-message: <span class="plainlinks mw-echo-title-heading">[$5 $2]</span><br />$1 responded on '''$4'''. bundle-message: <span class="plainlinks mw-echo-title-heading">[$4 $2]</span><br />$1 and $5 others responded on '''$3'''. email-subject-message: $2 on $3 email-body-batch-message: $1 responded to "$2" on $3 email-body-batch-bundle-message: $1 and $4 others responded to "$2" on $3 flow-post-edited title-message: <span class="plainlinks mw-echo-title-heading">[$6 $2]</span><br />$1 has edited your <span class="plainlinks">[$5 post]</span> on [[$3|$4]]. bundle-message: $1 and $5 others edited a <span class="plainlinks">[$4 post]</span> in "$2" on "$3". email-subject-message: $1 edited a post email-body-batch-message: $1 edited a post in "$2" on $3 email-body-batch-bundle-message: $1 and $4 others edited a post in "$2" on $3 flow-topic-renamed title-message: $1 changed the title of <span class="plainlinks">[$2 $3]</span> to "$4" on [[$5|$6]]. email-subject-message: $1 renamed your topic email-body-batch-message: $1 renamed your topic "$2" to "$3" on $4 flow-mention title-message: $1 mentioned you in their <span class="plainlinks">[$2 post]</span> in "$3" on "$4". email-subject-message: $1 mentioned you on $2 email-body-batch-message: $1 mentioned you in their post in "$2" on $3 flow-enabled-on-talkpage title-message: New discussion system enabled for your user talk page<br /><small>Available at [[$1]]</small> email-subject-message: New discussion system on $1 email-body-batch-message: Flow, the new wiki discussion system, has been enabled on your user talk page on Wikipedia. You can get more information, provide feedback or disable the new system any time from the Beta features section in your preferences. gather-hide title-message: [[$1|Your collection]] was hidden. This means that you are the only one who can see it. Collections are hidden if they go against our [[Project:Gather/Moderation_Criteria|moderation criteria]]. You can [[Project:Gather/User_Feedback|contest this]]. email-subject-message: Your collection $1 was hidden. email-body-batch-message: <gather-moderation-hidden-email-batch-body> gather-unhide title-message: [[$1|Your collection]] was unhidden. This means that it can be viewed publicly again. email-subject-message: Your collection $1 was unhidden. email-body-batch-message: <gather-moderation-unhidden-email-batch-body> gather-approve title-message: [[$1|Your collection]] was approved. This means that it won't be automatically hidden again. email-subject-message: Your collection $1 was approved. email-body-batch-message: <gather-moderation-approved-email-batch-body> unsubscribe-bouncehandler title-message: Your registered email address is no longer valid. flyout-message: Your registered email address $1 has been unsubscribed due to multiple message delivery failures. You can [[Special:ConfirmEmail|verify your email address again]]. cx-first-translation title-message: Congratulations for your first translation! Find more pages to translate at [[Special:MyContributions|your contributions page]]. email-subject-message: Congratulations for your first translation cx-tenth-translation title-message: Congratulations for your tenth translation! You are becoming an expert translator. Keep up the good work! email-subject-message: Congratulations for your tenth translation cx-hundredth-translation title-message: You just made 100 translations! That is a remarkable achievement. Share the word to other editors. email-subject-message: Congratulations for your one hundredth translation