diff --git a/app/javascript/mastodon/components/media_gallery.jsx b/app/javascript/mastodon/components/media_gallery.jsx
index 1044b729b..e3c0065c9 100644
--- a/app/javascript/mastodon/components/media_gallery.jsx
+++ b/app/javascript/mastodon/components/media_gallery.jsx
@@ -321,7 +321,10 @@ class MediaGallery extends PureComponent {
     if (uncached) {
       spoilerButton = (
         <button type='button' disabled className='spoiler-button__overlay'>
-          <span className='spoiler-button__overlay__label'><FormattedMessage id='status.uncached_media_warning' defaultMessage='Not available' /></span>
+          <span className='spoiler-button__overlay__label'>
+            <FormattedMessage id='status.uncached_media_warning' defaultMessage='Preview not available' />
+            <span className='spoiler-button__overlay__action'><FormattedMessage id='status.media.open' defaultMessage='Click to open' /></span>
+          </span>
         </button>
       );
     } else if (visible) {
@@ -329,7 +332,10 @@ class MediaGallery extends PureComponent {
     } else {
       spoilerButton = (
         <button type='button' onClick={this.handleOpen} className='spoiler-button__overlay'>
-          <span className='spoiler-button__overlay__label'>{sensitive ? <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' /> : <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />}</span>
+          <span className='spoiler-button__overlay__label'>
+            {sensitive ? <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' /> : <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />}
+            <span className='spoiler-button__overlay__action'><FormattedMessage id='status.media.show' defaultMessage='Click to show' /></span>
+          </span>
         </button>
       );
     }
diff --git a/app/javascript/mastodon/locales/en.json b/app/javascript/mastodon/locales/en.json
index 8705e6cd6..edecaf60f 100644
--- a/app/javascript/mastodon/locales/en.json
+++ b/app/javascript/mastodon/locales/en.json
@@ -618,6 +618,8 @@
   "status.history.created": "{name} created {date}",
   "status.history.edited": "{name} edited {date}",
   "status.load_more": "Load more",
+  "status.media.open": "Click to open",
+  "status.media.show": "Click to show",
   "status.media_hidden": "Media hidden",
   "status.mention": "Mention @{name}",
   "status.more": "More",
@@ -648,7 +650,7 @@
   "status.title.with_attachments": "{user} posted {attachmentCount, plural, one {an attachment} other {{attachmentCount} attachments}}",
   "status.translate": "Translate",
   "status.translated_from_with": "Translated from {lang} using {provider}",
-  "status.uncached_media_warning": "Not available",
+  "status.uncached_media_warning": "Preview not available",
   "status.unmute_conversation": "Unmute conversation",
   "status.unpin": "Unpin from profile",
   "subscribed_languages.lead": "Only posts in selected languages will appear on your home and list timelines after the change. Select none to receive posts in all languages.",
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 959dc2f71..e1af246a8 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -4213,34 +4213,31 @@ a.status-card.compact:hover {
   }
 
   &__overlay {
-    display: block;
-    background: transparent;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    background: rgba($black, 0.5);
     width: 100%;
     height: 100%;
+    padding: 0;
+    margin: 0;
     border: 0;
+    border-radius: 4px;
 
     &__label {
-      display: inline-block;
-      background: rgba($base-overlay-background, 0.5);
-      border-radius: 8px;
-      padding: 8px 12px;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      gap: 8px;
+      flex-direction: column;
       color: $primary-text-color;
       font-weight: 500;
       font-size: 14px;
     }
 
-    &:hover,
-    &:focus,
-    &:active {
-      .spoiler-button__overlay__label {
-        background: rgba($base-overlay-background, 0.8);
-      }
-    }
-
-    &:disabled {
-      .spoiler-button__overlay__label {
-        background: rgba($base-overlay-background, 0.5);
-      }
+    &__action {
+      font-weight: 400;
+      font-size: 13px;
     }
   }
 }
diff --git a/app/mailers/admin_mailer.rb b/app/mailers/admin_mailer.rb
index bc6d87ae6..5baf9b38a 100644
--- a/app/mailers/admin_mailer.rb
+++ b/app/mailers/admin_mailer.rb
@@ -6,45 +6,52 @@ class AdminMailer < ApplicationMailer
   helper :accounts
   helper :languages
 
-  def new_report(recipient, report)
-    @report   = report
-    @me       = recipient
-    @instance = Rails.configuration.x.local_domain
+  before_action :process_params
+  before_action :set_instance
+
+  default to: -> { @me.user_email }
+
+  def new_report(report)
+    @report = report
 
     locale_for_account(@me) do
-      mail to: @me.user_email, subject: I18n.t('admin_mailer.new_report.subject', instance: @instance, id: @report.id)
+      mail subject: default_i18n_subject(instance: @instance, id: @report.id)
     end
   end
 
-  def new_appeal(recipient, appeal)
-    @appeal   = appeal
-    @me       = recipient
-    @instance = Rails.configuration.x.local_domain
+  def new_appeal(appeal)
+    @appeal = appeal
 
     locale_for_account(@me) do
-      mail to: @me.user_email, subject: I18n.t('admin_mailer.new_appeal.subject', instance: @instance, username: @appeal.account.username)
+      mail subject: default_i18n_subject(instance: @instance, username: @appeal.account.username)
     end
   end
 
-  def new_pending_account(recipient, user)
-    @account  = user.account
-    @me       = recipient
-    @instance = Rails.configuration.x.local_domain
+  def new_pending_account(user)
+    @account = user.account
 
     locale_for_account(@me) do
-      mail to: @me.user_email, subject: I18n.t('admin_mailer.new_pending_account.subject', instance: @instance, username: @account.username)
+      mail subject: default_i18n_subject(instance: @instance, username: @account.username)
     end
   end
 
-  def new_trends(recipient, links, tags, statuses)
+  def new_trends(links, tags, statuses)
     @links                  = links
     @tags                   = tags
     @statuses               = statuses
-    @me                     = recipient
-    @instance               = Rails.configuration.x.local_domain
 
     locale_for_account(@me) do
-      mail to: @me.user_email, subject: I18n.t('admin_mailer.new_trends.subject', instance: @instance)
+      mail subject: default_i18n_subject(instance: @instance)
     end
   end
+
+  private
+
+  def process_params
+    @me = params[:recipient]
+  end
+
+  def set_instance
+    @instance = Rails.configuration.x.local_domain
+  end
 end
diff --git a/app/models/trends.rb b/app/models/trends.rb
index b09db940e..4db2cddbf 100644
--- a/app/models/trends.rb
+++ b/app/models/trends.rb
@@ -38,7 +38,7 @@ module Trends
       statuses = user.allows_trending_statuses_review_emails? ? statuses_requiring_review : []
       next if links.empty? && tags.empty? && statuses.empty?
 
-      AdminMailer.new_trends(user.account, links, tags, statuses).deliver_later!
+      AdminMailer.with(recipient: user.account).new_trends(links, tags, statuses).deliver_later! if user.allows_trends_review_emails?
     end
   end
 
diff --git a/app/models/trends/links.rb b/app/models/trends/links.rb
index c94f7c023..fcbdb1a5f 100644
--- a/app/models/trends/links.rb
+++ b/app/models/trends/links.rb
@@ -3,6 +3,8 @@
 class Trends::Links < Trends::Base
   PREFIX = 'trending_links'
 
+  BATCH_SIZE = 100
+
   self.default_options = {
     threshold: 5,
     review_threshold: 3,
@@ -67,8 +69,21 @@ class Trends::Links < Trends::Base
   end
 
   def refresh(at_time = Time.now.utc)
-    preview_cards = PreviewCard.where(id: (recently_used_ids(at_time) + PreviewCardTrend.pluck(:preview_card_id)).uniq)
-    calculate_scores(preview_cards, at_time)
+    # First, recalculate scores for links that were trending previously. We split the queries
+    # to avoid having to load all of the IDs into Ruby just to send them back into Postgres
+    PreviewCard.where(id: PreviewCardTrend.select(:preview_card_id)).find_in_batches(batch_size: BATCH_SIZE) do |preview_cards|
+      calculate_scores(preview_cards, at_time)
+    end
+
+    # Then, calculate scores for links that were used today. There are potentially some
+    # duplicate items here that we might process one more time, but that should be fine
+    PreviewCard.where(id: recently_used_ids(at_time)).find_in_batches(batch_size: BATCH_SIZE) do |preview_cards|
+      calculate_scores(preview_cards, at_time)
+    end
+
+    # Now that all trends have up-to-date scores, and all the ones below the threshold have
+    # been removed, we can recalculate their positions
+    PreviewCardTrend.connection.exec_update('UPDATE preview_card_trends SET rank = t0.calculated_rank FROM (SELECT id, row_number() OVER w AS calculated_rank FROM preview_card_trends WINDOW w AS (PARTITION BY language ORDER BY score DESC)) t0 WHERE preview_card_trends.id = t0.id')
   end
 
   def request_review
@@ -139,10 +154,7 @@ class Trends::Links < Trends::Base
     to_insert = items.filter { |(score, _)| score >= options[:decay_threshold] }
     to_delete = items.filter { |(score, _)| score < options[:decay_threshold] }
 
-    PreviewCardTrend.transaction do
-      PreviewCardTrend.upsert_all(to_insert.map { |(score, preview_card)| { preview_card_id: preview_card.id, score: score, language: preview_card.language, allowed: preview_card.trendable? || false } }, unique_by: :preview_card_id) if to_insert.any?
-      PreviewCardTrend.where(preview_card_id: to_delete.map { |(_, preview_card)| preview_card.id }).delete_all if to_delete.any?
-      PreviewCardTrend.connection.exec_update('UPDATE preview_card_trends SET rank = t0.calculated_rank FROM (SELECT id, row_number() OVER w AS calculated_rank FROM preview_card_trends WINDOW w AS (PARTITION BY language ORDER BY score DESC)) t0 WHERE preview_card_trends.id = t0.id')
-    end
+    PreviewCardTrend.upsert_all(to_insert.map { |(score, preview_card)| { preview_card_id: preview_card.id, score: score, language: preview_card.language, allowed: preview_card.trendable? || false } }, unique_by: :preview_card_id) if to_insert.any?
+    PreviewCardTrend.where(preview_card_id: to_delete.map { |(_, preview_card)| preview_card.id }).delete_all if to_delete.any?
   end
 end
diff --git a/app/models/trends/statuses.rb b/app/models/trends/statuses.rb
index d4d5b1c24..52625005e 100644
--- a/app/models/trends/statuses.rb
+++ b/app/models/trends/statuses.rb
@@ -3,6 +3,8 @@
 class Trends::Statuses < Trends::Base
   PREFIX = 'trending_statuses'
 
+  BATCH_SIZE = 100
+
   self.default_options = {
     threshold: 5,
     review_threshold: 3,
@@ -58,8 +60,21 @@ class Trends::Statuses < Trends::Base
   end
 
   def refresh(at_time = Time.now.utc)
-    statuses = Status.where(id: (recently_used_ids(at_time) + StatusTrend.pluck(:status_id)).uniq).includes(:status_stat, :account)
-    calculate_scores(statuses, at_time)
+    # First, recalculate scores for statuses that were trending previously. We split the queries
+    # to avoid having to load all of the IDs into Ruby just to send them back into Postgres
+    Status.where(id: StatusTrend.select(:status_id)).includes(:status_stat, :account).find_in_batches(batch_size: BATCH_SIZE) do |statuses|
+      calculate_scores(statuses, at_time)
+    end
+
+    # Then, calculate scores for statuses that were used today. There are potentially some
+    # duplicate items here that we might process one more time, but that should be fine
+    Status.where(id: recently_used_ids(at_time)).includes(:status_stat, :account).find_in_batches(batch_size: BATCH_SIZE) do |statuses|
+      calculate_scores(statuses, at_time)
+    end
+
+    # Now that all trends have up-to-date scores, and all the ones below the threshold have
+    # been removed, we can recalculate their positions
+    StatusTrend.connection.exec_update('UPDATE status_trends SET rank = t0.calculated_rank FROM (SELECT id, row_number() OVER w AS calculated_rank FROM status_trends WINDOW w AS (PARTITION BY language ORDER BY score DESC)) t0 WHERE status_trends.id = t0.id')
   end
 
   def request_review
@@ -117,10 +132,7 @@ class Trends::Statuses < Trends::Base
     to_insert = items.filter { |(score, _)| score >= options[:decay_threshold] }
     to_delete = items.filter { |(score, _)| score < options[:decay_threshold] }
 
-    StatusTrend.transaction do
-      StatusTrend.upsert_all(to_insert.map { |(score, status)| { status_id: status.id, account_id: status.account_id, score: score, language: status.language, allowed: status.trendable? || false } }, unique_by: :status_id) if to_insert.any?
-      StatusTrend.where(status_id: to_delete.map { |(_, status)| status.id }).delete_all if to_delete.any?
-      StatusTrend.connection.exec_update('UPDATE status_trends SET rank = t0.calculated_rank FROM (SELECT id, row_number() OVER w AS calculated_rank FROM status_trends WINDOW w AS (PARTITION BY language ORDER BY score DESC)) t0 WHERE status_trends.id = t0.id')
-    end
+    StatusTrend.upsert_all(to_insert.map { |(score, status)| { status_id: status.id, account_id: status.account_id, score: score, language: status.language, allowed: status.trendable? || false } }, unique_by: :status_id) if to_insert.any?
+    StatusTrend.where(status_id: to_delete.map { |(_, status)| status.id }).delete_all if to_delete.any?
   end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index e5ec2447c..674135eea 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -475,7 +475,7 @@ class User < ApplicationRecord
     User.those_who_can(:manage_users).includes(:account).find_each do |u|
       next unless u.allows_pending_account_emails?
 
-      AdminMailer.new_pending_account(u.account, self).deliver_later
+      AdminMailer.with(recipient: u.account).new_pending_account(self).deliver_later
     end
   end
 
diff --git a/app/services/appeal_service.rb b/app/services/appeal_service.rb
index 399a053d6..ef052e354 100644
--- a/app/services/appeal_service.rb
+++ b/app/services/appeal_service.rb
@@ -23,7 +23,7 @@ class AppealService < BaseService
 
   def notify_staff!
     User.those_who_can(:manage_appeals).includes(:account).each do |u|
-      AdminMailer.new_appeal(u.account, @appeal).deliver_later if u.allows_appeal_emails?
+      AdminMailer.with(recipient: u.account).new_appeal(@appeal).deliver_later if u.allows_appeal_emails?
     end
   end
 end
diff --git a/app/services/report_service.rb b/app/services/report_service.rb
index 3444e1dfa..39ebd5cd8 100644
--- a/app/services/report_service.rb
+++ b/app/services/report_service.rb
@@ -40,7 +40,7 @@ class ReportService < BaseService
 
     User.those_who_can(:manage_reports).includes(:account).each do |u|
       LocalNotificationWorker.perform_async(u.account_id, @report.id, 'Report', 'admin.report')
-      AdminMailer.new_report(u.account, @report).deliver_later if u.allows_report_emails?
+      AdminMailer.with(recipient: u.account).new_report(@report).deliver_later if u.allows_report_emails?
     end
   end
 
diff --git a/config/i18n-tasks.yml b/config/i18n-tasks.yml
index fabb10801..e5001833d 100644
--- a/config/i18n-tasks.yml
+++ b/config/i18n-tasks.yml
@@ -71,6 +71,7 @@ ignore_unused:
   - 'statuses.attached.*'
   - 'themes.*'
   - 'move_handler.carry_{mutes,blocks}_over_text'
+  - 'admin_mailer.*.subject'
   - 'notification_mailer.*'
   - 'imports.overwrite_preambles.{following,blocking,muting,domain_blocking,bookmarks}_html'
   - 'imports.preambles.{following,blocking,muting,domain_blocking,bookmarks}_html'
diff --git a/spec/controllers/api/v1/reports_controller_spec.rb b/spec/controllers/api/v1/reports_controller_spec.rb
index 01b7e4a71..f923ff079 100644
--- a/spec/controllers/api/v1/reports_controller_spec.rb
+++ b/spec/controllers/api/v1/reports_controller_spec.rb
@@ -23,8 +23,6 @@ RSpec.describe Api::V1::ReportsController do
     let(:rule_ids) { nil }
 
     before do
-      allow(AdminMailer).to receive(:new_report)
-        .and_return(instance_double(ActionMailer::MessageDelivery, deliver_later: nil))
       post :create, params: { status_ids: [status.id], account_id: target_account.id, comment: 'reasons', category: category, rule_ids: rule_ids, forward: forward }
     end
 
@@ -41,7 +39,7 @@ RSpec.describe Api::V1::ReportsController do
     end
 
     it 'sends e-mails to admins' do
-      expect(AdminMailer).to have_received(:new_report).with(admin.account, Report)
+      expect(ActionMailer::Base.deliveries.first.to).to eq([admin.email])
     end
 
     context 'when a status does not belong to the reported account' do
diff --git a/spec/controllers/disputes/appeals_controller_spec.rb b/spec/controllers/disputes/appeals_controller_spec.rb
index a0f9c7b91..c8444a2a9 100644
--- a/spec/controllers/disputes/appeals_controller_spec.rb
+++ b/spec/controllers/disputes/appeals_controller_spec.rb
@@ -14,13 +14,11 @@ RSpec.describe Disputes::AppealsController do
     let(:strike) { Fabricate(:account_warning, target_account: current_user.account) }
 
     before do
-      allow(AdminMailer).to receive(:new_appeal)
-        .and_return(instance_double(ActionMailer::MessageDelivery, deliver_later: nil))
       post :create, params: { strike_id: strike.id, appeal: { text: 'Foo' } }
     end
 
     it 'notifies staff about new appeal' do
-      expect(AdminMailer).to have_received(:new_appeal).with(admin.account, Appeal.last)
+      expect(ActionMailer::Base.deliveries.first.to).to eq([admin.email])
     end
 
     it 'redirects back to the strike page' do
diff --git a/spec/mailers/admin_mailer_spec.rb b/spec/mailers/admin_mailer_spec.rb
index 8e2eec40f..9123804a4 100644
--- a/spec/mailers/admin_mailer_spec.rb
+++ b/spec/mailers/admin_mailer_spec.rb
@@ -7,7 +7,7 @@ RSpec.describe AdminMailer do
     let(:sender)    { Fabricate(:account, username: 'John') }
     let(:recipient) { Fabricate(:account, username: 'Mike') }
     let(:report)    { Fabricate(:report, account: sender, target_account: recipient) }
-    let(:mail)      { described_class.new_report(recipient, report) }
+    let(:mail)      { described_class.with(recipient: recipient).new_report(report) }
 
     before do
       recipient.user.update(locale: :en)
@@ -27,7 +27,7 @@ RSpec.describe AdminMailer do
   describe '.new_appeal' do
     let(:appeal) { Fabricate(:appeal) }
     let(:recipient) { Fabricate(:account, username: 'Kurt') }
-    let(:mail)      { described_class.new_appeal(recipient, appeal) }
+    let(:mail)      { described_class.with(recipient: recipient).new_appeal(appeal) }
 
     before do
       recipient.user.update(locale: :en)
@@ -47,7 +47,7 @@ RSpec.describe AdminMailer do
   describe '.new_pending_account' do
     let(:recipient) { Fabricate(:account, username: 'Barklums') }
     let(:user) { Fabricate(:user) }
-    let(:mail) { described_class.new_pending_account(recipient, user) }
+    let(:mail) { described_class.with(recipient: recipient).new_pending_account(user) }
 
     before do
       recipient.user.update(locale: :en)
@@ -69,7 +69,7 @@ RSpec.describe AdminMailer do
     let(:links) { [] }
     let(:statuses) { [] }
     let(:tags) { [] }
-    let(:mail) { described_class.new_trends(recipient, links, tags, statuses) }
+    let(:mail) { described_class.with(recipient: recipient).new_trends(links, tags, statuses) }
 
     before do
       recipient.user.update(locale: :en)
diff --git a/spec/mailers/previews/admin_mailer_preview.rb b/spec/mailers/previews/admin_mailer_preview.rb
index 9572768cd..bc8f0193b 100644
--- a/spec/mailers/previews/admin_mailer_preview.rb
+++ b/spec/mailers/previews/admin_mailer_preview.rb
@@ -5,16 +5,16 @@
 class AdminMailerPreview < ActionMailer::Preview
   # Preview this email at http://localhost:3000/rails/mailers/admin_mailer/new_pending_account
   def new_pending_account
-    AdminMailer.new_pending_account(Account.first, User.pending.first)
+    AdminMailer.with(recipient: Account.first).new_pending_account(User.pending.first)
   end
 
   # Preview this email at http://localhost:3000/rails/mailers/admin_mailer/new_trends
   def new_trends
-    AdminMailer.new_trends(Account.first, PreviewCard.joins(:trend).limit(3), Tag.limit(3), Status.joins(:trend).where(reblog_of_id: nil).limit(3))
+    AdminMailer.with(recipient: Account.first).new_trends(PreviewCard.joins(:trend).limit(3), Tag.limit(3), Status.joins(:trend).where(reblog_of_id: nil).limit(3))
   end
 
   # Preview this email at http://localhost:3000/rails/mailers/admin_mailer/new_appeal
   def new_appeal
-    AdminMailer.new_appeal(Account.first, Appeal.first)
+    AdminMailer.with(recipient: Account.first).new_appeal(Appeal.first)
   end
 end
diff --git a/spec/mailers/previews/notification_mailer_preview.rb b/spec/mailers/previews/notification_mailer_preview.rb
index bc41662a1..214161881 100644
--- a/spec/mailers/previews/notification_mailer_preview.rb
+++ b/spec/mailers/previews/notification_mailer_preview.rb
@@ -32,9 +32,4 @@ class NotificationMailerPreview < ActionMailer::Preview
     r = Status.where.not(reblog_of_id: nil).first
     NotificationMailer.reblog(r.reblog.account, Notification.find_by(activity: r))
   end
-
-  # Preview this email at http://localhost:3000/rails/mailers/notification_mailer/digest
-  def digest
-    NotificationMailer.digest(Account.first, since: 90.days.ago)
-  end
 end