Merge commit '811575a10903cada549580979cc809ca98ad570c' into glitch-soc/merge-upstream

2026-03-29 03:00:33 +02:00 · 2026-03-11 18:50:59 +01:00
parent 9602f6fcc3 811575a109
commit b5222606e3
41 changed files with 690 additions and 266 deletions
--- a/FEDERATION.md
+++ b/FEDERATION.md
@@ -13,7 +13,8 @@
 - [FEP-f1d5: NodeInfo in Fediverse Software](https://codeberg.org/fediverse/fep/src/branch/main/fep/f1d5/fep-f1d5.md)
 - [FEP-8fcf: Followers collection synchronization across servers](https://codeberg.org/fediverse/fep/src/branch/main/fep/8fcf/fep-8fcf.md)
 - [FEP-5feb: Search indexing consent for actors](https://codeberg.org/fediverse/fep/src/branch/main/fep/5feb/fep-5feb.md)
- [FEP-044f: Consent-respecting quote posts](https://codeberg.org/fediverse/fep/src/branch/main/fep/044f/fep-044f.md): partial support for incoming quote-posts
+- [FEP-044f: Consent-respecting quote posts](https://codeberg.org/fediverse/fep/src/branch/main/fep/044f/fep-044f.md)
+- [FEP-3b86: Activity Intents](https://codeberg.org/fediverse/fep/src/branch/main/fep/3b86/fep-3b86.md): offer handlers for `Object` and `Create` (with support for the `content` parameter only), has support for the `Follow`, `Announce`, `Like` and `Object` intents

 ## ActivityPub in Mastodon

@@ -68,3 +69,5 @@ The following table summarizes those limits.
 | Account aliases (actor `alsoKnownAs`)                         | 256        | List will be truncated             |
 | Custom emoji shortcode (`Emoji` `name`)                       | 2048       | Emoji will be rejected             |
 | Media and avatar/header descriptions (`name`/`summary`)       | 1500       | Description will be truncated      |
+| Collection name (`FeaturedCollection` `name`)                 | 256        | Name will be truncated             |
+| Collection description (`FeaturedCollection` `summary`)       | 2048       | Description will be truncated      |
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,7 +99,7 @@ GEM
    ast (2.4.3)
    attr_required (1.0.2)
    aws-eventstream (1.4.0)
-    aws-partitions (1.1222.0)
+    aws-partitions (1.1223.0)
    aws-sdk-core (3.243.0)
      aws-eventstream (~> 1, >= 1.3.0)
      aws-partitions (~> 1, >= 1.992.0)
@@ -157,7 +157,7 @@ GEM
    case_transform (0.2)
      activesupport
    cbor (0.5.10.1)
-    cgi (0.4.2)
+    cgi (0.5.1)
    charlock_holmes (0.7.9)
    chewy (7.6.0)
      activesupport (>= 5.2)
@@ -209,7 +209,7 @@ GEM
      activerecord (>= 4.2, < 9.0)
    docile (1.4.1)
    domain_name (0.6.20240107)
-    doorkeeper (5.8.2)
+    doorkeeper (5.9.0)
      railties (>= 5)
    dotenv (3.2.0)
    drb (2.2.3)
@@ -230,7 +230,7 @@ GEM
    erubi (1.13.1)
    et-orbi (1.4.0)
      tzinfo
-    excon (1.3.2)
+    excon (1.4.0)
      logger
    fabrication (3.0.0)
    faker (3.6.1)
@@ -246,7 +246,7 @@ GEM
    faraday-net_http (3.4.2)
      net-http (~> 0.5)
    fast_blank (1.0.1)
-    fastimage (2.4.0)
+    fastimage (2.4.1)
    ffi (1.17.3)
    ffi-compiler (1.3.2)
      ffi (>= 1.15.5)
@@ -276,9 +276,9 @@ GEM
      raabro (~> 1.4)
    globalid (1.3.0)
      activesupport (>= 6.1)
-    google-protobuf (4.33.5)
+    google-protobuf (4.34.0)
      bigdecimal
-      rake (>= 13)
+      rake (~> 13.3)
    googleapis-common-protos-types (1.22.0)
      google-protobuf (~> 4.26)
    haml (7.2.0)
@@ -352,7 +352,7 @@ GEM
      azure-blob (~> 0.5.2)
      hashie (~> 5.0)
    jmespath (1.6.2)
-    json (2.18.1)
+    json (2.19.1)
    json-canonicalization (1.0.0)
    json-jwt (1.17.0)
      activesupport (>= 4.2)
@@ -446,7 +446,7 @@ GEM
    mime-types (3.7.0)
      logger
      mime-types-data (~> 3.2025, >= 3.2025.0507)
-    mime-types-data (3.2026.0224)
+    mime-types-data (3.2026.0303)
    mini_mime (1.1.5)
    mini_portile2 (2.8.9)
    minitest (6.0.2)
@@ -507,7 +507,7 @@ GEM
      tzinfo
      validate_url
      webfinger (~> 2.0)
-    openssl (3.3.2)
+    openssl (4.0.1)
    openssl-signature_algorithm (1.3.0)
      openssl (> 2.0)
    opentelemetry-api (1.7.0)
@@ -738,17 +738,17 @@ GEM
      rspec-support (~> 3.13.0)
    rspec-github (3.0.0)
      rspec-core (~> 3.0)
-    rspec-mocks (3.13.7)
+    rspec-mocks (3.13.8)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.13.0)
-    rspec-rails (8.0.3)
+    rspec-rails (8.0.4)
      actionpack (>= 7.2)
      activesupport (>= 7.2)
      railties (>= 7.2)
-      rspec-core (~> 3.13)
-      rspec-expectations (~> 3.13)
-      rspec-mocks (~> 3.13)
-      rspec-support (~> 3.13)
+      rspec-core (>= 3.13.0, < 5.0.0)
+      rspec-expectations (>= 3.13.0, < 5.0.0)
+      rspec-mocks (>= 3.13.0, < 5.0.0)
+      rspec-support (>= 3.13.0, < 5.0.0)
    rspec-sidekiq (5.3.0)
      rspec-core (~> 3.0)
      rspec-expectations (~> 3.0)
@@ -766,7 +766,7 @@ GEM
      rubocop-ast (>= 1.49.0, < 2.0)
      ruby-progressbar (~> 1.7)
      unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.49.0)
+    rubocop-ast (1.49.1)
      parser (>= 3.3.7.2)
      prism (~> 1.7)
    rubocop-capybara (2.22.1)
@@ -792,7 +792,7 @@ GEM
      lint_roller (~> 1.1)
      rubocop (~> 1.72, >= 1.72.1)
      rubocop-rspec (~> 3.5)
-    ruby-prof (2.0.2)
+    ruby-prof (2.0.4)
      base64
      ostruct
    ruby-progressbar (1.13.0)
@@ -847,7 +847,7 @@ GEM
    stackprof (0.2.28)
    starry (0.2.0)
      base64
-    stoplight (5.7.0)
+    stoplight (5.8.0)
      concurrent-ruby
      zeitwerk
    stringio (3.2.0)
@@ -867,7 +867,7 @@ GEM
    test-prof (1.5.2)
    thor (1.5.0)
    tilt (2.7.0)
-    timeout (0.6.0)
+    timeout (0.6.1)
    tpm-key_attestation (0.14.1)
      bindata (~> 2.4)
      openssl (> 2.0)
@@ -1100,4 +1100,4 @@ RUBY VERSION
  ruby 3.4.8

 BUNDLED WITH
-  4.0.7
+  4.0.8
--- a/app/javascript/entrypoints/remote_interaction_helper.ts
+++ b/app/javascript/entrypoints/remote_interaction_helper.ts
@@ -39,26 +39,27 @@ const findLink = (rel: string, data: unknown): JRDLink | undefined => {
  }
 };

-const intentParams = (intent: string) => {
+const intentParams = (intent: string): [string, string] | null => {
  switch (intent) {
    case 'follow':
-      return ['https://w3id.org/fep/3b86/Follow', 'object'] as [string, string];
+      return ['https://w3id.org/fep/3b86/Follow', 'object'];
    case 'reblog':
-      return ['https://w3id.org/fep/3b86/Announce', 'object'] as [
-        string,
-        string,
-      ];
+      return ['https://w3id.org/fep/3b86/Announce', 'object'];
    case 'favourite':
-      return ['https://w3id.org/fep/3b86/Like', 'object'] as [string, string];
+      return ['https://w3id.org/fep/3b86/Like', 'object'];
    case 'vote':
    case 'reply':
-      return ['https://w3id.org/fep/3b86/Object', 'object'] as [string, string];
+      return ['https://w3id.org/fep/3b86/Object', 'object'];
    default:
      return null;
  }
 };

-const findTemplateLink = (data: unknown, intent: string) => {
+const findTemplateLink = (
+  data: unknown,
+  intent: string,
+): [string, string] | [null, null] => {
+  // Find the FEP-3b86 handler for the specific intent
  const [needle, param] = intentParams(intent) ?? [
    'http://ostatus.org/schema/1.0/subscribe',
    'uri',
@@ -66,14 +67,21 @@ const findTemplateLink = (data: unknown, intent: string) => {

  const match = findLink(needle, data);

-  if (match) {
-    return [match.template, param] as [string, string];
+  if (match?.template) {
+    return [match.template, param];
  }

-  const fallback = findLink('http://ostatus.org/schema/1.0/subscribe', data);
+  // If the specific intent wasn't found, try the FEP-3b86 handler for the `Object` intent
+  let fallback = findLink('https://w3id.org/fep/3b86/Object', data);
+  if (fallback?.template) {
+    return [fallback.template, 'object'];
+  }

-  if (fallback) {
-    return [fallback.template, 'uri'] as [string, string];
+  // If it's still not found, try the legacy OStatus subscribe handler
+  fallback = findLink('http://ostatus.org/schema/1.0/subscribe', data);
+
+  if (fallback?.template) {
+    return [fallback.template, 'uri'];
  }

  return [null, null];
--- a/app/javascript/mastodon/components/hover_card_controller.tsx
+++ b/app/javascript/mastodon/components/hover_card_controller.tsx
@@ -14,6 +14,10 @@ import { useTimeout } from 'mastodon/hooks/useTimeout';
 const offset = [-12, 4] as OffsetValue;
 const enterDelay = 750;
 const leaveDelay = 150;
+// Only open the card if the mouse was moved within this time,
+// to avoid triggering the card without intentional mouse movement
+// (e.g. when content changed underneath the mouse cursor)
+const activeMovementThreshold = 150;
 const popperConfig = { strategy: 'fixed' } as UsePopperOptions;

 const isHoverCardAnchor = (element: HTMLElement) =>
@@ -23,10 +27,10 @@ export const HoverCardController: React.FC = () => {
  const [open, setOpen] = useState(false);
  const [accountId, setAccountId] = useState<string | undefined>();
  const [anchor, setAnchor] = useState<HTMLElement | null>(null);
-  const isUsingTouchRef = useRef(false);
  const cardRef = useRef<HTMLDivElement | null>(null);
  const [setLeaveTimeout, cancelLeaveTimeout] = useTimeout();
  const [setEnterTimeout, cancelEnterTimeout, delayEnterTimeout] = useTimeout();
+  const [setMoveTimeout, cancelMoveTimeout] = useTimeout();
  const [setScrollTimeout] = useTimeout();

  const handleClose = useCallback(() => {
@@ -45,6 +49,8 @@ export const HoverCardController: React.FC = () => {

  useEffect(() => {
    let isScrolling = false;
+    let isUsingTouch = false;
+    let isActiveMouseMovement = false;
    let currentAnchor: HTMLElement | null = null;
    let currentTitle: string | null = null;

@@ -66,7 +72,7 @@ export const HoverCardController: React.FC = () => {
    const handleTouchStart = () => {
      // Keeping track of touch events to prevent the
      // hover card from being displayed on touch devices
-      isUsingTouchRef.current = true;
+      isUsingTouch = true;
    };

    const handleMouseEnter = (e: MouseEvent) => {
@@ -78,13 +84,14 @@ export const HoverCardController: React.FC = () => {
        return;
      }

-      // Bail out if a touch is active
-      if (isUsingTouchRef.current) {
+      // Bail out if we're scrolling, a touch is active,
+      // or if there was no active mouse movement
+      if (isScrolling || !isActiveMouseMovement || isUsingTouch) {
        return;
      }

      // We've entered an anchor
-      if (!isScrolling && isHoverCardAnchor(target)) {
+      if (isHoverCardAnchor(target)) {
        cancelLeaveTimeout();

        currentAnchor?.removeAttribute('aria-describedby');
@@ -99,10 +106,7 @@ export const HoverCardController: React.FC = () => {
      }

      // We've entered the hover card
-      if (
-        !isScrolling &&
-        (target === currentAnchor || target === cardRef.current)
-      ) {
+      if (target === currentAnchor || target === cardRef.current) {
        cancelLeaveTimeout();
      }
    };
@@ -141,10 +145,17 @@ export const HoverCardController: React.FC = () => {
    };

    const handleMouseMove = () => {
-      if (isUsingTouchRef.current) {
-        isUsingTouchRef.current = false;
+      if (isUsingTouch) {
+        isUsingTouch = false;
      }
+
      delayEnterTimeout(enterDelay);
+
+      cancelMoveTimeout();
+      isActiveMouseMovement = true;
+      setMoveTimeout(() => {
+        isActiveMouseMovement = false;
+      }, activeMovementThreshold);
    };

    document.body.addEventListener('touchstart', handleTouchStart, {
@@ -188,6 +199,8 @@ export const HoverCardController: React.FC = () => {
    setOpen,
    setAccountId,
    setAnchor,
+    setMoveTimeout,
+    cancelMoveTimeout,
  ]);

  return (
--- a/app/javascript/mastodon/features/account_edit/index.tsx
+++ b/app/javascript/mastodon/features/account_edit/index.tsx
@@ -205,24 +205,21 @@ export const AccountEdit: FC = () => {
          showDescription={!hasFields}
          buttons={
            <>
-              {profile.fields.length > 1 && (
-                <Button
-                  className={classes.editButton}
-                  onClick={handleCustomFieldReorder}
-                >
-                  <FormattedMessage
-                    id='account_edit.custom_fields.reorder_button'
-                    defaultMessage='Reorder fields'
-                  />
-                </Button>
-              )}
-              {hasFields && (
-                <EditButton
-                  item={messages.customFieldsName}
-                  onClick={handleCustomFieldAdd}
-                  disabled={profile.fields.length >= maxFieldCount}
+              <Button
+                className={classes.editButton}
+                onClick={handleCustomFieldReorder}
+                disabled={profile.fields.length <= 1}
+              >
+                <FormattedMessage
+                  id='account_edit.custom_fields.reorder_button'
+                  defaultMessage='Reorder fields'
                />
-              )}
+              </Button>
+              <EditButton
+                item={messages.customFieldsName}
+                onClick={handleCustomFieldAdd}
+                disabled={profile.fields.length >= maxFieldCount}
+              />
            </>
          }
        >
--- a/app/javascript/mastodon/features/account_edit/modals/fields_modals.tsx
+++ b/app/javascript/mastodon/features/account_edit/modals/fields_modals.tsx
@@ -18,6 +18,7 @@ import {
  useAppDispatch,
  useAppSelector,
 } from '@/mastodon/store';
+import { isUrlWithoutProtocol } from '@/mastodon/utils/checks';

 import { ConfirmationModal } from '../../ui/components/confirmation_modals';
 import type { DialogModalProps } from '../../ui/components/dialog_modal';
@@ -48,7 +49,7 @@ const messages = defineMessages({
  },
  editValueHint: {
    id: 'account_edit.field_edit_modal.value_hint',
-    defaultMessage: 'E.g. “example.me”',
+    defaultMessage: 'E.g. “https://example.me”',
  },
  limitHeader: {
    id: 'account_edit.field_edit_modal.limit_header',
@@ -109,6 +110,10 @@ export const EditFieldModal: FC<DialogModalProps & { fieldKey?: string }> = ({
    );
    return hasLink && hasEmoji;
  }, [customEmojiCodes, newLabel, newValue]);
+  const hasLinkWithoutProtocol = useMemo(
+    () => isUrlWithoutProtocol(newValue),
+    [newValue],
+  );

  const dispatch = useAppDispatch();
  const handleSave = useCallback(() => {
@@ -175,6 +180,19 @@ export const EditFieldModal: FC<DialogModalProps & { fieldKey?: string }> = ({
          />
        </Callout>
      )}
+
+      {hasLinkWithoutProtocol && (
+        <Callout variant='warning'>
+          <FormattedMessage
+            id='account_edit.field_edit_modal.url_warning'
+            defaultMessage='To add a link, please include {protocol} at the beginning.'
+            description='{protocol} is https://'
+            values={{
+              protocol: <code>https://</code>,
+            }}
+          />
+        </Callout>
+      )}
    </ConfirmationModal>
  );
 };
--- a/app/javascript/mastodon/features/account_edit/modals/fields_reorder_modal.tsx
+++ b/app/javascript/mastodon/features/account_edit/modals/fields_reorder_modal.tsx
@@ -212,11 +212,9 @@ export const ReorderFieldsModal: FC<DialogModalProps> = ({ onClose }) => {
        return;
      }
      newFields.push({ name: field.name, value: field.value });
-
-      void dispatch(patchProfile({ fields_attributes: newFields })).then(
-        onClose,
-      );
    }
+
+    void dispatch(patchProfile({ fields_attributes: newFields })).then(onClose);
  }, [dispatch, fieldKeys, fields, onClose]);

  const emojis = useAppSelector((state) => state.custom_emojis);
--- a/app/javascript/mastodon/features/collections/detail/index.tsx
+++ b/app/javascript/mastodon/features/collections/detail/index.tsx
@@ -3,7 +3,7 @@ import { useCallback, useEffect } from 'react';
 import { defineMessages, FormattedMessage, useIntl } from 'react-intl';

 import { Helmet } from 'react-helmet';
-import { useLocation, useParams } from 'react-router';
+import { useHistory, useLocation, useParams } from 'react-router';

 import { openModal } from '@/mastodon/actions/modal';
 import ListAltIcon from '@/material-icons/400-24px/list_alt.svg?react';
@@ -84,6 +84,7 @@ const CollectionHeader: React.FC<{ collection: ApiCollectionJSON }> = ({
  const intl = useIntl();
  const { name, description, tag, account_id } = collection;
  const dispatch = useAppDispatch();
+  const history = useHistory();

  const handleShare = useCallback(() => {
    dispatch(
@@ -97,12 +98,14 @@ const CollectionHeader: React.FC<{ collection: ApiCollectionJSON }> = ({
  }, [collection, dispatch]);

  const location = useLocation<{ newCollection?: boolean } | undefined>();
-  const wasJustCreated = location.state?.newCollection;
+  const isNewCollection = location.state?.newCollection;
  useEffect(() => {
-    if (wasJustCreated) {
+    if (isNewCollection) {
+      // Replace with current pathname to clear `newCollection` state
+      history.replace(location.pathname);
      handleShare();
    }
-  }, [handleShare, wasJustCreated]);
+  }, [history, handleShare, isNewCollection, location.pathname]);

  return (
    <div className={classes.header}>
--- a/app/javascript/mastodon/features/collections/detail/share_modal.tsx
+++ b/app/javascript/mastodon/features/collections/detail/share_modal.tsx
@@ -64,7 +64,7 @@ export const CollectionShareModal: React.FC<{
    onClose();
    dispatch(changeCompose(shareMessage));
    dispatch(focusCompose());
-  }, [collectionLink, dispatch, intl, isOwnCollection, onClose]);
+  }, [onClose, collectionLink, dispatch, intl, isOwnCollection]);

  return (
    <ModalShell>
--- a/app/javascript/mastodon/features/collections/editor/accounts.tsx
+++ b/app/javascript/mastodon/features/collections/editor/accounts.tsx
@@ -2,7 +2,7 @@ import { useCallback, useId, useMemo, useState } from 'react';

 import { FormattedMessage, useIntl } from 'react-intl';

-import { useHistory, useLocation } from 'react-router-dom';
+import { useHistory } from 'react-router-dom';

 import CancelIcon from '@/material-icons/400-24px/cancel.svg?react';
 import CheckIcon from '@/material-icons/400-24px/check.svg?react';
@@ -30,12 +30,12 @@ import { useAccount } from 'mastodon/hooks/useAccount';
 import { me } from 'mastodon/initial_state';
 import {
  addCollectionItem,
+  getCollectionItemIds,
  removeCollectionItem,
+  updateCollectionEditorField,
 } from 'mastodon/reducers/slices/collections';
 import { store, useAppDispatch, useAppSelector } from 'mastodon/store';

-import type { TempCollectionState } from './state';
-import { getCollectionEditorState } from './state';
 import classes from './styles.module.scss';
 import { WizardStepHeader } from './wizard_step_header';

@@ -52,9 +52,8 @@ function isOlderThanAWeek(date?: string): boolean {

 const AddedAccountItem: React.FC<{
  accountId: string;
-  isRemovable: boolean;
  onRemove: (id: string) => void;
-}> = ({ accountId, isRemovable, onRemove }) => {
+}> = ({ accountId, onRemove }) => {
  const intl = useIntl();
  const account = useAccount(accountId);

@@ -86,17 +85,15 @@ const AddedAccountItem: React.FC<{
      id={accountId}
      extraAccountInfo={lastPostHint}
    >
-      {isRemovable && (
-        <IconButton
-          title={intl.formatMessage({
-            id: 'collections.remove_account',
-            defaultMessage: 'Remove this account',
-          })}
-          icon='remove'
-          iconComponent={CancelIcon}
-          onClick={handleRemoveAccount}
-        />
-      )}
+      <IconButton
+        title={intl.formatMessage({
+          id: 'collections.remove_account',
+          defaultMessage: 'Remove this account',
+        })}
+        icon='remove'
+        iconComponent={CancelIcon}
+        onClick={handleRemoveAccount}
+      />
    </Account>
  );
 };
@@ -139,28 +136,25 @@ export const CollectionAccounts: React.FC<{
  const intl = useIntl();
  const dispatch = useAppDispatch();
  const history = useHistory();
-  const location = useLocation<TempCollectionState>();
-  const { id, initialItemIds } = getCollectionEditorState(
-    collection,
-    location.state,
-  );
-  const isEditMode = !!id;
-  const collectionItems = collection?.items;

-  const [searchValue, setSearchValue] = useState('');
-  // This state is only used when creating a new collection.
-  // In edit mode, the collection will be updated instantly
-  const [addedAccountIds, setAccountIds] = useState(initialItemIds);
+  const { id, items } = collection ?? {};
+  const isEditMode = !!id;
+  const collectionItems = items;
+
+  const addedAccountIds = useAppSelector(
+    (state) => state.collections.editor.accountIds,
+  );
+
+  // In edit mode, we're bypassing state and just return collection items directly,
+  // since they're edited "live", saving after each addition/deletion
  const accountIds = useMemo(
    () =>
-      isEditMode
-        ? (collectionItems
-            ?.map((item) => item.account_id)
-            .filter((id): id is string => !!id) ?? [])
-        : addedAccountIds,
+      isEditMode ? getCollectionItemIds(collectionItems) : addedAccountIds,
    [isEditMode, collectionItems, addedAccountIds],
  );

+  const [searchValue, setSearchValue] = useState('');
+
  const hasMaxAccounts = accountIds.length === MAX_ACCOUNT_COUNT;

  const {
@@ -233,28 +227,41 @@ export const CollectionAccounts: React.FC<{
    [dispatch, relationships],
  );

-  const removeAccountItem = useCallback((accountId: string) => {
-    setAccountIds((ids) => ids.filter((id) => id !== accountId));
-  }, []);
+  const removeAccountItem = useCallback(
+    (accountId: string) => {
+      dispatch(
+        updateCollectionEditorField({
+          field: 'accountIds',
+          value: accountIds.filter((id) => id !== accountId),
+        }),
+      );
+    },
+    [accountIds, dispatch],
+  );

  const addAccountItem = useCallback(
    (accountId: string) => {
      confirmFollowStatus(accountId, () => {
-        setAccountIds((ids) => [...ids, accountId]);
+        dispatch(
+          updateCollectionEditorField({
+            field: 'accountIds',
+            value: [...accountIds, accountId],
+          }),
+        );
      });
    },
-    [confirmFollowStatus],
+    [accountIds, confirmFollowStatus, dispatch],
  );

  const toggleAccountItem = useCallback(
    (item: SuggestionItem) => {
-      if (addedAccountIds.includes(item.id)) {
+      if (accountIds.includes(item.id)) {
        removeAccountItem(item.id);
      } else {
        addAccountItem(item.id);
      }
    },
-    [addAccountItem, addedAccountIds, removeAccountItem],
+    [accountIds, addAccountItem, removeAccountItem],
  );

  const instantRemoveAccountItem = useCallback(
@@ -406,7 +413,6 @@ export const CollectionAccounts: React.FC<{
              >
                <AddedAccountItem
                  accountId={accountId}
-                  isRemovable={!isEditMode}
                  onRemove={handleRemoveAccountItem}
                />
              </Article>
--- a/app/javascript/mastodon/features/collections/editor/details.tsx
+++ b/app/javascript/mastodon/features/collections/editor/details.tsx
@@ -1,13 +1,13 @@
-import { useCallback, useState } from 'react';
+import { useCallback } from 'react';

 import { FormattedMessage } from 'react-intl';

-import { useHistory, useLocation } from 'react-router-dom';
+import { useHistory } from 'react-router-dom';

 import { isFulfilled } from '@reduxjs/toolkit';

+import { inputToHashtag } from '@/mastodon/utils/hashtags';
 import type {
-  ApiCollectionJSON,
  ApiCreateCollectionPayload,
  ApiUpdateCollectionPayload,
 } from 'mastodon/api_types/collections';
@@ -23,70 +23,77 @@ import { TextInputField } from 'mastodon/components/form_fields/text_input_field
 import {
  createCollection,
  updateCollection,
+  updateCollectionEditorField,
 } from 'mastodon/reducers/slices/collections';
-import { useAppDispatch } from 'mastodon/store';
+import { useAppDispatch, useAppSelector } from 'mastodon/store';

-import type { TempCollectionState } from './state';
-import { getCollectionEditorState } from './state';
 import classes from './styles.module.scss';
 import { WizardStepHeader } from './wizard_step_header';

-export const CollectionDetails: React.FC<{
-  collection?: ApiCollectionJSON | null;
-}> = ({ collection }) => {
+export const CollectionDetails: React.FC = () => {
  const dispatch = useAppDispatch();
  const history = useHistory();
-  const location = useLocation<TempCollectionState>();
-
-  const {
-    id,
-    initialName,
-    initialDescription,
-    initialTopic,
-    initialItemIds,
-    initialDiscoverable,
-    initialSensitive,
-  } = getCollectionEditorState(collection, location.state);
-
-  const [name, setName] = useState(initialName);
-  const [description, setDescription] = useState(initialDescription);
-  const [topic, setTopic] = useState(initialTopic);
-  const [discoverable, setDiscoverable] = useState(initialDiscoverable);
-  const [sensitive, setSensitive] = useState(initialSensitive);
+  const { id, name, description, topic, discoverable, sensitive, accountIds } =
+    useAppSelector((state) => state.collections.editor);

  const handleNameChange = useCallback(
    (event: React.ChangeEvent<HTMLInputElement>) => {
-      setName(event.target.value);
+      dispatch(
+        updateCollectionEditorField({
+          field: 'name',
+          value: event.target.value,
+        }),
+      );
    },
-    [],
+    [dispatch],
  );

  const handleDescriptionChange = useCallback(
    (event: React.ChangeEvent<HTMLTextAreaElement>) => {
-      setDescription(event.target.value);
+      dispatch(
+        updateCollectionEditorField({
+          field: 'description',
+          value: event.target.value,
+        }),
+      );
    },
-    [],
+    [dispatch],
  );

  const handleTopicChange = useCallback(
    (event: React.ChangeEvent<HTMLInputElement>) => {
-      setTopic(event.target.value);
+      dispatch(
+        updateCollectionEditorField({
+          field: 'topic',
+          value: inputToHashtag(event.target.value),
+        }),
+      );
    },
-    [],
+    [dispatch],
  );

  const handleDiscoverableChange = useCallback(
    (event: React.ChangeEvent<HTMLInputElement>) => {
-      setDiscoverable(event.target.value === 'public');
+      dispatch(
+        updateCollectionEditorField({
+          field: 'discoverable',
+          value: event.target.value === 'public',
+        }),
+      );
    },
-    [],
+    [dispatch],
  );

  const handleSensitiveChange = useCallback(
    (event: React.ChangeEvent<HTMLInputElement>) => {
-      setSensitive(event.target.checked);
+      dispatch(
+        updateCollectionEditorField({
+          field: 'sensitive',
+          value: event.target.checked,
+        }),
+      );
    },
-    [],
+    [dispatch],
  );

  const handleSubmit = useCallback(
@@ -112,7 +119,7 @@ export const CollectionDetails: React.FC<{
          description,
          discoverable,
          sensitive,
-          account_ids: initialItemIds,
+          account_ids: accountIds,
        };
        if (topic) {
          payload.tag_name = topic;
@@ -124,9 +131,7 @@ export const CollectionDetails: React.FC<{
          }),
        ).then((result) => {
          if (isFulfilled(result)) {
-            history.replace(
-              `/collections/${result.payload.collection.id}/edit/details`,
-            );
+            history.replace(`/collections`);
            history.push(`/collections/${result.payload.collection.id}`, {
              newCollection: true,
            });
@@ -143,7 +148,7 @@ export const CollectionDetails: React.FC<{
      sensitive,
      dispatch,
      history,
-      initialItemIds,
+      accountIds,
    ],
  );

@@ -215,6 +220,9 @@ export const CollectionDetails: React.FC<{
          }
          value={topic}
          onChange={handleTopicChange}
+          autoCapitalize='off'
+          autoCorrect='off'
+          spellCheck='false'
          maxLength={40}
        />

--- a/app/javascript/mastodon/features/collections/editor/index.tsx
+++ b/app/javascript/mastodon/features/collections/editor/index.tsx
@@ -16,7 +16,10 @@ import ListAltIcon from '@/material-icons/400-24px/list_alt.svg?react';
 import { Column } from 'mastodon/components/column';
 import { ColumnHeader } from 'mastodon/components/column_header';
 import { LoadingIndicator } from 'mastodon/components/loading_indicator';
-import { fetchCollection } from 'mastodon/reducers/slices/collections';
+import {
+  collectionEditorActions,
+  fetchCollection,
+} from 'mastodon/reducers/slices/collections';
 import { useAppDispatch, useAppSelector } from 'mastodon/store';

 import { CollectionAccounts } from './accounts';
@@ -68,6 +71,7 @@ export const CollectionEditorPage: React.FC<{
  const collection = useAppSelector((state) =>
    id ? state.collections.collections[id] : undefined,
  );
+  const editorStateId = useAppSelector((state) => state.collections.editor.id);
  const isEditMode = !!id;
  const isLoading = isEditMode && !collection;

@@ -77,6 +81,18 @@ export const CollectionEditorPage: React.FC<{
    }
  }, [dispatch, id]);

+  useEffect(() => {
+    if (id !== editorStateId) {
+      void dispatch(collectionEditorActions.reset());
+    }
+  }, [dispatch, editorStateId, id]);
+
+  useEffect(() => {
+    if (collection) {
+      void dispatch(collectionEditorActions.init(collection));
+    }
+  }, [dispatch, collection]);
+
  const pageTitle = intl.formatMessage(usePageTitle(id));

  return (
@@ -104,7 +120,7 @@ export const CollectionEditorPage: React.FC<{
              exact
              path={`${path}/details`}
              // eslint-disable-next-line react/jsx-no-bind
-              render={() => <CollectionDetails collection={collection} />}
+              render={() => <CollectionDetails />}
            />
          </Switch>
        )}
--- a/app/javascript/mastodon/features/collections/editor/state.ts
+++ b/app/javascript/mastodon/features/collections/editor/state.ts
@@ -1,52 +0,0 @@
-import type {
-  ApiCollectionJSON,
-  ApiCreateCollectionPayload,
-} from '@/mastodon/api_types/collections';
-
-/**
- * Temporary editor state across creation steps,
- * kept in location state
- */
-export type TempCollectionState =
-  | Partial<ApiCreateCollectionPayload>
-  | undefined;
-
-/**
- * Resolve initial editor state. Temporary location state
- * trumps stored data, otherwise initial values are returned.
- */
-export function getCollectionEditorState(
-  collection: ApiCollectionJSON | null | undefined,
-  locationState: TempCollectionState,
-) {
-  const {
-    id,
-    name = '',
-    description = '',
-    tag,
-    language = '',
-    discoverable = true,
-    sensitive = false,
-    items,
-  } = collection ?? {};
-
-  const collectionItemIds =
-    items?.map((item) => item.account_id).filter(onlyExistingIds) ?? [];
-
-  const initialItemIds = (
-    locationState?.account_ids ?? collectionItemIds
-  ).filter(onlyExistingIds);
-
-  return {
-    id,
-    initialItemIds,
-    initialName: locationState?.name ?? name,
-    initialDescription: locationState?.description ?? description,
-    initialTopic: locationState?.tag_name ?? tag?.name ?? '',
-    initialLanguage: locationState?.language ?? language,
-    initialDiscoverable: locationState?.discoverable ?? discoverable,
-    initialSensitive: locationState?.sensitive ?? sensitive,
-  };
-}
-
-const onlyExistingIds = (id?: string): id is string => !!id;
--- a/app/javascript/mastodon/locales/en.json
+++ b/app/javascript/mastodon/locales/en.json
@@ -173,7 +173,8 @@
  "account_edit.field_edit_modal.link_emoji_warning": "We recommend against the use of custom emoji in combination with urls. Custom fields containing both will display as text only instead of as a link, in order to prevent user confusion.",
  "account_edit.field_edit_modal.name_hint": "E.g. “Personal website”",
  "account_edit.field_edit_modal.name_label": "Label",
-  "account_edit.field_edit_modal.value_hint": "E.g. “example.me”",
+  "account_edit.field_edit_modal.url_warning": "To add a link, please include {protocol} at the beginning.",
+  "account_edit.field_edit_modal.value_hint": "E.g. “https://example.me”",
  "account_edit.field_edit_modal.value_label": "Value",
  "account_edit.field_reorder_modal.drag_cancel": "Dragging was cancelled. Field \"{item}\" was dropped.",
  "account_edit.field_reorder_modal.drag_end": "Field \"{item}\" was dropped.",
--- a/app/javascript/mastodon/locales/fr-CA.json
+++ b/app/javascript/mastodon/locales/fr-CA.json
@@ -338,12 +338,14 @@
  "collections.create_collection": "Créer une collection",
  "collections.delete_collection": "Supprimer la collection",
  "collections.description_length_hint": "Maximum 100 caractères",
+  "collections.detail.accept_inclusion": "D'accord",
  "collections.detail.accounts_heading": "Comptes",
  "collections.detail.author_added_you": "{author} vous a ajouté·e à cette collection",
  "collections.detail.curated_by_author": "Organisée par {author}",
  "collections.detail.curated_by_you": "Organisée par vous",
  "collections.detail.loading": "Chargement de la collection…",
  "collections.detail.other_accounts_in_collection": "Autres comptes dans cette collection :",
+  "collections.detail.revoke_inclusion": "Me retirer",
  "collections.detail.sensitive_note": "Cette collection contient des comptes et du contenu qui peut être sensibles.",
  "collections.detail.share": "Partager la collection",
  "collections.edit_details": "Modifier les détails",
@@ -359,6 +361,9 @@
  "collections.old_last_post_note": "Dernière publication il y a plus d'une semaine",
  "collections.remove_account": "Supprimer ce compte",
  "collections.report_collection": "Signaler cette collection",
+  "collections.revoke_collection_inclusion": "Me retirer de cette collection",
+  "collections.revoke_inclusion.confirmation": "Vous avez été retiré·e de « {collection} »",
+  "collections.revoke_inclusion.error": "Une erreur s'est produite, veuillez réessayer plus tard.",
  "collections.search_accounts_label": "Chercher des comptes à ajouter…",
  "collections.search_accounts_max_reached": "Vous avez ajouté le nombre maximum de comptes",
  "collections.sensitive": "Sensible",
@@ -482,6 +487,9 @@
  "confirmations.remove_from_followers.confirm": "Supprimer l'abonné·e",
  "confirmations.remove_from_followers.message": "{name} cessera de vous suivre. Voulez-vous vraiment continuer ?",
  "confirmations.remove_from_followers.title": "Supprimer l'abonné·e ?",
+  "confirmations.revoke_collection_inclusion.confirm": "Me retirer",
+  "confirmations.revoke_collection_inclusion.message": "Cette action est permanente, la personne qui gère la collection ne pourra plus vous y rajouter plus tard.",
+  "confirmations.revoke_collection_inclusion.title": "Vous retirer de cette collection ?",
  "confirmations.revoke_quote.confirm": "Retirer le message",
  "confirmations.revoke_quote.message": "Cette action ne peut pas être annulée.",
  "confirmations.revoke_quote.title": "Retirer le message ?",
--- a/app/javascript/mastodon/locales/fr.json
+++ b/app/javascript/mastodon/locales/fr.json
@@ -338,12 +338,14 @@
  "collections.create_collection": "Créer une collection",
  "collections.delete_collection": "Supprimer la collection",
  "collections.description_length_hint": "Maximum 100 caractères",
+  "collections.detail.accept_inclusion": "D'accord",
  "collections.detail.accounts_heading": "Comptes",
  "collections.detail.author_added_you": "{author} vous a ajouté·e à cette collection",
  "collections.detail.curated_by_author": "Organisée par {author}",
  "collections.detail.curated_by_you": "Organisée par vous",
  "collections.detail.loading": "Chargement de la collection…",
  "collections.detail.other_accounts_in_collection": "Autres comptes dans cette collection :",
+  "collections.detail.revoke_inclusion": "Me retirer",
  "collections.detail.sensitive_note": "Cette collection contient des comptes et du contenu qui peut être sensibles.",
  "collections.detail.share": "Partager la collection",
  "collections.edit_details": "Modifier les détails",
@@ -359,6 +361,9 @@
  "collections.old_last_post_note": "Dernière publication il y a plus d'une semaine",
  "collections.remove_account": "Supprimer ce compte",
  "collections.report_collection": "Signaler cette collection",
+  "collections.revoke_collection_inclusion": "Me retirer de cette collection",
+  "collections.revoke_inclusion.confirmation": "Vous avez été retiré·e de « {collection} »",
+  "collections.revoke_inclusion.error": "Une erreur s'est produite, veuillez réessayer plus tard.",
  "collections.search_accounts_label": "Chercher des comptes à ajouter…",
  "collections.search_accounts_max_reached": "Vous avez ajouté le nombre maximum de comptes",
  "collections.sensitive": "Sensible",
@@ -482,6 +487,9 @@
  "confirmations.remove_from_followers.confirm": "Supprimer l'abonné·e",
  "confirmations.remove_from_followers.message": "{name} cessera de vous suivre. Voulez-vous vraiment continuer ?",
  "confirmations.remove_from_followers.title": "Supprimer l'abonné·e ?",
+  "confirmations.revoke_collection_inclusion.confirm": "Me retirer",
+  "confirmations.revoke_collection_inclusion.message": "Cette action est permanente, la personne qui gère la collection ne pourra plus vous y rajouter plus tard.",
+  "confirmations.revoke_collection_inclusion.title": "Vous retirer de cette collection ?",
  "confirmations.revoke_quote.confirm": "Retirer le message",
  "confirmations.revoke_quote.message": "Cette action ne peut pas être annulée.",
  "confirmations.revoke_quote.title": "Retirer le message ?",
--- a/app/javascript/mastodon/locales/hu.json
+++ b/app/javascript/mastodon/locales/hu.json
@@ -177,7 +177,10 @@
  "account_edit.field_edit_modal.value_label": "Érték",
  "account_edit.field_reorder_modal.drag_cancel": "Az áthúzás megszakítva. A(z) „{item}” mező el lett dobva.",
  "account_edit.field_reorder_modal.drag_end": "A(z) „{item}” mező el lett dobva.",
+  "account_edit.field_reorder_modal.drag_instructions": "Az egyéni mezők átrendezéséhez nyomj Szóközt vagy Entert. Húzás közben használd a nyílgombokat a mező felfelé vagy lefelé mozgatásához. A mező új pozícióba helyezéséhez nyomd meg a Szóközt vagy az Entert, vagy a megszakításhoz nyomd meg az Esc gombot.",
  "account_edit.field_reorder_modal.drag_move": "A(z) „{item}” mező át lett helyezve.",
+  "account_edit.field_reorder_modal.drag_over": "A(z) „{item}” mező át lett helyezve ennek a helyére: „{over}”.",
+  "account_edit.field_reorder_modal.drag_start": "A(z) „{item}” mező áthelyezéshez felvéve.",
  "account_edit.field_reorder_modal.handle_label": "A(z) „{item}” mező húzása",
  "account_edit.field_reorder_modal.title": "Mezők átrendezése",
  "account_edit.name_modal.add_title": "Megjelenítendő név hozzáadása",
@@ -194,6 +197,8 @@
  "account_edit.profile_tab.subtitle": "Szabd testre a profilodon látható lapokat, és a megjelenített tartalmukat.",
  "account_edit.profile_tab.title": "Profil lap beállításai",
  "account_edit.save": "Mentés",
+  "account_edit.verified_modal.details": "Növeld a Mastodon-profilod hitelességét a személyes webhelyekre mutató hivatkozások ellenőrzésével. Így működik:",
+  "account_edit.verified_modal.invisible_link.details": "A hivatkozás hozzáadása a fejlécedhez. A fontos rész a rel=\"me\", mely megakadályozza, hogy mások a nevedben lépjenek fel olyan oldalakon, ahol van felhasználók által előállított tartalom. A(z) {tag} helyett a „link” címkét is használhatod az oldal fejlécében, de a HTML-nek elérhetőnek kell lennie JavaScript futtatása nélkül is.",
  "account_edit.verified_modal.invisible_link.summary": "Hogyan lehet egy hivatkozás láthatatlanná tenni?",
  "account_edit.verified_modal.step1.header": "Másold a lenti HTML-kódot és illeszd be a webhelyed fejlécébe",
  "account_edit.verified_modal.step2.details": "Ha már egyéni mezőként hozzáadtad a webhelyedet, akkor törölnöd kell, újból hozzá kell adnod, hogy újra ellenőrizve legyen.",
--- a/app/javascript/mastodon/locales/ro.json
+++ b/app/javascript/mastodon/locales/ro.json
@@ -1,6 +1,7 @@
 {
  "about.blocks": "Servere moderate",
  "about.contact": "Contact:",
+  "about.default_locale": "Standard",
  "about.disclaimer": "Mastodon este o aplicație gratuită, cu sursă deschisă și o marcă înregistrată a Mastodon gGmbH.",
  "about.domain_blocks.no_reason_available": "Motivul nu este disponibil",
  "about.domain_blocks.preamble": "Mastodon îți permite în general să vezi conținut de la și să interacționezi cu utilizatori de pe oricare server în fediverse. Acestea sunt excepțiile care au fost făcute pe acest server.",
@@ -8,22 +9,33 @@
  "about.domain_blocks.silenced.title": "Limitat",
  "about.domain_blocks.suspended.explanation": "Nicio informație de la acest server nu va fi procesată, stocată sau trimisă, făcând imposibilă orice interacțiune sau comunicare cu utilizatorii de pe acest server.",
  "about.domain_blocks.suspended.title": "Suspendat",
+  "about.language_label": "Limbă",
  "about.not_available": "Această informație nu a fost pusă la dispoziție pe acest server.",
  "about.powered_by": "Media socială descentralizată furnizată de {mastodon}",
  "about.rules": "Reguli server",
  "account.account_note_header": "Notă personală",
+  "account.activity": "Activități",
+  "account.add_note": "Adaugă o notă personală",
  "account.add_or_remove_from_list": "Adaugă sau elimină din liste",
+  "account.badges.admin": "Admin",
+  "account.badges.blocked": "Blocat",
  "account.badges.bot": "Robot",
+  "account.badges.domain_blocked": "Domeniu blocat",
  "account.badges.group": "Grup",
+  "account.badges.muted": "Silențios",
+  "account.badges.muted_until": "Silențios până la {until}",
  "account.block": "Blochează pe @{name}",
  "account.block_domain": "Blochează domeniul {domain}",
  "account.block_short": "Blochează",
  "account.blocked": "Blocat",
+  "account.blocking": "Blocarea",
  "account.cancel_follow_request": "Retrage cererea de urmărire",
  "account.copy": "Copiază link-ul profilului",
  "account.direct": "Menționează pe @{name} în privat",
  "account.disable_notifications": "Nu îmi mai trimite notificări când postează @{name}",
+  "account.edit_note": "Editare notă personală",
  "account.edit_profile": "Modifică profilul",
+  "account.edit_profile_short": "Editare",
  "account.enable_notifications": "Trimite-mi o notificare când postează @{name}",
  "account.endorse": "Promovează pe profil",
  "account.featured_tags.last_status_at": "Ultima postare pe {date}",
--- a/app/javascript/mastodon/locales/tr.json
+++ b/app/javascript/mastodon/locales/tr.json
@@ -338,12 +338,14 @@
  "collections.create_collection": "Koleksiyon oluştur",
  "collections.delete_collection": "Koleksiyonu sil",
  "collections.description_length_hint": "100 karakterle sınırlı",
+  "collections.detail.accept_inclusion": "Tamam",
  "collections.detail.accounts_heading": "Hesaplar",
  "collections.detail.author_added_you": "{author} sizi koleksiyonuna ekledi",
  "collections.detail.curated_by_author": "{author} tarafından derlenen",
  "collections.detail.curated_by_you": "Sizin derledikleriniz",
  "collections.detail.loading": "Koleksiyon yükleniyor…",
  "collections.detail.other_accounts_in_collection": "Bu koleksiyondaki diğer kişiler:",
+  "collections.detail.revoke_inclusion": "Beni çıkar",
  "collections.detail.sensitive_note": "Bu koleksiyon bazı kullanıcılar için hassas olabilecek hesap ve içerik içerebilir.",
  "collections.detail.share": "Bu koleksiyonu paylaş",
  "collections.edit_details": "Ayrıntıları düzenle",
@@ -359,6 +361,9 @@
  "collections.old_last_post_note": "Son gönderi bir haftadan önce",
  "collections.remove_account": "Bu hesabı çıkar",
  "collections.report_collection": "Bu koleksiyonu bildir",
+  "collections.revoke_collection_inclusion": "Beni bu koleksiyondan çıkar",
+  "collections.revoke_inclusion.confirmation": "\"{collection}\" koleksiyonundan çıkarıldınız",
+  "collections.revoke_inclusion.error": "Bir hata oluştu, lütfen daha sonra tekrar deneyin.",
  "collections.search_accounts_label": "Eklemek için hesap arayın…",
  "collections.search_accounts_max_reached": "Maksimum hesabı eklediniz",
  "collections.sensitive": "Hassas",
@@ -482,6 +487,9 @@
  "confirmations.remove_from_followers.confirm": "Takipçi kaldır",
  "confirmations.remove_from_followers.message": "{name} sizi takip etmeyi bırakacaktır. Devam etmek istediğinize emin misiniz?",
  "confirmations.remove_from_followers.title": "Takipçiyi kaldır?",
+  "confirmations.revoke_collection_inclusion.confirm": "Beni çıkar",
+  "confirmations.revoke_collection_inclusion.message": "Bu eylem kalıcıdır ve koleksiyonu derleyen kişi daha sonra sizi koleksiyona tekrar ekleyemeyecektir.",
+  "confirmations.revoke_collection_inclusion.title": "Kendini bu koleksiyondan çıkar?",
  "confirmations.revoke_quote.confirm": "Gönderiyi kaldır",
  "confirmations.revoke_quote.message": "Bu işlem geri alınamaz.",
  "confirmations.revoke_quote.title": "Gönderiyi silmek ister misiniz?",
--- a/app/javascript/mastodon/reducers/slices/collections.ts
+++ b/app/javascript/mastodon/reducers/slices/collections.ts
@@ -1,3 +1,4 @@
+import type { PayloadAction } from '@reduxjs/toolkit';
 import { createSlice } from '@reduxjs/toolkit';

 import { importFetchedAccounts } from '@/mastodon/actions/importer';
@@ -36,17 +37,69 @@ interface CollectionState {
      status: QueryStatus;
    }
  >;
+  editor: EditorState;
+}
+
+interface EditorState {
+  id: string | null;
+  name: string;
+  description: string;
+  topic: string;
+  language: string | null;
+  discoverable: boolean;
+  sensitive: boolean;
+  accountIds: string[];
+}
+
+interface UpdateEditorFieldPayload<K extends keyof EditorState> {
+  field: K;
+  value: EditorState[K];
 }

 const initialState: CollectionState = {
  collections: {},
  accountCollections: {},
+  editor: {
+    id: null,
+    name: '',
+    description: '',
+    topic: '',
+    language: null,
+    discoverable: true,
+    sensitive: false,
+    accountIds: [],
+  },
 };

 const collectionSlice = createSlice({
  name: 'collections',
  initialState,
-  reducers: {},
+  reducers: {
+    init(state, action: PayloadAction<ApiCollectionJSON | null>) {
+      const collection = action.payload;
+
+      state.editor = {
+        id: collection?.id ?? null,
+        name: collection?.name ?? '',
+        description: collection?.description ?? '',
+        topic: collection?.tag?.name ?? '',
+        language: collection?.language ?? '',
+        discoverable: collection?.discoverable ?? true,
+        sensitive: collection?.sensitive ?? false,
+        accountIds: getCollectionItemIds(collection?.items ?? []),
+      };
+    },
+    reset(state) {
+      state.editor = initialState.editor;
+    },
+    updateEditorField<K extends keyof EditorState>(
+      state: CollectionState,
+      action: PayloadAction<UpdateEditorFieldPayload<K>>,
+    ) {
+      const { field, value } = action.payload;
+      state.editor[field] = value;
+    },
+  },
  extraReducers(builder) {
    /**
     * Fetching account collections
@@ -104,6 +157,7 @@ const collectionSlice = createSlice({
    builder.addCase(updateCollection.fulfilled, (state, action) => {
      const { collection } = action.payload;
      state.collections[collection.id] = collection;
+      state.editor = initialState.editor;
    });

    /**
@@ -132,6 +186,7 @@ const collectionSlice = createSlice({
      const { collection } = actions.payload;

      state.collections[collection.id] = collection;
+      state.editor = initialState.editor;

      if (state.accountCollections[collection.account_id]) {
        state.accountCollections[collection.account_id]?.collectionIds.unshift(
@@ -240,6 +295,9 @@ export const revokeCollectionInclusion = createAppAsyncThunk(
 );

 export const collections = collectionSlice.reducer;
+export const collectionEditorActions = collectionSlice.actions;
+export const updateCollectionEditorField =
+  collectionSlice.actions.updateEditorField;

 /**
 * Selectors
@@ -278,3 +336,8 @@ export const selectAccountCollections = createAppSelector(
    } satisfies AccountCollectionQuery;
  },
 );
+
+const onlyExistingIds = (id?: string): id is string => !!id;
+
+export const getCollectionItemIds = (items?: ApiCollectionJSON['items']) =>
+  items?.map((item) => item.account_id).filter(onlyExistingIds) ?? [];
--- a/app/javascript/mastodon/reducers/slices/profile_edit.ts
+++ b/app/javascript/mastodon/reducers/slices/profile_edit.ts
@@ -221,7 +221,12 @@ export const patchProfile = createDataLoadingThunk(
  `${profileEditSlice.name}/patchProfile`,
  (params: Partial<ApiProfileUpdateParams>) => apiPatchProfile(params),
  transformProfile,
-  { useLoadingBar: false },
+  {
+    useLoadingBar: false,
+    condition(_, { getState }) {
+      return !getState().profileEdit.isPending;
+    },
+  },
 );

 export const selectFieldById = createAppSelector(
--- a/app/javascript/mastodon/utils/checks.test.ts
+++ b/app/javascript/mastodon/utils/checks.test.ts
@@ -0,0 +1,21 @@
+import { isUrlWithoutProtocol } from './checks';
+
+describe('isUrlWithoutProtocol', () => {
+  test.concurrent.each([
+    ['example.com', true],
+    ['sub.domain.co.uk', true],
+    ['example', false], // No dot
+    ['example..com', false], // Consecutive dots
+    ['example.com.', false], // Trailing dot
+    ['example.c', false], // TLD too short
+    ['example.123', false], // Numeric TLDs are not valid
+    ['example.com/path', true], // Paths are allowed
+    ['example.com?query=string', true], // Query strings are allowed
+    ['example.com#fragment', true], // Fragments are allowed
+    ['example .com', false], // Spaces are not allowed
+    ['example://com', false], // Protocol inside the string is not allowed
+    ['example.com^', false], // Invalid characters not allowed
+  ])('should return %s for input "%s"', (input, expected) => {
+    expect(isUrlWithoutProtocol(input)).toBe(expected);
+  });
+});
--- a/app/javascript/mastodon/utils/checks.ts
+++ b/app/javascript/mastodon/utils/checks.ts
@@ -9,3 +9,29 @@ export function isValidUrl(
    return false;
  }
 }
+
+/**
+ * Checks if the input string is probably a URL without a protocol. Note this is not full URL validation,
+ * and is mostly used to detect link-like inputs.
+ * @see https://www.xjavascript.com/blog/check-if-a-javascript-string-is-a-url/
+ * @param input The input string to check
+ */
+export function isUrlWithoutProtocol(input: string): boolean {
+  if (!input.length || input.includes(' ') || input.includes('://')) {
+    return false;
+  }
+
+  try {
+    const url = new URL(`http://${input}`);
+    const { host } = url;
+    return (
+      host !== '' && // Host is not empty
+      host.includes('.') && // Host contains at least one dot
+      !host.endsWith('.') && // No trailing dot
+      !host.includes('..') && // No consecutive dots
+      /\.[\w]{2,}$/.test(host) // TLD is at least 2 characters
+    );
+  } catch {}
+
+  return false;
+}
--- a/app/javascript/mastodon/utils/hashtags.test.ts
+++ b/app/javascript/mastodon/utils/hashtags.test.ts
@@ -0,0 +1,28 @@
+import { inputToHashtag } from './hashtags';
+
+describe('inputToHashtag', () => {
+  test.concurrent.each([
+    ['', ''],
+    // Prepend or keep hashtag
+    ['mastodon', '#mastodon'],
+    ['#mastodon', '#mastodon'],
+    // Preserve trailing whitespace
+    ['mastodon  ', '#mastodon  '],
+    ['   ', '#   '],
+    // Collapse whitespace & capitalise first character
+    ['cats of mastodon', '#catsOfMastodon'],
+    ['x y z', '#xYZ'],
+    ['   mastodon', '#mastodon'],
+    // Preserve initial casing
+    ['Log in', '#LogIn'],
+    ['#NaturePhotography', '#NaturePhotography'],
+    // Normalise hash symbol variant
+    ['＃nature', '#nature'],
+    ['＃Nature Photography', '#NaturePhotography'],
+    // Allow special characters
+    ['hello-world', '#hello-world'],
+    ['hello,world', '#hello,world'],
+  ])('for input "%s", return "%s"', (input, expected) => {
+    expect(inputToHashtag(input)).toBe(expected);
+  });
+});
--- a/app/javascript/mastodon/utils/hashtags.ts
+++ b/app/javascript/mastodon/utils/hashtags.ts
@@ -27,3 +27,35 @@ const buildHashtagRegex = () => {
 export const HASHTAG_PATTERN_REGEX = buildHashtagPatternRegex();

 export const HASHTAG_REGEX = buildHashtagRegex();
+
+/**
+ * Formats an input string as a hashtag:
+ * - Prepends `#` unless present
+ * - Strips spaces (except at the end, to allow typing it)
+ * - Capitalises first character after stripped space
+ */
+export const inputToHashtag = (input: string): string => {
+  if (!input) {
+    return '';
+  }
+
+  const trailingSpace = /\s+$/.exec(input)?.[0] ?? '';
+  const trimmedInput = input.trimEnd();
+
+  const withoutHash =
+    trimmedInput.startsWith('#') || trimmedInput.startsWith('＃')
+      ? trimmedInput.slice(1)
+      : trimmedInput;
+
+  // Split by space, filter empty strings, and capitalise the start of each word but the first
+  const words = withoutHash
+    .split(/\s+/)
+    .filter((word) => word.length > 0)
+    .map((word, index) =>
+      index === 0
+        ? word
+        : word.charAt(0).toUpperCase() + word.slice(1).toLowerCase(),
+    );
+
+  return `#${words.join('')}${trailingSpace}`;
+};
--- a/app/lib/request.rb
+++ b/app/lib/request.rb
@@ -208,7 +208,7 @@ class Request
      return
    end

-    signature_value = @signing.sign(signed_headers.without('User-Agent', 'Accept-Encoding'), @verb, Addressable::URI.parse(request.uri))
+    signature_value = @signing.sign(signed_headers.without('User-Agent', 'Accept-Encoding', 'Accept'), @verb, Addressable::URI.parse(request.uri))
    request.headers['Signature'] = signature_value
  end

--- a/app/mailers/admin_mailer.rb
+++ b/app/mailers/admin_mailer.rb
@@ -11,30 +11,26 @@ class AdminMailer < ApplicationMailer

  after_action :set_important_headers!, only: :new_critical_software_updates

+  around_action :set_locale
+
  default to: -> { @me.user_email }

  def new_report(report)
    @report = report

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance, id: @report.id)
-    end
+    mail subject: default_i18n_subject(instance: @instance, id: @report.id)
  end

  def new_appeal(appeal)
    @appeal = appeal

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance, username: @appeal.account.username)
-    end
+    mail subject: default_i18n_subject(instance: @instance, username: @appeal.account.username)
  end

  def new_pending_account(user)
    @account = user.account

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance, username: @account.username)
-    end
+    mail subject: default_i18n_subject(instance: @instance, username: @account.username)
  end

  def new_trends(links, tags, statuses)
@@ -42,31 +38,23 @@ class AdminMailer < ApplicationMailer
    @tags                   = tags
    @statuses               = statuses

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance)
-    end
+    mail subject: default_i18n_subject(instance: @instance)
  end

  def new_software_updates
    @software_updates = SoftwareUpdate.by_version

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance)
-    end
+    mail subject: default_i18n_subject(instance: @instance)
  end

  def new_critical_software_updates
    @software_updates = SoftwareUpdate.urgent.by_version

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance)
-    end
+    mail subject: default_i18n_subject(instance: @instance)
  end

  def auto_close_registrations
-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(instance: @instance)
-    end
+    mail subject: default_i18n_subject(instance: @instance)
  end

  private
@@ -79,6 +67,10 @@ class AdminMailer < ApplicationMailer
    @instance = Rails.configuration.x.local_domain
  end

+  def set_locale(&block)
+    locale_for_account(@me, &block)
+  end
+
  def set_important_headers!
    headers(
      'Importance' => 'high',
--- a/app/mailers/notification_mailer.rb
+++ b/app/mailers/notification_mailer.rb
@@ -15,6 +15,8 @@ class NotificationMailer < ApplicationMailer

  before_deliver :verify_functional_user

+  around_action :set_locale
+
  default to: -> { email_address_with_name(@user.email, @me.username) }

  layout 'mailer'
@@ -22,45 +24,33 @@ class NotificationMailer < ApplicationMailer
  def mention
    return if @status.blank?

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @status.account.acct)
-    end
+    mail subject: default_i18n_subject(name: @status.account.acct)
  end

  def quote
    return if @status.blank?

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @status.account.acct)
-    end
+    mail subject: default_i18n_subject(name: @status.account.acct)
  end

  def follow
-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @account.acct)
-    end
+    mail subject: default_i18n_subject(name: @account.acct)
  end

  def favourite
    return if @status.blank?

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @account.acct)
-    end
+    mail subject: default_i18n_subject(name: @account.acct)
  end

  def reblog
    return if @status.blank?

-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @account.acct)
-    end
+    mail subject: default_i18n_subject(name: @account.acct)
  end

  def follow_request
-    locale_for_account(@me) do
-      mail subject: default_i18n_subject(name: @account.acct)
-    end
+    mail subject: default_i18n_subject(name: @account.acct)
  end

  private
@@ -81,6 +71,10 @@ class NotificationMailer < ApplicationMailer
    @account = @notification.from_account
  end

+  def set_locale(&block)
+    locale_for_account(@me, &block)
+  end
+
  def verify_functional_user
    throw(:abort) unless @user.functional?
  end
--- a/app/models/collection.rb
+++ b/app/models/collection.rb
@@ -22,6 +22,8 @@
 #
 class Collection < ApplicationRecord
  MAX_ITEMS = 25
+  NAME_LENGTH_HARD_LIMIT = 256
+  DESCRIPTION_LENGTH_HARD_LIMIT = 2048

  belongs_to :account
  belongs_to :tag, optional: true
@@ -31,10 +33,16 @@ class Collection < ApplicationRecord
  has_many :collection_reports, dependent: :delete_all

  validates :name, presence: true
-  validates :description, presence: true,
-                          if: :local?
-  validates :description_html, presence: true,
-                               if: :remote?
+  validates :name, length: { maximum: 40 }, if: :local?
+  validates :name, length: { maximum: NAME_LENGTH_HARD_LIMIT }, if: :remote?
+  validates :description,
+            presence: true,
+            length: { maximum: 100 },
+            if: :local?
+  validates :description_html,
+            presence: true,
+            length: { maximum: DESCRIPTION_LENGTH_HARD_LIMIT },
+            if: :remote?
  validates :local, inclusion: [true, false]
  validates :sensitive, inclusion: [true, false]
  validates :discoverable, inclusion: [true, false]
--- a/app/models/email_domain_block.rb
+++ b/app/models/email_domain_block.rb
@@ -59,7 +59,7 @@ class EmailDomainBlock < ApplicationRecord

    def blocking?(allow_with_approval: false)
      blocks = EmailDomainBlock.where(domain: domains_with_variants, allow_with_approval: allow_with_approval).by_domain_length
-      blocks.each { |block| block.history.add(@attempt_ip) } if @attempt_ip.present?
+      blocks.each { |block| block.history.add(@attempt_ip.to_s) } if @attempt_ip.present?
      blocks.any?
    end

--- a/app/models/trends/history.rb
+++ b/app/models/trends/history.rb
@@ -40,11 +40,11 @@ class Trends::History
      with_redis { |redis| redis.get(key_for(:uses)).to_i }
    end

-    def add(account_id)
+    def add(value)
      with_redis do |redis|
        redis.pipelined do |pipeline|
          pipeline.incrby(key_for(:uses), 1)
-          pipeline.pfadd(key_for(:accounts), account_id)
+          pipeline.pfadd(key_for(:accounts), value)
          pipeline.expire(key_for(:uses), EXPIRE_AFTER)
          pipeline.expire(key_for(:accounts), EXPIRE_AFTER)
        end
--- a/app/serializers/rest/collection_serializer.rb
+++ b/app/serializers/rest/collection_serializer.rb
@@ -14,7 +14,9 @@ class REST::CollectionSerializer < ActiveModel::Serializer
  end

  def description
-    object.local? ? object.description : object.description_html
+    return object.description if object.local?
+
+    Sanitize.fragment(object.description_html, Sanitize::Config::MASTODON_STRICT)
  end

  def items
--- a/app/services/activitypub/process_featured_collection_service.rb
+++ b/app/services/activitypub/process_featured_collection_service.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+class ActivityPub::ProcessFeaturedCollectionService
+  include JsonLdHelper
+  include Lockable
+  include Redisable
+
+  ITEMS_LIMIT = 150
+
+  def call(account, json)
+    @account = account
+    @json = json
+    return if non_matching_uri_hosts?(@account.uri, @json['id'])
+
+    with_redis_lock("collection:#{@json['id']}") do
+      return if @account.collections.exists?(uri: @json['id'])
+
+      @collection = @account.collections.create!(
+        local: false,
+        uri: @json['id'],
+        name: (@json['name'] || '')[0, Collection::NAME_LENGTH_HARD_LIMIT],
+        description_html: truncated_summary,
+        language:,
+        sensitive: @json['sensitive'],
+        discoverable: @json['discoverable'],
+        original_number_of_items: @json['totalItems'] || 0,
+        tag_name: @json.dig('topic', 'name')
+      )
+
+      process_items!
+
+      @collection
+    end
+  end
+
+  private
+
+  def truncated_summary
+    text = @json['summaryMap']&.values&.first || @json['summary'] || ''
+    text[0, Collection::DESCRIPTION_LENGTH_HARD_LIMIT]
+  end
+
+  def language
+    @json['summaryMap']&.keys&.first
+  end
+
+  def process_items!
+    @json['orderedItems'].take(ITEMS_LIMIT).each do |item_json|
+      ActivityPub::ProcessFeaturedItemWorker.perform_async(@collection.id, item_json)
+    end
+  end
+end
--- a/app/workers/activitypub/process_featured_item_worker.rb
+++ b/app/workers/activitypub/process_featured_item_worker.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class ActivityPub::ProcessFeaturedItemWorker
+  include Sidekiq::Worker
+  include ExponentialBackoff
+
+  sidekiq_options queue: 'pull', retry: 3
+
+  def perform(collection_id, id_or_json)
+    collection = Collection.find(collection_id)
+
+    ActivityPub::ProcessFeaturedItemService.new.call(collection, id_or_json)
+  rescue ActiveRecord::RecordNotFound
+    true
+  end
+end
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -92,3 +92,6 @@ end
 Sidekiq.strict_args!

 Redis.raise_deprecations = true
+
+# Silence deprecation warning from json-schema
+JSON::Validator.use_multi_json = false
--- a/lib/action_dispatch/remote_ip_extensions.rb
+++ b/lib/action_dispatch/remote_ip_extensions.rb
@@ -17,11 +17,11 @@ module ActionDispatch
    module GetIpExtensions
      def calculate_ip
        # Set by the Rack web server, this is a single value.
-        remote_addr = ips_from(@req.remote_addr).last
+        remote_addr = sanitize_ips(ips_from(@req.remote_addr)).last

        # Could be a CSV list and/or repeated headers that were concatenated.
-        client_ips    = ips_from(@req.client_ip).reverse!
-        forwarded_ips = ips_from(@req.x_forwarded_for).reverse!
+        client_ips    = sanitize_ips(ips_from(@req.client_ip)).reverse!
+        forwarded_ips = sanitize_ips(@req.forwarded_for || []).reverse!

        # `Client-Ip` and `X-Forwarded-For` should not, generally, both be set. If they
        # are both set, it means that either:
--- a/spec/models/collection_spec.rb
+++ b/spec/models/collection_spec.rb
@@ -8,8 +8,12 @@ RSpec.describe Collection do

    it { is_expected.to validate_presence_of(:name) }

+    it { is_expected.to validate_length_of(:name).is_at_most(40) }
+
    it { is_expected.to validate_presence_of(:description) }

+    it { is_expected.to validate_length_of(:description).is_at_most(100) }
+
    it { is_expected.to_not allow_value(nil).for(:local) }

    it { is_expected.to_not allow_value(nil).for(:sensitive) }
@@ -23,10 +27,14 @@ RSpec.describe Collection do
    context 'when collection is remote' do
      subject { Fabricate.build :collection, local: false }

+      it { is_expected.to validate_length_of(:name).is_at_most(Collection::NAME_LENGTH_HARD_LIMIT) }
+
      it { is_expected.to_not validate_presence_of(:description) }

      it { is_expected.to validate_presence_of(:description_html) }

+      it { is_expected.to validate_length_of(:description_html).is_at_most(Collection::DESCRIPTION_LENGTH_HARD_LIMIT) }
+
      it { is_expected.to validate_presence_of(:uri) }

      it { is_expected.to validate_presence_of(:original_number_of_items) }
--- a/spec/models/email_domain_block_spec.rb
+++ b/spec/models/email_domain_block_spec.rb
@@ -56,16 +56,20 @@ RSpec.describe EmailDomainBlock do
  end

  describe '.requires_approval?' do
-    subject { described_class.requires_approval?(input) }
+    subject { described_class.requires_approval?(input, attempt_ip: IPAddr.new('100.100.100.100')) }

    let(:input) { nil }

    context 'with a matching block requiring approval' do
-      before { Fabricate :email_domain_block, domain: input, allow_with_approval: true }
+      let!(:email_domain_block) { Fabricate :email_domain_block, domain: input, allow_with_approval: true }

      let(:input) { 'host.example' }

-      it { is_expected.to be true }
+      it 'returns true and records attempt' do
+        expect do
+          expect(subject).to be(true)
+        end.to change { email_domain_block.history.get(Date.current).accounts }.by(1)
+      end
    end

    context 'with a matching block not requiring approval' do
--- a/spec/serializers/rest/collection_serializer_spec.rb
+++ b/spec/serializers/rest/collection_serializer_spec.rb
@@ -51,5 +51,14 @@ RSpec.describe REST::CollectionSerializer do
      expect(subject)
        .to include('description' => '<p>remote</p>')
    end
+
+    context 'when the description contains unwanted HTML' do
+      let(:description_html) { '<script>alert("hi!");</script><p>Nice people</p>' }
+      let(:collection) { Fabricate(:remote_collection, description_html:) }
+
+      it 'scrubs the HTML' do
+        expect(subject).to include('description' => '<p>Nice people</p>')
+      end
+    end
  end
 end
--- a/spec/services/activitypub/process_featured_collection_service_spec.rb
+++ b/spec/services/activitypub/process_featured_collection_service_spec.rb
@@ -0,0 +1,76 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ActivityPub::ProcessFeaturedCollectionService do
+  subject { described_class.new }
+
+  let(:account) { Fabricate(:remote_account) }
+  let(:summary) { '<p>A list of remote actors you should follow.</p>' }
+  let(:base_json) do
+    {
+      '@context' => 'https://www.w3.org/ns/activitystreams',
+      'id' => 'https://example.com/featured_collections/1',
+      'type' => 'FeaturedCollection',
+      'attributedTo' => account.uri,
+      'name' => 'Good people from other servers',
+      'sensitive' => false,
+      'discoverable' => true,
+      'topic' => {
+        'type' => 'Hashtag',
+        'name' => '#people',
+      },
+      'published' => '2026-03-09T15:19:25Z',
+      'totalItems' => 2,
+      'orderedItems' => [
+        'https://example.com/featured_items/1',
+        'https://example.com/featured_items/2',
+      ],
+    }
+  end
+  let(:featured_collection_json) { base_json.merge('summary' => summary) }
+
+  context "when the collection's URI does not match the account's" do
+    let(:non_matching_account) { Fabricate(:remote_account, domain: 'other.example.com') }
+
+    it 'does not create a collection and returns `nil`' do
+      expect do
+        expect(subject.call(non_matching_account, featured_collection_json)).to be_nil
+      end.to_not change(Collection, :count)
+    end
+  end
+
+  context 'when URIs match up' do
+    it 'creates a collection and queues jobs to handle its items' do
+      expect { subject.call(account, featured_collection_json) }.to change(account.collections, :count).by(1)
+
+      new_collection = account.collections.last
+      expect(new_collection.uri).to eq 'https://example.com/featured_collections/1'
+      expect(new_collection.name).to eq 'Good people from other servers'
+      expect(new_collection.description_html).to eq '<p>A list of remote actors you should follow.</p>'
+      expect(new_collection.sensitive).to be false
+      expect(new_collection.discoverable).to be true
+      expect(new_collection.tag.formatted_name).to eq '#people'
+
+      expect(ActivityPub::ProcessFeaturedItemWorker).to have_enqueued_sidekiq_job.exactly(2).times
+    end
+  end
+
+  context 'when the json includes a summary map' do
+    let(:featured_collection_json) do
+      base_json.merge({
+        'summaryMap' => {
+          'en' => summary,
+        },
+      })
+    end
+
+    it 'sets language and summary correctly' do
+      expect { subject.call(account, featured_collection_json) }.to change(account.collections, :count).by(1)
+
+      new_collection = account.collections.last
+      expect(new_collection.language).to eq 'en'
+      expect(new_collection.description_html).to eq '<p>A list of remote actors you should follow.</p>'
+    end
+  end
+end
--- a/spec/workers/activitypub/process_featured_item_worker_spec.rb
+++ b/spec/workers/activitypub/process_featured_item_worker_spec.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ActivityPub::ProcessFeaturedItemWorker do
+  subject { described_class.new }
+
+  let(:collection) { Fabricate(:remote_collection) }
+  let(:object) { 'https://example.com/featured_items/1' }
+  let(:stubbed_service) do
+    instance_double(ActivityPub::ProcessFeaturedItemService, call: true)
+  end
+
+  before do
+    allow(ActivityPub::ProcessFeaturedItemService).to receive(:new).and_return(stubbed_service)
+  end
+
+  describe 'perform' do
+    it 'calls the service to process the item' do
+      subject.perform(collection.id, object)
+
+      expect(stubbed_service).to have_received(:call).with(collection, object)
+    end
+  end
+end