Fix case-sensitive look-up for profiles in web UI (#19397)

app/javascript/mastodon/features/account_timeline/index.js

@@ -19,11 +19,12 @@ import { connectTimeline, disconnectTimeline } from 'mastodon/actions/timelines'
 import LimitedAccountHint from './components/limited_account_hint';
 import { getAccountHidden } from 'mastodon/selectors';
 import { fetchFeaturedTags } from '../../actions/featured_tags';
+import { normalizeForLookup } from 'mastodon/reducers/accounts_map';
 
 const emptyList = ImmutableList();
 
 const mapStateToProps = (state, { params: { acct, id, tagged }, withReplies = false }) => {
-  const accountId = id || state.getIn(['accounts_map', acct]);
+  const accountId = id || state.getIn(['accounts_map', normalizeForLookup(acct)]);
 
   if (!accountId) {
     return {

app/javascript/mastodon/reducers/accounts_map.js

@@ -1,14 +1,16 @@
 import { ACCOUNT_IMPORT, ACCOUNTS_IMPORT } from '../actions/importer';
 import { Map as ImmutableMap } from 'immutable';
 
+export const normalizeForLookup = str => str.toLowerCase();
+
 const initialState = ImmutableMap();
 
 export default function accountsMap(state = initialState, action) {
   switch(action.type) {
   case ACCOUNT_IMPORT:
-    return state.set(action.account.acct, action.account.id);
+    return state.set(normalizeForLookup(action.account.acct), action.account.id);
   case ACCOUNTS_IMPORT:
-    return state.withMutations(map => action.accounts.forEach(account => map.set(account.acct, account.id)));
+    return state.withMutations(map => action.accounts.forEach(account => map.set(normalizeForLookup(account.acct), account.id)));
   default:
     return state;
   }