fix: Assorted Typing Fixes (#3348)

With all the commits below, we resolve all outstanding typing issues in the repo, and CI jobs run green.

* fix: Convert DashboardPage and DashboardWidget to TypeScript

* fix: fix type errors in package manager ext

* fix: Convert Post component to TypeScript

* fix: avatar typings should accept null user

* fix: convert Notification component to TypeScript

* fix: properly use `typeof` in ForumApplication

* feat: make Notification content attr generic

* chore: format Notification component

* fix: Convert DiscussionRenamedNotification to TypeScript

* fix(pusher) move shims to a location where they get applied

* fix(pusher): fix some typing errors

* fix(akismet): fix some typing issues

* chore: update core dist typings

* chore(pusher): format

* fix: anchorScroll should accept string selectors

* fix: more accurately represent ApiQueryParamsPlural

* fix: convert PostStreamState to TypeScript

* chore(core): rebuild typings

* feat: allow extending app.routes

* fix: more flexible typings for highlight.ts

* fix: use primitive `number` type for Discussion typings

* fix: convert DiscussionListItem to TypeScript

* chore: rebuild core typings

* fix: final pusher type fixes

* feat: start tags TypeScript conversion

* fix: require-dev tags in pusher for CI TypeScript purposes.

* chore(core): format

* chore(tags): build dist typings

* feat(pusher): use dist types from tags.

* feat: convert flags to TypeScript

* chore(flags): generate dist typings

* fix(akismet): last type errors

* chore: update .yarn-integrity

* chore: partially run flarum-cli audit infra --fix

The tsconfig changes from that command are ignored, since we don't yet support "replacable sections" that would let us add custom config.

* chore: use type imports

* fix: broader gitattributes

* chore: run flarum-cli audit infra --monorepo --fix

* feat: make `app.data` typings extensible

* chore(core): format

* chore: boost tags TypeScript coverage

* fix(tags): further increase type coverage.

extensions/package-manager/js/src/admin/components/Installer.tsx

@@ -46,7 +46,7 @@ export default class Installer<Attrs> extends Component<Attrs> {
     app.modal.show(LoadingModal);
 
     app
-      .request({
+      .request<{ id: string }>({
         method: 'POST',
         url: `${app.forum.attribute('apiUrl')}/package-manager/extensions`,
         body: {

extensions/package-manager/js/src/admin/components/Updater.tsx

@@ -3,6 +3,7 @@ import app from 'flarum/admin/app';
 import Component from 'flarum/common/Component';
 import Button from 'flarum/common/components/Button';
 import humanTime from 'flarum/common/helpers/humanTime';
+import extractText from 'flarum/common/utils/extractText';
 import LoadingModal from 'flarum/admin/components/LoadingModal';
 import errorHandler from '../utils/errorHandler';
 import LoadingIndicator from 'flarum/common/components/LoadingIndicator';
@@ -188,7 +189,7 @@ export default class Updater<Attrs> extends Component<Attrs> {
   }
 
   updateCoreMinor() {
-    if (confirm(app.translator.trans('flarum-package-manager.admin.minor_update_confirmation.content'))) {
+    if (confirm(extractText(app.translator.trans('flarum-package-manager.admin.minor_update_confirmation.content')))) {
       app.modal.show(LoadingModal);
       this.isLoading = 'minor-update';