DEV: Update linting and run lttf (#37494)

eslint.config.mjs

@@ -3,21 +3,8 @@ import DiscourseRecommended from "@discourse/lint-configs/eslint";
 export default [
   ...DiscourseRecommended,
   {
-    rules: {
-      "discourse/moved-packages-import-paths": "error",
-      "discourse/no-route-template": "error",
-      "ember/avoid-leaking-state-in-ember-objects": "error",
-      "ember/no-classic-components": "error",
-      "ember/no-jquery": "error",
-      "ember/no-observers": "error",
-      "ember/no-side-effects": "error",
-      "ember/no-tracked-properties-from-args": "error",
-      "ember/require-tagless-components": "error",
-      "ember/route-path-style": "error",
-      "ember/routes-segments-snake-case": "error",
-      "qunit/no-assert-equal": "error",
-      "qunit/no-loose-assertions": "error",
-    },
+    rules: {},
+    // custom overrides go here
   },
   {
     ignores: [

frontend/discourse/tests/acceptance/user-menu-test.js

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { later } from "@ember/runloop";
 import {
   click,

frontend/discourse/tests/integration/components/composer-editor-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { click, fillIn, find, render } from "@ember/test-helpers";
 import { module, test } from "qunit";
 import ComposerEditor from "discourse/components/composer-editor";

frontend/discourse/tests/integration/components/d-editor-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { next } from "@ember/runloop";
 import {
   click,

frontend/discourse/tests/integration/components/dialog-holder-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import {
   click,
   fillIn,

frontend/discourse/tests/integration/components/email-logs-list-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { fillIn, render, waitFor } from "@ember/test-helpers";
 import { module, test } from "qunit";
 import EmailLogsList from "discourse/admin/components/email-logs-list";

frontend/discourse/tests/integration/components/emoji-uploader-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { fillIn, render } from "@ember/test-helpers";
 import { module, test } from "qunit";
 import EmojiUploader from "discourse/admin/components/emoji-uploader";

frontend/discourse/tests/integration/components/empty-topic-filter.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable discourse/test-filename-suffix */
 import { render } from "@ember/test-helpers";
 import { module, test } from "qunit";
 import EmptyTopicFilter from "discourse/components/empty-topic-filter";

frontend/discourse/tests/unit/lib/utilities-test.js

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { getOwner } from "@ember/owner";
 import { setupTest } from "ember-qunit";
 import { module, test } from "qunit";

package.json

@@ -4,12 +4,12 @@
   "author": "Discourse",
   "license": "GPL-2.0-only",
   "devDependencies": {
-    "@babel/plugin-proposal-decorators": "^7.28.0",
-    "@discourse/lint-configs": "^2.37.1",
+    "@babel/plugin-proposal-decorators": "^7.29.0",
+    "@discourse/lint-configs": "^2.39.0",
     "@discourse/moment-timezone-names-translations": "^1.0.0",
     "@fortawesome/fontawesome-free": "7.1.0",
-    "@glint/ember-tsc": "^1.0.8",
-    "@glint/tsserver-plugin": "^2.0.8",
+    "@glint/ember-tsc": "^1.1.1",
+    "@glint/tsserver-plugin": "^2.1.0",
     "@rdil/parallel-prettier": "^3.0.0",
     "@swc/core": "^1.15.7",
     "chrome-launcher": "^1.2.1",
@@ -19,15 +19,15 @@
     "esbuild": "^0.25.11",
     "eslint": "9.39.2",
     "jsdoc": "^4.0.5",
-    "lefthook": "^2.0.13",
+    "lefthook": "^2.1.0",
     "licensee": "^11.1.1",
     "lint-to-the-future": "^2.6.4",
-    "lint-to-the-future-ember-template": "^3.1.0",
+    "lint-to-the-future-ember-template": "^4.1.0",
     "lint-to-the-future-eslint": "^3.3.0",
     "playwright": "1.57.0",
-    "prettier": "3.8.0",
+    "prettier": "3.8.1",
     "puppeteer-core": "^24.34.0",
-    "stylelint": "17.0.0",
+    "stylelint": "17.1.0",
     "terser": "^5.44.1",
     "typescript": "^5.9.3"
   },

plugins/discourse-ai/test/javascripts/integration/components/ai-search-discoveries-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import Service from "@ember/service";
 import { click, render } from "@ember/test-helpers";
 import { module, test } from "qunit";

plugins/discourse-calendar/test/javascripts/unit/ics-generation-test.js

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { module, test } from "qunit";
 import {
   bbcodeAttributeDecode,

plugins/discourse-data-explorer/test/javascripts/components/param-input-test.gjs

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import { fillIn, render } from "@ember/test-helpers";
 import { module, test } from "qunit";
 import { setupRenderingTest } from "discourse/tests/helpers/component-test";

plugins/discourse-templates/test/javascripts/acceptance/lib/replace-variables-test.js

@@ -1,3 +1,4 @@
+/* eslint-disable qunit/no-conditional-assertions */
 import EmberObject from "@ember/object";
 import { test } from "qunit";
 import { acceptance } from "discourse/tests/helpers/qunit-helpers";