Update JS and PY deps, misc tweaks (#33903)

- Update all updateable dependencies
- Add a few more unupgradable ones to updates blocklist
- Adapt to breaking changes
- Update to typescript 5.8, enable `erasableSyntaxOnly` which
necessitated a change because of forbidden syntax
- Misc cleanups
- Tested htmx, easymde, swagger, chart.js

.eslintrc.cjs

@@ -104,7 +104,7 @@ module.exports = {
         '@vitest/no-disabled-tests': [0],
         '@vitest/no-done-callback': [0],
         '@vitest/no-duplicate-hooks': [0],
-        '@vitest/no-focused-tests': [0],
+        '@vitest/no-focused-tests': [2],
         '@vitest/no-hooks': [0],
         '@vitest/no-identical-title': [2],
         '@vitest/no-interpolation-in-snapshots': [0],
@@ -155,7 +155,7 @@ module.exports = {
         'eslint-plugin-vue-scoped-css',
       ],
       extends: [
-        'plugin:vue/vue3-recommended',
+        'plugin:vue/recommended',
         'plugin:vue-scoped-css/vue3-recommended',
       ],
       rules: {