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

web_src/js/htmx.ts

@@ -1,5 +1,5 @@
 import {showErrorToast} from './modules/toast.ts';
-import 'idiomorph/dist/idiomorph-ext.js'; // https://github.com/bigskysoftware/idiomorph#htmx
+import 'idiomorph/htmx';
 import type {HtmxResponseInfo} from 'htmx.org';
 
 type HtmxEvent = Event & {detail: HtmxResponseInfo};