Update to eslint 10 (#36925)

- Enable a few more rules, fix issues. The 2 `value` issues are
false-positives.
- Add exact types for `window.pageData` and
`window.notificationSettings`.
- peerDependencyRules for eslint-plugin-github unrestricted, the plugin
works in v10, but does not declare compatibility, pending
https://github.com/github/eslint-plugin-github/issues/680.
- Added
[eslint-plugin-de-morgan](https://github.com/azat-io/eslint-plugin-de-morgan),
no violations.

---------

Signed-off-by: silverwind <me@silverwind.io>
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Claude (Opus 4.6) <noreply@anthropic.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

web_src/js/features/common-fetch-action.ts

@@ -99,7 +99,7 @@ export async function submitFormFetchAction(formEl: HTMLFormElement, opts: Submi
   if (formMethod.toLowerCase() === 'get') {
     const params = new URLSearchParams();
     for (const [key, value] of formData) {
-      params.append(key, value.toString());
+      params.append(key, value as string);
     }
     const pos = reqUrl.indexOf('?');
     if (pos !== -1) {