Errors degrade UI performance

### ⚠️ Before submitting, please verify the following: ⚠️

- [x] This is a **bug**, not a question or a configuration issue.
- [x] This issue is **not** already reported on Github (I have searched for it).
- [x] Nextcloud Server and Desktop Client are **up to date**. See [Server Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) and [Desktop Releases](https://nextcloud.com/install/#install-clients) for supported versions.
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/)

### Bug description

I had a server error, that produced a couple hundred error messages. Those made the settings window unusable. I needed to delete the sync connection to be able to use the settings window again.

### Steps to reproduce

1. Generate hundreds of server errors, that are shown for a sync connection
2. Try to navigate the settings window

### Expected behavior

Number of errors shouldn't degrade UI performance

### Which files are affected by this bug

.

### Operating system

Windows

### Which version of the operating system you are running.

Windows 11

### Installation method

Official Windows MSI

### Nextcloud Server version

32.0.6

### Nextcloud Desktop Client version

33.0.7

### Did this occur after an update or on a clean installation?

Minor version update (i.e. 33.0.0 → 33.0.1)

### Are you using the Nextcloud Server Encryption module?

No

### Are you using an external user-backend?

- [x] Default internal user-backend
- [ ] LDAP or Active Directory
- [ ] SSO - SAML
- [ ] Other

### Nextcloud Server logs

```shell

```

### Additional info

Errors are already shown in the taskbar icon window and don't need to be duplicated in the settings window. Just show a message there, that errors exist and to check the taskbar icon window.

Reproduce the issue by generating hundreds of server errors for a sync connection, then navigate the settings window while observing the taskbar icon window. Trace how sync errors are collected and rendered in the settings UI; done means the settings window remains usable at high error counts and errors are not redundantly listed there.

Written by the indexing model from the issue text.