Filter for HarmonyOS

coffeepotprotocol wrote:

> There is currently a filter for Windows Phone, but not for **HarmonyOS** (~5% global, ~19% market share in China, third largest smartphone operating system worldwide as of [wikipedia](https://en.wikipedia.org/wiki/HarmonyOS#Market_share))
>
> OSM apps that I'm aware of in the HarmonyOS AppGallery :
>
> - OsmAnd https://appgallery.huawei.com/#/app/C101486545
> - Organic Maps https://appgallery.huawei.com/#/app/C104325611
> - MapFactor https://appgallery.huawei.com/#/app/C100876765
> - Naviki https://appgallery.huawei.com/#/app/C100311717
> - komoot https://appgallery.huawei.com/#/app/C103465387
> - Guru Maps https://appgallery.huawei.com/#/app/C110262549
> - Mapy.cz https://appgallery.huawei.com/#/app/C101957275
> - Every Door https://appgallery.huawei.com/#/app/C109364057
>
> Great work to far, thanks :-)

### Problem to solve

Since October 2024, Android and HarmonyOS have no longer been compatible. That is why a separate filter is required for this.

### Proposal

- [ ] Add a filter for HarmonyOS.
- [ ] Every App that has a documented appgallery.huawei.com Id should be shown when it is active.

### Links / references / screenshots

Start by locating the existing Windows Phone filter and tracing how app platforms and active appgallery.huawei.com IDs are represented. Add HarmonyOS as a separate filter, ensure apps with documented AppGallery IDs appear when active, and verify both proposal checklist items in the catalog.

Written by the indexing model from the issue text.