feat(models): show Civitai model/version ids in model modal, always-on hash/id search

- Model modal hash footnote now shows Civitai model id and version id
  (right-aligned, quick-copy buttons); hidden for non-Civitai models
- Hash/id exact search (sha256/autov2/autov3/civitai ids) is now always
  on: the search-options "hash" toggle is removed and the search_hash
  query param is silently ignored for API compatibility
- Footnote render condition relaxed so autov3-only and id-only models
  still show the line
- i18n: 4 new keys translated in all 9 locales; filters.hash key removed

static/js/api/baseModelApi.js

@@ -1566,9 +1566,6 @@ export class BaseModelApiClient {
                 if (pageState.searchOptions.creator !== undefined) {
                     params.append('search_creator', pageState.searchOptions.creator.toString());
                 }
-                if (pageState.searchOptions.hash !== undefined) {
-                    params.append('search_hash', pageState.searchOptions.hash.toString());
-                }
             }
         }