fix(unified-search): add missing supportsActiveFilters calculation

The supportsActiveFilters variable was used but never defined, causing
the filtered/unfiltered results separation to fail silently.

Signed-off-by: nfebe <fenn25.fn@gmail.com>

Author: nfebe

core/src/components/UnifiedSearch/UnifiedSearchModal.vue

@@ -528,6 +528,10 @@ export default defineComponent({
 					}
 				})
 
+				const activeContentFilters = this.filters.filter(f => f.type === 'date' || f.type === 'person')
+				const supportedContentFilters = activeFilters.filter(f => f.type === 'date' || f.type === 'person')
+				const supportsActiveFilters = supportedContentFilters.length >= activeContentFilters.length
+
 				if (this.providerResultLimit > 5) {
 					params.limit = this.providerResultLimit
 					unifiedSearchLogger.debug('Limiting search to', params.limit)