fix: app cache and other issues (#5460)

* fixes

* #[serde(untagged)] my BEHATED (still kinda broken)

* remove unused hasContent ref

* clean up code in fetch instance

* ping 3 times for average latency

* fix: pinging to be more accurate

TCP_NODELAY — Set on the TCP stream right after connect, preventing Nagle's algorithm from buffering the small ping packet (could save up to ~40ms)

Instant over Utc::now() — Switched to monotonic std::time::Instant for timing, which is more precise and designed for measuring elapsed time (still using chrono just for the ping magic value)

* delete useFetch util and just use native fetch

* rename worlds until functions for more clarity

* fix lint

* fix cache.rs logic

* make backend ping use both impls

* Add optional timeout to server ping

* fix gallery appearing in nav with no items

* remove EU countries and add EU option for server country

* add uk to europe

---------

Co-authored-by: aecsocket <aecsocket@tutanota.com>

packages/ui/src/components/base/Combobox.vue

@@ -156,6 +156,7 @@ export interface ComboboxOption<T> {
 	href?: string
 	target?: string
 	action?: () => void
+	searchTerms?: string[]
 }
 
 const DROPDOWN_VIEWPORT_MARGIN = 8
@@ -272,7 +273,9 @@ const filteredOptions = computed(() => {
 	const query = searchQuery.value.toLowerCase()
 	return optionsWithKeys.value.filter((opt) => {
 		if (isDivider(opt)) return false
-		return opt.label.toLowerCase().includes(query)
+		if (opt.label.toLowerCase().includes(query)) return true
+		if (opt.searchTerms?.some((term) => term.toLowerCase().includes(query))) return true
+		return false
 	})
 })