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