Backend
- api/peers.rs: list/add/remove + aggregate() that derives totals,
per-state counts, and tx/rx sums in one pass over the peer list
- poller.rs spawns a 3s tokio loop that emits peers://updated and
stats://updated; cancelled via abort() on stop_daemon
- DELETE peer URL-encodes the endpoint (the path includes ://) with
a small inline percent-encoder to avoid a url crate dep
- Tauri commands: peers_list, peer_add (with empty-string guard),
peer_remove, peers_stats
Frontend
- peers store subscribes to the two events and refreshes after
add/remove for immediate UI feedback
- Peers view renders endpoint, type, color-coded state badge, and
formatBytes-formatted rx/tx; the four stat cards re-use a
reusable Stat component
- AddPeerDialog uses radix-vue's Dialog primitive with regex
validation for tcp:// and quic:// schemes
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