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feat: add server ping display with peer ping foundation

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Adds application-level ping/pong between extension and relay server.
Extension sends PING every 15s, server echoes PONG. Round-trip time
displayed in Status tab (green/yellow/red color-coded).

Server also forwards PING with target peerId and routes PONG back,
enabling future peer-to-peer ping without server restart.
Extension already responds to incoming peer PINGs.

See CHANGELOG.md for details.
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KoalaDev
2026-06-09 07:08:14 +02:00
parent 6c6d4dc2a2
commit 3e7afd7592
7 changed files with 151 additions and 5 deletions
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docs/CHANGELOG.md
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@@ -4,6 +4,14 @@ All notable changes to the KoalaSync browser extension and relay server.
---
## [v2.2.1] — 2026-06-09
### Added
- **Server Ping Display**: Measures round-trip latency to the relay server via application-level ping/pong events. The extension sends `PING { t }` every 15 seconds; the server responds with `PONG { t }`. Round-trip time is calculated client-side and displayed in the Status tab, color-coded (<50ms green, 50–150ms yellow, >150ms red). No ping value is shown when disconnected or if the server does not respond within 5 seconds.
- **Peer Ping Response (Future-Proof)**: The extension can now respond to incoming `PING { t, sender }` events from other peers by sending back `PONG { t, target: sender }`. The relay server forwards `PING` to the target peer and routes `PONG` back to the original sender. Both client and server validate that peers are in the same room before forwarding/routing. Peer-to-peer ping initiation will be activated in a future extension update without requiring a server restart.
---
## [v2.2.0] — 2026-06-08
### Added