frontend: Stop NetworkSpeedTest reconnect interval multiply

[joaoantoniocardoso]

Summary

• Keep a single 200ms ping interval for the page lifetime.
• On disconnect, only recreate the WebSocket (do not nest another setInterval).

Test plan

• Open Tools → Network test, leave the page open with a flaky WS: interval count stays at one
• Latency updates while connected; reconnect recovers without runaway timers
• Leave the page: interval cleared, socket closed

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Supersedes #4032 (recreated from fork joaoantoniocardoso/BlueOS-docker instead of same-repo head).

[github-actions]

Automated PR Review

0. Summary

• Verdict: LGTM

Fixes a compounding-interval bug in NetworkSpeedTest.vue: the previous openWebSocket() both created a WebSocket and installed a 200 ms setInterval, and when that interval detected a closed socket it re-called openWebSocket() — nesting another interval on every reconnect. The PR moves the single setInterval into mounted(), renames the socket-only helper to connectWebSocket() (which now closes any prior socket first), and adds an early return after reconnect so a send isn't attempted on the freshly-created (still CONNECTING) socket. Existing beforeDestroy() cleanup remains valid.

No further comments, nice job 👍

Generated by PR Review Bot. This is advisory, a human reviewer must still approve.