Auto-review follow-ups for PR #233: feat(extension): dial configured remote bridges alongside loopback

[github-actions]

Tracking auto-review follow-ups for #233 (verdict: warn).

🟡 Nits

• server-hello.ts: a rejected hello keeps the mcpId→link binding it created, so a refused id is held until the link drops and a hello flood grows mcpLink unboundedly
• session-scope.ts: clearAllSessionScopes has no production caller after per-link teardown, and its doc comment still claims it is called on WS teardown
• socket.ts/popup.ts: the connection badge stays green whenever any link is open, and bridge rows carry no connected bit, so a dead loopback link is invisible

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When addressing the review on #233, resolve each item and add Closes #<this issue> to the PR once everything is genuinely fixed; deferred items stay open here. See the auto-review follow-up convention in CLAUDE.md.

[chrischall]

Ticking these after the fact: all three landed in #236 (refused-hello unbind, the dead clearAllSessionScopes removed, per-link status dots), each with a test, and the Closes #234 in that PR closed this issue before I checked the boxes. The record said "closed, nothing done", which is the wrong half of the convention to get wrong.