fix(security): retry queued SSH input backpressure

[bifrost0x]

Summary

• retry an acknowledged single SSH input chunk when it was queued behind a large paste
• preserve the low-latency fire-and-forget path for normal, unqueued typing
• bump the SSH input asset cache version so deployed browsers receive the fix
• cover renewed backpressure on the queued single-chunk path with a regression test

Context

This follows up on #175 and addresses the post-merge review finding that a keystroke queued behind a rate-limited paste could be dropped if the token bucket was still empty.

Validation

• node --test tests/js/*.test.js — 35 passed
• python -m pytest -q tests/test_ssh_input.py — 6 passed
• python -m pytest -q tests/test_profile_launcher_ui.py tests/test_key_management_ui.py — 38 passed
• git diff --check

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-31T12:10:01.723168Z	0b72a8f	PR opened

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