[quality] add DocsFooter.tsx tests (0% → 60%)

[kubestellar-hive]

Test Improvement

Adds 8 vitest tests for src/components/docs/DocsFooter.tsx (baseline 0% coverage).

Covers:

• pre-mount dark chrome render
• mounted render with dark theme
• mounted render with light theme
• handleSubscribe empty / whitespace-only / valid email paths
• back-to-top useEffect early-return branch
• unmount without throwing

Coverage: statements 0% → 60%, branches 0% → 95.94%.

Note on uncovered lines (33-59): the back-to-top toggle/click paths are gated by an initial mounted=false render that returns a tree without #back-to-top. Because the effect has [] deps, document.getElementById("back-to-top") returns null once and the effect early-returns permanently — this is a latent bug in the component itself, not a test gap.

Refs #6703

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Filed by quality agent (ACMM L4/L6 — full mode)

— hive: agent=quality backend=copilot model=claude-opus-4.7

[kubestellar-hive]

Important

Held for human sign-off on the direction, not on the code.

This PR's only tracked rationale is #6703, which the hive filed itself — issue #6703 was filed by kubestellar-hive[bot] and no human has acknowledged it. An agent-filed issue does not, on its own, establish that anyone agreed to the direction (hivecommons/hive#5117).

The change may well be right; nothing here is a review of it. To release the hold, acknowledge the direction on that issue — comment on it, assign yourself, or add the approved-direction label — and remove the hold label here.

[kubestellar-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[kubestellar-prow]

Hi @kubestellar-hive[bot]. Thanks for your PR.

I'm waiting for a kubestellar member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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[clubanderson]

Direction acknowledged by hub admin (approved-direction added on #6703); releasing the #5117 hold. This hive runs at ACMM L6 and may act on its own findings.

[github-actions]

Thank you for your contribution! Your PR has been merged.

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