fix(server): battery alerts when low, not when charged

[lollipopkit]

Fixes #1673

Summary

Changes

• Align server card readings and alerts: Keeps card readings in the same order as the detail page, avoids counting network speed twice when choosing the extra slot, and applies a low-charge alert only to discharging batteries. Tests cover slot selection, ordering, and battery status.

[winnowl]

Important

Review completed

Reviewed commit f9a1e02; the results are in the review on this pull request.

Merge risk: 🟢 Low · no blocking findings

📝 Walkthrough

• Align server card readings and alerts: Keeps card readings in the same order as the detail page, avoids counting network speed twice when choosing the extra slot, and applies a low-charge alert only to discharging batteries. Tests cover slot selection, ordering, and battery status.

• Review again

Commenting @winnowl review does the same.

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[winnowl]

Actionable comments posted: 0

✅ No blocking issues found — approving.

ℹ️ Review info

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Configuration: defaults

Review profile: balanced

Model: gpt-6-luna

📥 Commits

Reviewing files that changed between 20d11b3 and f9a1e02.

📒 Files selected for processing (2)

• lib/view/page/server/card/metric.dart
• test/unit/server/server_card_readings_test.dart

Coverage

• 1 of 1 areas reviewed