Fix current LDAP, diagnostics, and workspace feedback

[bifrost0x]

Summary

• add an optional TLS-verified LDAP backup endpoint with transport-only failover and safe authentication semantics
• fix Linux network diagnostics to read byte counters correctly for both short and predictable interface names
• localize the recent-connection just-now label in every supported locale
• align Command Sets and Command Library search/action geometry and focus behavior
• move the File Manager source-search focus ring to the complete compound control
• keep all six embedded SFTP actions on one row
• update cache versions, deployment examples, documentation, and regression coverage

Feedback reconciliation

This PR was prepared against current main after checking the previously merged work in #181, #182, and #185. It contains only the still-open follow-ups from:

• Recent Connections card shows time.justNow #187
• Network throughput graph in Diagnostics pane #188
• Small GUI enhancements v2 #174
• Add support for backup LDAP server #186

Verification

• Python suite: 2320 passed, 2 skipped; the four socket-dependent cases were rerun with local sockets enabled
• JavaScript unit suite: 35 passed
• Targeted Playwright suite: 33 passed
• ESLint for static JavaScript: passed
• vendored frontend asset check: passed
• Python compilation and git diff checks: passed

Fixes #187
Fixes #188

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-02T17:48:02.711166Z	8bf0fe5	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 8bf0fe5ec7

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