SV UI: warn voters when locked config fields are altered (#5650)

[puneetfinoa]

Summary

• Warn on proposal details when a CRARC_SetConfig / SRARC_SetConfig proposal changes UI-disabled (locked) fields — the emergency/API path from #5650.
• Highlight those changed rows in the proposed-changes list.
• Wrap long pending/current config values in the create form so synchronizer IDs do not overflow the field column.
• Create-UI locking for existing synchronizer fields was already in place; no backend lock API in this change.

Fixes #5650

Test plan

• Unit: proposal-details-content.test.tsx — warning on/off (amulet + DSO)
• Unit: pending-fields.test.tsx still passes after wrap fix
• Manual: create emergency SetConfig via API, confirm warning + highlight in UI
• Manual: normal editable-only SetConfig proposal has no warning
• Manual: locked fields still not editable in create form
• Screenshot attached for frontend review

Pull Request Checklist

Cluster Testing

• If a cluster test is required, comment /cluster_test on this PR to request it, and ping someone with access to the DA-internal system to approve it.
• If an upgrade test is required, comment /upgrade_test on this PR to request it, and ping someone with access to the DA-internal system to approve it.
• If a hard-migration test is required (from the latest release), comment /hdm_test on this PR to request it, and ping someone with access to the DA-internal system to approve it.
• If a logical synchronizer upgrade test is required (from canton-3.5), comment /lsu_test on this PR to request it, and ping someone with access to the DA-internal system to approve it.

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