Fix/agent workspace layout

[charmi-reddy]

Summary

This PR improves the Agent Workspace action permission flow for better state consistency and safer UI behavior.

What Changed

• Stabilized action visibility tracking by using action IDs instead of list indexes.
• Kept local deny/feedback state aligned with refreshed action lists.
• Fixed pending-permission count updates using safe functional state updates.
• Added failure rollback so actions are visible again if permission update fails.
• Prevented duplicate permission submissions while a request is in progress.
• Normalized optional feedback before submit by trimming input and sending null when empty.
• Pruned stale hidden/submitting action IDs when actions refresh.

Why

These changes reduce UI desync issues during refreshes, prevent accidental duplicate approvals/denials, and make permission updates more reliable under slow/failing API responses.

Validation

• Verified frontend file has no lint/syntax errors after each change.
• Manually validated approve/deny flow behavior for:
  • success response
  • non-200 response
  • request failure
  • repeated fast clicks

Risk

Low to medium. Changes are scoped to Action Console interaction/state logic and do not alter backend APIs.