Implement Aegis SDK admin transaction preview

[El-swaggerito]

Description

Difficulty: Expert

Type: Feature

Summary

Implement transaction previews for admin actions.

Current Behaviour

Admin actions may be prepared without a clear preview of operation type, target, role, asset, compliance impact, and warnings.

Expected Behaviour

The SDK should provide typed previews for admin operations before signing.

Suggested Implementation

Create preview types, builders, warning mapping, tests, fixtures, and docs.

Files or Areas Likely Affected

• src/admin/
• src/transactions/
• src/types/
• src/errors/
• tests/
• docs/

Acceptance Criteria

• Admin transaction preview is implemented.
• Whitelist, minting, role, and asset actions are represented where applicable.
• Warnings are included for sensitive operations.
• Tests cover preview states.
• Docs explain preview usage.
• Dashboard usage guidance is included.

Additional Notes

This supports safer admin UX.

[Carlys17]

I'd like to work on this. I'll add typed admin transaction preview builders (operation type, target, role, asset,
compliance impact, warnings) for whitelist/minting/role/asset actions, with warning mapping, tests, fixtures, and docs.