fix: prepare MiniMax accounting for v4.9.0

[slkiser]

Summary

• Preserve MiniMax overage through cache, export, and all four displays.
• Correct endpoint authority.
• Restore public MiniMax types.
• Update audited transitive dependencies.

Validation

• pnpm verify: 185 files, 2,216 passed, 1 skipped.
• Package verification passed.
• High-level audit clear.
• Independent review approved.