test: add auction double closure regression

[David-patrick-chuks]

Overview

This PR verifies the auction double-finalization guard in close_auction and adds regression coverage to ensure an auction cannot be closed more than once. The new test exercises a successful auction close followed by a second close attempt, which must be rejected.

Related Issue

Closes #212

Changes

⚙️ Auction Finalization Guard

• [VERIFY] contract/contracts/ticket_payment/src/contract.rs
  • Confirmed close_auction checks is_auction_closed before finalizing the auction.
  • Confirmed a second closure attempt returns TicketPaymentError::AuctionEnded.

🧪 Unit Tests

• [MODIFY] contract/contracts/ticket_payment/src/test.rs
  • Added test_close_auction_rejects_double_closure.
  • Covers a real auction flow: place bid, close auction successfully once, then reject a second close attempt.
  • Verifies the first payment remains confirmed and no second payment record is created.

Verification Results

Acceptance Criteria	Status
close_auction prevents double finalization	✅
Double closure attempt is covered by unit tests	✅
Local cargo test passes	✅
Local cargo clippy --all-targets --all-features -- -D warnings passes	✅

How to Test

# 1. Confirm you're on the branch
git branch --show-current

# 2. Run the full contract test suite
cd contract
cargo test
<img width="596" height="351" alt="image" src="https://github.com/user-attachments/assets/73de3e9e-474f-4ed9-9914-9ec05f1dca0c" />

# 3. Run clippy with warnings denied
cargo clippy --all-targets --all-features -- -D warnings
<img width="574" height="65" alt="image" src="https://github.com/user-attachments/assets/ea41140b-5b0c-4c59-a3cd-3166d84dad30" />

# 4. Optional: inspect the relevant test change
git diff -- contract/contracts/ticket_payment/src/test.rs

[vercel]

@David-patrick-chuks is attempting to deploy a commit to the oseh-svg's projects Team on Vercel.

A member of the Team first needs to authorize it.

[drips-wave]

@David-patrick-chuks Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

[Yunusabdul38]

@David-patrick-chuks fix ci error

[David-patrick-chuks]

@Yunusabdul38 FIXED