fix: allow to close frozen light token accounts

[ananas-block]

Summary by CodeRabbit

• Bug Fixes
  • Frozen token accounts can now be successfully closed, aligning behavior with standard SPL Token operations.

[coderabbitai]

📝 Walkthrough

Walkthrough

This change modifies token account validation in the close processor by introducing a new internal parser that relaxes frozen state restrictions. The new from_account_info_mut_for_close function allows closing frozen token accounts while still enforcing ownership checks and rejecting uninitialized states, aligning with SPL Token behavior.

Changes

Cohort / File(s)	Summary
Close Processor State Validation programs/compressed-token/program/src/ctoken/close/processor.rs	Introduces from_account_info_mut_for_close internal parser replacing strict state validation. Allows closing frozen accounts while rejecting uninitialized state, maintaining ownership and data integrity checks. Updates lamport-distribution path to use the new parser.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• fix: CToken checked deserialization #1995 — Relates to CToken zero-copy deserialization and account-state validation, though takes opposite direction by enforcing stricter Initialized checks versus this PR's relaxation for frozen account closure.

Suggested labels

ai-review

Suggested reviewers

• sergeytimoshin
• SwenSchaeferjohann

Poem

❄️ A frozen token's prison door swings wide,
State validation bends with careful pride,
No longer banned from closing their account,
SPL's blessing, aligned and profound! 🔐✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: allowing frozen token accounts to be closed, which aligns with the core modification in the PR.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 70.00%.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch jorrit/fix-allow-to-close-frozen-token-accounts

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