fix(desktop): macOS keyring 使用 keychain::Store 模块路径

[DeliciousBuding]

Summary

• apple-native-keyring-store 1.0.0 的 keychain feature 导出 keychain 模块而非顶层 Store，secure_store.rs 引用顶层 Store 导致 E0433，阻断 macOS DMG 构建
• 修复：apple_native_keyring_store::keychain::Store::new()（与 windows 分支的 Result<Arc<Self>> 签名一致）

Test plan

• 本地 cargo check 通过（Windows）
• API 签名与 crate 源码核对（keychain.rs:161 Store / 178 new / 212 CredentialStoreApi）
• CI 全绿
• rc 重跑时 build-desktop-macos 通过

Summary by CodeRabbit

• Bug Fixes
  • Improved credential store initialization on macOS for more reliable secure credential access.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 2a864163-1378-4331-a4c1-e31cd164731c

📥 Commits

Reviewing files that changed from the base of the PR and between 1c63be0 and d6495cb.

📒 Files selected for processing (1)

• app/desktop/src-tauri/src/secure_store.rs

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📝 Walkthrough

Walkthrough

The macOS credential store initialization now uses apple_native_keyring_store::keychain::Store. Windows and Linux initialization remain unchanged.

Changes

Credential store initialization

Layer / File(s)	Summary
Use the keychain Store constructor app/desktop/src-tauri/src/secure_store.rs	The macOS constructor changed to apple_native_keyring_store::keychain::Store::new().

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: copilot

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the desktop macOS keyring module path fix, which matches the main change.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/desktop-macos-keychain-store

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