release: prepare Agent Switch 0.3.0

[JNHFlow21]

Summary

• prepare Agent Switch 0.3.0 as the next alpha release
• synchronize CLI, package, native app, MCP server, README, and citation versions
• document the bilingual UI, safer repository metrics, Homebrew onboarding, and trust boundaries
• replace provider-shaped test secrets with unmistakably synthetic fixture values

Verification

• 79 unit tests passed
• integration reconcile test passed
• privacy scan passed
• source archive built
• universal macOS app built for arm64 and x86_64, ad-hoc signature verified
• Gitleaks/Open Source Launch strict audit: 0 errors, 0 warnings

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Check the replacement fixture values for leakage

After these fixtures stop using the sk-secret prefix, the assertion at the end of this test still checks only self.assertNotIn("sk-secret", combined). Consequently, leaking any of the new credential values into a reconciled client configuration or the doctor report would no longer fail this integration test. Check every replacement value (or retain a shared sentinel) so the test continues guarding against secret disclosure.

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