feat: add logging to authentication flows

[ryanbonial]

Description

Added comprehensive logging to the authentication flow to improve debugging and traceability. The changes include detailed log messages at key points in the authentication process, such as initialization, token exchange, login/logout operations, and token refreshing.

What to review

• Review the logger implementation in the auth store initialization
• Check the logging points throughout the authentication flow
• Verify appropriate log levels (debug, info, warn, error) are used for different scenarios
• Review the test mocks for the logger to ensure tests run cleanly

Testing

Added logger mocks to all relevant test files to prevent actual logging during tests. The existing test coverage remains intact, with additional mocks to support the new logging functionality.

Fun gif

[vercel]

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Project	Deployment	Actions	Updated (UTC)
sdk-docs	Ready	Preview, Comment	Jan 30, 2026 3:58pm
sdk-kitchensink-react	Ready	Preview, Comment	Jan 30, 2026 3:58pm

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🟢	Lines	95% (🎯 95%)	7834 / 8246
🟢	Statements	95% (🎯 95%)	7834 / 8246
🟢	Functions	96.23% (🎯 95%)	383 / 398
🟢	Branches	92.88% (🎯 90%)	2299 / 2475

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/core/src/auth/authStore.ts	85.65%	90.76%	100%	85.65%	134-135, 278-280, 286, 293-294, 383-417
packages/core/src/auth/handleAuthCallback.ts	97.7%	88.23%	100%	97.7%	73-74
packages/core/src/auth/logout.ts	100%	92.85%	100%	100%
packages/core/src/auth/refreshStampedToken.ts	59.18%	97.43%	84.61%	59.18%	84-139, 181-201, 206-233, 241-242, 256, 276-285, 300
packages/core/src/auth/subscribeToStateAndFetchCurrentUser.ts	98.55%	94.11%	100%	98.55%	69

Generated in workflow #2838 for commit bd0103d by the Vitest Coverage Report Action