test: add test suites for 8 untested analyzers

[himerus]

Summary

8 analyzer files in packages/core/src/handlers/analyzers/ have zero test coverage:

1. api-surface.ts (91 lines)
2. type-coverage.ts (84 lines)
3. event-architecture.ts
4. css-architecture.ts
5. mixin-resolver.ts (440 lines — LARGE, complex mixin resolution logic)
6. slot-architecture.ts (253 lines)
7. naming-consistency.ts (380 lines — LARGE, library-wide pattern scoring)
8. source-accessibility.ts (368 lines — LARGE, has skipIf tests for real libs but no unit tests)

Create test files in tests...

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Created automatically by Automaker

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 96617511-62c0-4845-a8ad-18587f5ace4d

📥 Commits

Reviewing files that changed from the base of the PR and between 600373c and 19c25c4.

📒 Files selected for processing (8)

• tests/handlers/analyzers/api-surface.test.ts
• tests/handlers/analyzers/css-architecture.test.ts
• tests/handlers/analyzers/event-architecture.test.ts
• tests/handlers/analyzers/mixin-resolver.test.ts
• tests/handlers/analyzers/naming-consistency.test.ts
• tests/handlers/analyzers/slot-architecture.test.ts
• tests/handlers/analyzers/source-accessibility.test.ts
• tests/handlers/analyzers/type-coverage.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/test-add-test-suites-for-8-untested

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