test(bluesky): add comprehensive test suite

[ascorbic]

Summary

• Add comprehensive test suite for the bluesky loader with 42 passing tests
• Implement integration tests for authorFeedLoader functionality covering basic loading, incremental updates, pagination, and error handling
• Add schema validation tests for PostSchema including all embed types (images, external links, records), facets, replies, and author data
• Add rich text rendering tests for HTML output with proper escaping and link generation
• Configure Vitest testing environment with proper mocking of @atproto/api AtpAgent

Test Coverage

Integration Tests (9 tests)

• Basic loader functionality and configuration
• Multiple post handling
• Incremental loading with lastFetched metadata
• Pagination and limit parameter handling
• Filter parameter validation
• Network and parsing error handling

Schema Validation Tests (20 tests)

• Complete PostSchema validation for all required and optional fields
• Image embed validation with alt text and aspectRatio
• External link embed validation with metadata
• Record embed validation for quotes and reposts
• Facet validation for mentions, links, and hashtags
• Reply thread validation with parent and root references
• Author profile validation with all metadata

Rich Text Rendering Tests (13 tests)

• HTML escaping for safety
• Newline to <br> conversion
• Mention rendering with proper links
• Link rendering with display text
• Hashtag rendering with search links
• Combined facet rendering
• Full post HTML rendering integration

Test plan

• All 42 tests pass locally
• Package builds successfully with pnpm build
• Type checking passes with pnpm check
• Package validation passes with publint and @arethetypeswrong/cli

🤖 Generated with Claude Code

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Latest commit: 9676eda

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