v0.2.0 - Structured Guidance Knowledge Base

Highlights

• Added a structured guidance knowledge database for Zi Wei Dou Shu analysis.
• Added local retrieval and prompt-context builders to ground AI output without adding backend dependencies.
• Integrated guidance retrieval into natal interpretation, yearly fortune, match analysis, and life K-line generation.
• Removed legacy Markdown knowledge files that were no longer suitable as runtime guidance.
• Added Vitest regression coverage for retrieval and prompt context behavior.

Verification

• npm test passed: 2 test files, 18 tests.
• npm run build passed. Vite still reports the existing large chunk warning.
• npm run lint passed.