- Add interface field display in initial context: interface User { id: string, name: string }
- Add type alias definition display: type UserId = string
- Support readonly fields, extends, union/intersection types
- Add definition field to TypeAliasInfo in FileAST
- Update ASTParser to extract type alias definitions
- Add formatInterfaceSignature() and formatTypeAliasSignature() helpers
- Truncate long type definitions at 80 characters
- Translate ROADMAP.md from Russian to English
- Add 18 new tests for interface fields and type aliases
- Add full function signatures with parameter types and return types
- Arrow functions now extract returnType in ASTParser
- New formatFunctionSignature() helper in prompts.ts
- Add includeSignatures config option (default: true)
- Support compact format when includeSignatures: false
- 15 new tests, coverage 91.14% branches
