- Add @typescript-eslint/parser and @typescript-eslint/eslint-plugin as
direct devDependencies (were only transitive, not linked in node_modules)
- Add files pattern and parserOptions.project to eslint.config.mjs so
ESLint finds and type-checks src/**/*.ts files correctly
- Run prettier --write to fix formatting across all src files
- Extract magic numbers into named constants (DHUHR_OFFSET_MINUTES,
ANGLE_MIN/MAX, LAT_SCALE) with source citations for MCW coefficients
- Add input validation (RangeError) for lat, lng, tz, elevation on all
public API functions (getTimes, getTimesAll)
- Optimize solar ephemeris: computeAngles() returns declination so
getTimes/getTimesAll reuse it for Asr instead of computing twice
- DRY: shared constants.ts for DEG, Dhuhr offset, angle bounds
- Improve MethodEntry type with labeled tuple elements and NaN docs
- Add stricter tsconfig (noImplicitReturns, noFallthroughCasesInSwitch)
- Switch tests to node:test framework (TAP output, describe/it blocks)
- Add 8 new input validation tests (104 ESM + 13 CJS total)
- Add ESLint + Prettier with CI lint job
- Remove src/ from npm package files (smaller published tarball)
- Document NaN return behavior in JSDoc for getTimes/getTimesAll
