normaliseCal was using String.length/.slice() (UTF-16 code units), so
multi-byte characters like °, Ω, µ could slip through oversized. Now uses
TextEncoder to slice at 16 bytes, then repairs any incomplete trailing
UTF-8 sequence by walking back over continuation bytes to find the lead
byte and dropping the incomplete rune — exactly mirroring Go's
utf8.DecodeLastRuneInString loop and the C++ walk-back in
StreamHub::SetCalibrationEntry. Adds 4 new test cases covering the
non-ASCII/boundary scenarios, and corrects the canonical test command in
the task-6 report to 'cd Client/udpstreamer && node --test'.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Implements Calib JS module (calibration.js) with affine transform primitives,
CalTable, and normaliseCal matching Go CalConfig.Normalise semantics; 14 node
--test cases all pass. Loads before app.js in index.html.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
