mtm-rpn-js/.memory/project.md

Project memory

• RPN calculator JS project.
• Read .memory/state.md for current state.
• Keep names and commands in English.
• Update memory files based on events: engine, demo, API, commands, exports, docs, or tasks.
• Core arithmetic now includes root for y-th roots, and samples/calc-02/ uses it for y√x.
• samples/calc-02/ in portrait mode remains the active responsive demo.