Project rules — RPN Virtual Calculator

Build a browser-friendly RPN calculator as a JavaScript class, preferably in a single file.
Keep code names, categories, and API identifiers in English.
Use only read-only / generic public API methods: push, pop, clear, swap(index1, index2), remove(index), edit(index), isValidIndex(index), input(command), and command(name, ...args).
Expose inputValue as a string and isEditing as a boolean.
Constructor options:
- maxSize (default 2048)
- base (default 10)
- angleMode (deg default; also rad and grad)
- enabledCommands
Available constants: pi, e.
Supported operations must be centralized in one dictionary containing at least:
- argCount
- category
- aliases
Allowed categories are limited to: Stack, Arithmetic, and Trigonometry.

Supported commands

Current commands:
- add, sub, mul, div, mod, pow, sqr, neg, sqrt, recip, sin, cos, tan, asin, acos, atan, log, ln, dup, drop, swap, clear, enter
Aliases:
- +, -, *, /, %, ^, y^x, 1/x

mod is the percentage operator: a b % => (a * b) / 100
sqrt, asin, acos, log, and ln must throw clear, explicit domain errors
log uses Math.log10
ln uses Math.log
Trigonometric functions use degrees in the demo:
- sin, cos, tan convert degrees to radians
- inverse trig functions return degrees
inputValue must remain a string to preserve future hexadecimal input support
The example HTML must group buttons by Stack, Arithmetic, and Trigonometry
The example HTML must call command(...) for actions

Keep this file updated after each project change using the provided editing tools.