docs: remove obsolete temporary README file

.memory/project.md

@@ -1,6 +1,6 @@
 # State
 - Core engine: `src/rpn-calculator.js`
-- Reference demo: `samples/calc-02/` (portrait-first HP48GX layout, compact mode/constants popups)
+- Reference demo: `samples/calc-02/` (portrait-first HP48GX layout, compact mode/constants popups; Const button comes before Mode in the display row)
 - Important UI behavior: mode button shows the current angle mode; keyboard focus stays on the hidden input on desktop; clipboard paste is supported
 - Public API: `push`, `pop`, `clear`, `swap`, `remove`, `edit`, `isValidIndex`, `input`, `command`, `getOperationsByCategory`, `getConstants`, `listConstants`, `setConstant`, `removeConstant`, `hasConstant`
 - Config: `maxSize`, `base`, `angleMode`, `enabledCommands`

.memory/state.md

@@ -1,9 +1,8 @@
 # State
 - Core engine: `src/rpn-calculator.js`
-- Active demo: `samples/calc-02/` portrait-only HP48GX layout; display-adjacent button row stays in 4 columns and now shares the same base button styling as the function keys
+- Default demo: `samples/dev/` classic browser demo; `samples/calc-02/` remains the portrait-first HP48GX-inspired reference
-- Mode button shows the current angle mode only; selecting a mode uses a popup menu
 - Public API: `push`, `pop`, `clear`, `swap`, `remove`, `edit`, `isValidIndex`, `input`, `command`, `getOperationsByCategory`, `getConstants`, `listConstants`, `setConstant`, `removeConstant`, `hasConstant`
 - Config: `maxSize`, `base`, `angleMode`, `enabledCommands`
-- Commands: arithmetic, stack, trigonometry, constants `pi`, `e`, `phi`, `g`, and `c`; arithmetic now includes `root` for y-th roots; constants can now be added or removed dynamically through the core API
+- Commands: arithmetic, stack, trigonometry, constants `pi`, `e`, `phi`, `g`, and `c`; arithmetic includes `root` with `y√x`, `yroot`, and `nroot` aliases; constants can be added or removed dynamically through the core API
-- Demo actions: keyboard focus is kept on the hidden input on desktop so typing keeps working; the keypad layout places Enter in the bottom-left, ± in the former Enter position, and Esc before Clear for safety; paste parses clipboard text as a number before pushing it to the stack; Ctrl+V is supported via the hidden input paste event; backspace is ignored when the stack is empty; operation errors are shown as an overlay bar on top of the calculator with a shorter timeout and darker red; the display button row uses a 4-column grid with a spacer cell to preserve alignment
+- Demo behavior: `samples/dev/` keeps hidden input focus on desktop and supports clipboard paste; `samples/calc-02/` uses compact mode/constants popups, a 4-column display-adjacent row, stack selection/move mode, and paste through the hidden input
 - Exports: browser `window.RpnCalculator`, CommonJS `module.exports`

README.md

@@ -1,15 +1,16 @@
 # RPN Virtual Calculator
 
-A browser-friendly RPN calculator built around a small, generic JavaScript API.
+A browser-friendly RPN calculator built around a small JavaScript API.
 
 ## Overview
 
 This project provides:
 
 - a reusable JavaScript RPN engine in `src/rpn-calculator.js`
-- browser demos in `samples/dev/` and `samples/calc-02/`
+- a classic browser demo in `samples/dev/`
-- a command system centralized in a single operation dictionary
+- a portrait-first HP48GX-inspired demo in `samples/calc-02/`
-- a small public API focused on stack operations and generic command dispatch
+- a centralized command system with aliases
+- a compact public API focused on stack operations, editing, and command dispatch
 
 The main class is `RpnCalculator`.
 
@@ -19,9 +20,6 @@ The main class is `RpnCalculator`.
 - `samples/dev/index.html`: browser demo entry point
 - `samples/dev/index.css`: demo styles
 - `samples/dev/index.js`: demo UI and keyboard logic
-- `samples/calc-01/index.html`: active browser demo entry point
-- `samples/calc-01/index.css`: demo styles
-- `samples/calc-01/index.js`: demo UI and keyboard logic
 - `samples/calc-02/index.html`: portrait-first HP48GX-style demo entry point
 - `samples/calc-02/index.css`: portrait-first demo styles
 - `samples/calc-02/index.js`: portrait-first HP48GX-style demo UI and keyboard logic
@@ -88,6 +86,9 @@ Available constants:
 
 - `pi`
 - `e`
+- `phi`
+- `g`
+- `c`
 - plus any user-defined constants added through the engine API
 
 They can be used through `command(...)`:
@@ -239,7 +240,7 @@ console.log(calc.pop()); // 0.5
 
 ## Demo
 
-The active demo lives in `samples/dev/`.
+The default demo lives in `samples/dev/`.
 
 Main UI features:
 
@@ -249,7 +250,7 @@ Main UI features:
 - angle mode selector for `deg`, `rad`, and `grad`
 - status pills for `inputValue` and `isEditing`
 - grouped panels for `Stack`, `Arithmetic`, `Trigonometry`, and `Constants`
-- error display area
+- keyboard-friendly hidden input on desktop
 
 ## Calc 02 demo
 

samples/calc-02/index.html

@@ -25,11 +25,11 @@
 
 			<div class="display-buttons-panel">
 				<div class="display-buttons-grid">
-					<button id="modeButton" class="display-button">Mode</button>
 					<button id="constButton" class="display-button">π</button>
-					<button id="upButton" class="display-button"><span class="display-button-symbol arrow-symbol">↑</span></button>
-					<div class="display-button-spacer"></div>
 					<button id="pasteButton" class="display-button"><span class="display-button-symbol paste-symbol">⎘</span></button>
+					<button id="upButton" class="display-button"><span class="display-button-symbol arrow-symbol">↑</span></button>
+					<button id="modeButton" class="display-button">Mode</button>
+					<div class="display-button-spacer"></div>
 					<button id="leftButton" class="display-button display-button-offset"><span class="display-button-symbol arrow-symbol">←</span></button>
 					<button id="downButton" class="display-button"><span class="display-button-symbol arrow-symbol">↓</span></button>
 					<button id="rightButton" class="display-button"><span class="display-button-symbol arrow-symbol">→</span></button>

samples/calc-02/visual-portrait.md

@@ -15,7 +15,7 @@
 
 ```
 ┌──────── Display Buttons ────────┐
-| Mode  | Paste  | Up    | Const  |
+| Const | Paste  | Up    | Mode   |
 |       | Left   | Down  | Right  |
 └─────────────────────────────────┘
 ```
@@ -23,30 +23,30 @@
 ## Keypad
 
 ```
-┌───────────── Keypad ──────────────┐
+┌──────────── Keypad ─────────────┐
 | +/- | Clear | Esc   | backspace |
 | 7   | 8     | 9     | /         |
 | 4   | 5     | 6     | *         |
 | 1   | 2     | 3     | -         |
 | 0   | .     | Enter | +         |
-└───────────────────────────────────┘
+└─────────────────────────────────┘
 ```
 
 ## Functions
 
 ```
-┌──────────── Functions ────────────┐
+┌──────────── Functions ──────────┐
 | x^2  | y^x   | 1/x   | %        |
 | √x   | y√x   | 10^x  |          |
 | log  | ln    |       |          |
-└───────────────────────────────────┘
+└─────────────────────────────────┘
 ```
 
 ## Trigo
 
 ```
-┌───────────── Trigo ───────────────┐
+┌──────────── Trigo ──────────────┐
 | sin  | cos   | tan   |          |
 | asin | acos  | atan  |          |
-└───────────────────────────────────┘
+└─────────────────────────────────┘
 ```