feat: Add square and square root functions to calculator

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

calculator/calculator.app.js

@@ -51,6 +51,13 @@ var operators = {
   '=': {grid: [1, 2], globalGrid: [3, 4], trbl: '+==.'},
 };
 
+if (process.env.HWVERSION!=1) {
+  operatorsGrid = [2, 4];
+  operators['='].grid = [1, 3];
+  operators.r = {grid: [0, 2], val: '√'};
+  operators.s = {grid: [1, 2], val: 'x^2'};
+}
+
 var specialsGrid = [2, 2];
 var specials = {
   'R': {grid: [0, 0], globalGrid: [0, 0], trbl: 'RN7R', val: 'AC'},
@@ -314,6 +321,26 @@ function buttonPress(val) {
       }
       hasPressedNumber = false;
       break;
+    case 'r':
+      if (results != null) {
+        results = Math.sqrt(results);
+        displayOutput(results);
+      } else if (currNumber != null) {
+        currNumber = Math.sqrt(currNumber);
+        displayOutput(currNumber);
+      }
+      hasPressedNumber = false;
+      break;
+    case 's':
+      if (results != null) {
+        results = multiply(results, results);
+        displayOutput(results);
+      } else if (currNumber != null) {
+        currNumber = multiply(currNumber, currNumber);
+        displayOutput(currNumber);
+      }
+      hasPressedNumber = false;
+      break;
     case 'N':
       if (results != null) {
         displayOutput(results *= -1);