fix(worksheets): correct Typst array membership syntax for ten-frames rendering

Fix ten-frames not rendering on worksheets when scaffolding rules called for them.

The issue was in the Typst template code using incorrect syntax for checking
array membership. Typst requires `.contains(item)` method, not `(item in array)`.

Changes:
- typstHelpers.ts:203: Change `(i in regrouping-places)` to `regrouping-places.contains(i)`
- answerRow.ts:52: Change `(i in borrow-places)` to `borrow-places.contains(i)`

This was causing `shows-frame` to evaluate incorrectly, preventing ten-frames
from rendering even when displayRules.tenFrames was set to 'whenRegrouping'
and the problem had actual regrouping.

Affects both addition and subtraction worksheets.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/create/worksheets/addition/typstHelpers.ts

@@ -5,16 +5,16 @@
 // for backward compatibility. New code should import from typstHelpers/ directly.
 
 // Import types for internal use
-import type { DisplayOptions } from "./typstHelpers/shared/types";
+import type { DisplayOptions } from './typstHelpers/shared/types'
 
 // Re-export everything from modular structure
 export type {
   DisplayOptions,
   CellDimensions,
-} from "./typstHelpers/shared/types";
-export { generateTypstHelpers } from "./typstHelpers/shared/helpers";
-export { generatePlaceValueColors } from "./typstHelpers/shared/colors";
-export { generateSubtractionProblemStackFunction } from "./typstHelpers/subtraction/problemStack";
+} from './typstHelpers/shared/types'
+export { generateTypstHelpers } from './typstHelpers/shared/helpers'
+export { generatePlaceValueColors } from './typstHelpers/shared/colors'
+export { generateSubtractionProblemStackFunction } from './typstHelpers/subtraction/problemStack'
 
 /**
  * Generate Typst function for rendering problem stack/grid
@@ -24,23 +24,20 @@ export { generateSubtractionProblemStackFunction } from "./typstHelpers/subtract
  * @param cellSize Size of each digit cell in inches
  * @param maxDigits Maximum number of digits in any problem on this page (1-6)
  */
-export function generateProblemStackFunction(
-  cellSize: number,
-  maxDigits: number = 3,
-): string {
-  const cellSizeIn = `${cellSize}in`;
-  const cellSizePt = cellSize * 72;
+export function generateProblemStackFunction(cellSize: number, maxDigits: number = 3): string {
+  const cellSizeIn = `${cellSize}in`
+  const cellSizePt = cellSize * 72
 
   // Generate place value color assignments (unique color per place value)
   // Index 0 = ones, 1 = tens, 2 = hundreds, 3 = thousands, 4 = ten-thousands, 5 = hundred-thousands
   const placeColors = [
-    "color-ones", // 0: ones (light blue)
-    "color-tens", // 1: tens (light green)
-    "color-hundreds", // 2: hundreds (light yellow)
-    "color-thousands", // 3: thousands (light pink/rose)
-    "color-ten-thousands", // 4: ten-thousands (light purple/lavender)
-    "color-hundred-thousands", // 5: hundred-thousands (light peach/orange)
-  ];
+    'color-ones', // 0: ones (light blue)
+    'color-tens', // 1: tens (light green)
+    'color-hundreds', // 2: hundreds (light yellow)
+    'color-thousands', // 3: thousands (light pink/rose)
+    'color-ten-thousands', // 4: ten-thousands (light purple/lavender)
+    'color-hundred-thousands', // 5: hundred-thousands (light peach/orange)
+  ]
 
   return String.raw`
 // Problem rendering function for addition worksheets (supports 1-${maxDigits} digit problems)
@@ -48,7 +45,7 @@ export function generateProblemStackFunction(
 // Per-problem display flags: show-carries, show-answers, show-colors, show-ten-frames, show-numbers
 #let problem-stack(a, b, index-or-none, show-carries, show-answers, show-colors, show-ten-frames, show-numbers) = {
   // Place value colors array for dynamic lookup (index 0 = ones, 1 = tens, ...)
-  let place-colors = (${placeColors.join(", ")})
+  let place-colors = (${placeColors.join(', ')})
 
   // Extract digits dynamically based on problem size
   let max-digits = ${maxDigits}
@@ -203,7 +200,7 @@ export function generateProblemStackFunction(
             [],  // Empty cell for + sign column
             // Show ten-frames for any place value that needs regrouping
             ..for i in range(0, actual-digits).rev() {
-              let shows-frame = show-ten-frames-for-all or (i in regrouping-places)
+              let shows-frame = show-ten-frames-for-all or regrouping-places.contains(i)
               if shows-frame {
                 // Show ten-frame for this place value
                 // Top frame: carry destination (next higher place value)
@@ -246,7 +243,7 @@ export function generateProblemStackFunction(
     )
   )
 }
-`;
+`
 }
 
 /**
@@ -274,10 +271,10 @@ export function generateProblemTypst(
   addend2: number,
   cellSize: number,
   options: DisplayOptions,
-  problemNumber?: number,
+  problemNumber?: number
 ): string {
-  const cellSizeIn = `${cellSize}in`;
-  const cellSizePt = cellSize * 72;
+  const cellSizeIn = `${cellSize}in`
+  const cellSizePt = cellSize * 72
 
   return String.raw`
 #let a = ${addend1}
@@ -299,7 +296,7 @@ export function generateProblemTypst(
       #text(size: ${(cellSizePt * 0.6).toFixed(1)}pt, weight: "bold", font: "New Computer Modern Math")[\\#${problemNumber}.]
     ]
   ],`
-      : ""
+      : ''
   }
   grid(
     columns: (0.5em, ${cellSizeIn}, ${cellSizeIn}, ${cellSizeIn}),
@@ -310,41 +307,31 @@ export function generateProblemTypst(
     ${
       options.showCarryBoxes
         ? options.showPlaceValueColors
-          ? "diagonal-split-box(" +
-            cellSizeIn +
-            ", color-tens, color-hundreds),"
-          : "box(width: " +
-            cellSizeIn +
-            ", height: " +
-            cellSizeIn +
-            ", stroke: 0.5pt)[],"
-        : "v(" + cellSizeIn + "),"
+          ? 'diagonal-split-box(' + cellSizeIn + ', color-tens, color-hundreds),'
+          : 'box(width: ' + cellSizeIn + ', height: ' + cellSizeIn + ', stroke: 0.5pt)[],'
+        : 'v(' + cellSizeIn + '),'
     }
     // Tens carry box: shows carry FROM ones (blue) TO tens (green)
     ${
       options.showCarryBoxes
         ? options.showPlaceValueColors
-          ? "diagonal-split-box(" + cellSizeIn + ", color-ones, color-tens),"
-          : "box(width: " +
-            cellSizeIn +
-            ", height: " +
-            cellSizeIn +
-            ", stroke: 0.5pt)[],"
-        : "v(" + cellSizeIn + "),"
+          ? 'diagonal-split-box(' + cellSizeIn + ', color-ones, color-tens),'
+          : 'box(width: ' + cellSizeIn + ', height: ' + cellSizeIn + ', stroke: 0.5pt)[],'
+        : 'v(' + cellSizeIn + '),'
     }
     [],
 
     // First addend
     [],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-hundreds" : "color-none"})[#align(center + horizon)[#if aH > 0 [#aH] else [#h(0pt)]]],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-tens" : "color-none"})[#align(center + horizon)[#aT]],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-ones" : "color-none"})[#align(center + horizon)[#aO]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-hundreds' : 'color-none'})[#align(center + horizon)[#if aH > 0 [#aH] else [#h(0pt)]]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-tens' : 'color-none'})[#align(center + horizon)[#aT]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-ones' : 'color-none'})[#align(center + horizon)[#aO]],
 
     // Second addend with + sign
     [+],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-hundreds" : "color-none"})[#align(center + horizon)[#if bH > 0 [#bH] else [#h(0pt)]]],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-tens" : "color-none"})[#align(center + horizon)[#bT]],
-    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? "color-ones" : "color-none"})[#align(center + horizon)[#bO]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-hundreds' : 'color-none'})[#align(center + horizon)[#if bH > 0 [#bH] else [#h(0pt)]]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-tens' : 'color-none'})[#align(center + horizon)[#bT]],
+    box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: ${options.showPlaceValueColors ? 'color-ones' : 'color-none'})[#align(center + horizon)[#bO]],
 
     // Horizontal line
     [],
@@ -359,7 +346,7 @@ export function generateProblemTypst(
     box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: color-none, stroke: grid-stroke, inset: 0pt)[],
     box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: color-none, stroke: grid-stroke, inset: 0pt)[],
     box(width: ${cellSizeIn}, height: ${cellSizeIn}, fill: color-none, stroke: grid-stroke, inset: 0pt)[],`
-        : ""
+        : ''
     }
   )${
     options.showTenFrames || options.showTenFramesForAll
@@ -368,8 +355,8 @@ export function generateProblemTypst(
   box(inset: 2pt)[
     #ten-frames-stacked(${cellSizeIn}, color-ones, color-tens)
   ]`
-      : ""
+      : ''
   }
 )
-`;
+`
 }

apps/web/src/app/create/worksheets/addition/typstHelpers/subtraction/answerRow.ts

@@ -1,8 +1,8 @@
 // Answer row and ten-frames rendering for subtraction problems
 // Shows answer boxes and optional borrowing visualization
 
-import type { CellDimensions } from "../shared/types";
-import { TYPST_CONSTANTS } from "../shared/types";
+import type { CellDimensions } from '../shared/types'
+import { TYPST_CONSTANTS } from '../shared/types'
 
 /**
  * Generate Typst code for the line row (separates problem from answer)
@@ -11,7 +11,7 @@ import { TYPST_CONSTANTS } from "../shared/types";
  * @returns Typst code for line row
  */
 export function generateLineRow(cellDimensions: CellDimensions): string {
-  const { cellSizeIn } = cellDimensions;
+  const { cellSizeIn } = cellDimensions
 
   return String.raw`
       // Line row
@@ -19,7 +19,7 @@ export function generateLineRow(cellDimensions: CellDimensions): string {
       ..for i in range(0, grid-digits) {
         (line(length: ${cellSizeIn}, stroke: heavy-stroke),)
       },
-`;
+`
 }
 
 /**
@@ -32,7 +32,7 @@ export function generateLineRow(cellDimensions: CellDimensions): string {
  * @returns Typst code for ten-frames row
  */
 export function generateTenFramesRow(cellDimensions: CellDimensions): string {
-  const { cellSizeIn } = cellDimensions;
+  const { cellSizeIn } = cellDimensions
 
   return String.raw`
       // Ten-frames row (show borrowing visualization)
@@ -49,7 +49,7 @@ export function generateTenFramesRow(cellDimensions: CellDimensions): string {
           (
             [],  // Empty cell for operator column
             ..for i in range(0, grid-digits).rev() {
-              let shows-frame = show-ten-frames-for-all or (i in borrow-places)
+              let shows-frame = show-ten-frames-for-all or borrow-places.contains(i)
 
               if shows-frame {
                 // Show borrowed amount visualization
@@ -77,7 +77,7 @@ export function generateTenFramesRow(cellDimensions: CellDimensions): string {
       } else {
         ()
       },
-`;
+`
 }
 
 /**
@@ -90,7 +90,7 @@ export function generateTenFramesRow(cellDimensions: CellDimensions): string {
  * @returns Typst code for answer boxes row
  */
 export function generateAnswerBoxesRow(cellDimensions: CellDimensions): string {
-  const { cellSizeIn } = cellDimensions;
+  const { cellSizeIn } = cellDimensions
 
   return String.raw`
       // Answer boxes (only for actual difference digits, hiding leading zeros)
@@ -111,5 +111,5 @@ export function generateAnswerBoxesRow(cellDimensions: CellDimensions): string {
           ],)
         }
       },
-`;
+`
 }