fix(worksheets): correct scaffolding summary to include all conditional modes

Bug: getScaffoldingSummary() only checked for 'always' or 'whenRegrouping',
missing 'whenMultipleRegroups' and 'when3PlusDigits' modes.

This caused configs with tenFrames: 'whenMultipleRegroups' to show
'no scaffolding' in the summary, even though ten-frames would appear
on problems with multiple regroups.

Fix: Changed from whitelist (=== 'always' || === 'whenRegrouping')
to blacklist (!== 'never') approach. Now correctly identifies any mode
that enables scaffolding, including all conditional modes.

Added comprehensive console logging to debug the issue:
- ConfigPanel.tsx: getScaffoldingSummary() logs each rule evaluation
- typstGenerator.ts: logs config mode and first problem display options
- displayRules.ts: logs rule resolution for each problem

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

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

apps/web/.claude/settings.local.json

@@ -171,7 +171,8 @@
       "Bash(npx biome lint:*)",
       "Bash(TZ=America/Chicago date:*)",
       "Bash(git hash-object:*)",
-      "Bash(git ls-tree:*)"
+      "Bash(git ls-tree:*)",
+      "Bash(git -C /Users/antialias/projects/soroban-abacus-flashcards show HEAD:apps/web/src/app/icon/route.tsx)"
     ],
     "deny": [],
     "ask": []

apps/web/src/app/create/worksheets/addition/components/ConfigPanel.tsx

@@ -41,19 +41,19 @@ function getScaffoldingSummary(displayRules: any): string {
   console.log('[getScaffoldingSummary] displayRules:', displayRules)
 
   const scaffoldingParts: string[] = []
-  if (displayRules.carryBoxes === 'always' || displayRules.carryBoxes === 'whenRegrouping') {
+  if (displayRules.carryBoxes !== 'never') {
     scaffoldingParts.push('carry boxes')
     console.log('[getScaffoldingSummary] Adding carry boxes:', displayRules.carryBoxes)
   }
-  if (displayRules.answerBoxes === 'always' || displayRules.answerBoxes === 'whenRegrouping') {
+  if (displayRules.answerBoxes !== 'never') {
     scaffoldingParts.push('answer boxes')
     console.log('[getScaffoldingSummary] Adding answer boxes:', displayRules.answerBoxes)
   }
-  if (displayRules.placeValueColors === 'always' || displayRules.placeValueColors === 'whenRegrouping') {
+  if (displayRules.placeValueColors !== 'never') {
     scaffoldingParts.push('place value colors')
     console.log('[getScaffoldingSummary] Adding place value colors:', displayRules.placeValueColors)
   }
-  if (displayRules.tenFrames === 'always' || displayRules.tenFrames === 'whenRegrouping') {
+  if (displayRules.tenFrames !== 'never') {
     scaffoldingParts.push('ten-frames')
     console.log('[getScaffoldingSummary] Adding ten-frames:', displayRules.tenFrames)
   }