fix: cache results.length before explosion loop to prevent double-count

Pushing explosion dice to DieTerm.results made the for loop
condition (j < results.length) grow mid-iteration, re-processing
the explosion result as a normal die. This produced spurious
entries like `1D6 → 4` alongside the correct `1D6-1 → 3`.

Fixes prompt() (for loop) and rollSpellDamageToMessage()
(for...of) by caching result count / snapshotting the array
before iterating.

module/documents/roll.mjs

@@ -616,8 +616,10 @@ export default class LethalFantasyRoll extends Roll {
 
     let singleDice = `1D${maxValue}`
     for (let i = 0; i < rollBase.dice.length; i++) {
-      for (let j = 0; j < rollBase.dice[i].results.length; j++) {
-        let diceResult = rollBase.dice[i].results[j].result
+      const dieResults = rollBase.dice[i].results
+      const resultCount = dieResults.length
+      for (let j = 0; j < resultCount; j++) {
+        let diceResult = dieResults[j].result
         diceResults.push({ dice: `${singleDice.toUpperCase()}`, value: diceResult })
         diceSum += diceResult
         if (hasMaxValue) {
@@ -626,6 +628,8 @@ export default class LethalFantasyRoll extends Roll {
             diceResult = r.dice[0].results[0].result
             diceResults.push({ dice: `${singleDice.toUpperCase()}-1`, value: diceResult - 1 })
             diceSum += (diceResult - 1)
+            // Add to DieTerm results so DSN/Foundry display shows explosion dice
+            dieResults.push({ result: diceResult, active: true })
           }
         }
       }
@@ -1214,6 +1218,7 @@ export default class LethalFantasyRoll extends Roll {
       diceResult = r.dice[0].results[0].result
       diceResults.push({ dice: `${dice.toUpperCase()}-1`, value: diceResult - 1 })
       diceSum += (diceResult - 1)
+      rollBase.dice[0].results.push({ result: diceResult, active: true })
     }
     if (fullModifier !== 0) {
       diceResults.push({ dice: `${rollModifier.formula.toUpperCase()}`, value: rollModifier.total })
@@ -1376,6 +1381,7 @@ export default class LethalFantasyRoll extends Roll {
       diceResult = r.dice[0].results[0].result
       diceResults.push({ dice: `${dice.toUpperCase()}-1`, value: diceResult - 1 })
       diceSum += (diceResult - 1)
+      rollBase.dice[0].results.push({ result: diceResult, active: true })
     }
 
     if (fullModifier !== 0) {
@@ -1588,7 +1594,8 @@ export default class LethalFantasyRoll extends Roll {
     let diceSum = 0
     for (const term of roll.dice) {
       const singleDice = `1D${term.faces}`
-      for (const r of term.results) {
+      const termResults = Array.from(term.results)
+      for (const r of termResults) {
         let diceResult = r.result
         diceResults.push({ dice: singleDice.toUpperCase(), value: diceResult })
         diceSum += diceResult
@@ -1599,6 +1606,7 @@ export default class LethalFantasyRoll extends Roll {
             diceResult = xr.dice?.[0]?.results?.[0]?.result ?? (term.faces - 1)
             diceResults.push({ dice: `${singleDice.toUpperCase()}-1`, value: diceResult - 1 })
             diceSum += (diceResult - 1)
+            term.results.push({ result: diceResult, active: true })
           }
         }
       }