feat: add range support for spark table cell matching

src/components/utils/spark-table.ts

@@ -188,6 +188,43 @@ export function scanSparkTables(
   }));
 }
 
+// ---------------------------------------------------------------------------
+// Range parsing
+// ---------------------------------------------------------------------------
+
+/**
+ * Parse a cell value like "1-3", "4-6", or "10-20" into { min, max }.
+ * Returns null if the cell doesn't represent a range.
+ */
+function parseRange(cell: string): { min: number; max: number } | null {
+  const trimmed = cell.trim();
+  const m = /^(\d+)\s*-\s*(\d+)$/.exec(trimmed);
+  if (!m) return null;
+  const min = parseInt(m[1], 10);
+  const max = parseInt(m[2], 10);
+  if (isNaN(min) || isNaN(max)) return null;
+  return { min, max };
+}
+
+/** Test whether a rolled total matches a cell value */
+function matchesCell(diceCell: string, rolledValue: number): boolean {
+  const trimmed = diceCell.trim();
+
+  // Exact integer match
+  const cellNum = parseInt(trimmed, 10);
+  if (!isNaN(cellNum) && rolledValue === cellNum) return true;
+
+  // Exact string match (for non-numeric labels)
+  if (String(rolledValue) === trimmed) return true;
+
+  // Range match (e.g. "1-3")
+  const range = parseRange(trimmed);
+  if (range && rolledValue >= range.min && rolledValue <= range.max)
+    return true;
+
+  return false;
+}
+
 // ---------------------------------------------------------------------------
 // Rolling
 // ---------------------------------------------------------------------------
@@ -207,17 +244,11 @@ export function rollSparkTable(meta: SparkTableMeta): SparkTableResult {
     const roll = rollFormula(meta.notation);
     const rolledValue = roll.result.total;
 
-    // Find the row matching the rolled value — compare as integers,
-    // falling back to string comparison.
+    // Find the row matching the rolled value
     let value = `(no row for ${rolledValue})`;
     for (const row of meta.rows) {
       const diceCell = row[0] ?? "";
-      const cellNum = parseInt(diceCell.trim(), 10);
-      const match =
-        !isNaN(cellNum) && rolledValue === cellNum
-          ? true
-          : String(rolledValue) === diceCell.trim();
-      if (match) {
+      if (matchesCell(diceCell, rolledValue)) {
         value = row[colIdx + 1] ?? "";
         break;
       }