feat: support custom labels for stat modifiers

Allows passing an optional label to `parseStatModifiers` to override
the default ID-based label. This enables more descriptive names in
the UI and improves how modifier labels are derived in the journal
view.

src/cli/completions/block-processor.ts

@@ -114,7 +114,7 @@ export function processBlocks(
 
       if (attrs.role === "stat-modifiers") {
         const id = attrs.id || `_mod_${contentHash(body)}`;
-        const result = parseStatModifiers(body, fileRelativePath, id);
+        const result = parseStatModifiers(body, fileRelativePath, id, "player", attrs.extra["label"]);
         blocks.stats.push(result.statDef);
         blocks.stats.push(...result.modifierDefs);
         blocks.statTemplates.push(result.template);