Adds a default template to resolver, adds "last" variable

lib/tcmd/Resolver.tsx

@@ -34,8 +34,8 @@ export function OnDemandResolver({
   const res = useRef(new TTCQueryResolver(parser));
   const [content, setContent] = useState<ReactNode>("");
   const generateContent = useCallback(() => {
-    let content = template;
-    const stackIdxs = Array.from(new Set(template.match(/\$\d/g)));
+    let content = template || "$x";
+    const stackIdxs = Array.from(new Set(content.match(/\$(?:\d+|x)/g)));
     for (const idx of stackIdxs) {
       let thing = res.current.getFromStack(idx);
       if (Array.isArray(thing)) thing = thing.at(0);
@@ -52,12 +52,16 @@ export function OnDemandResolver({
   }, [res, resolver, generateContent]);
 
   return (
-    <>
-      <button onMouseDown={() => setContent("")} onClick={resolve}>
+    <div className="my-2 rounded-md p-1 bg-black/20 w-min">
+      <button
+        className="text-primary-600"
+        onMouseDown={() => setContent("")}
+        onClick={resolve}
+      >
         {title ?? "Resolve"}
       </button>
       <br />
       {!!content && <span>{content}</span>}
-    </>
+    </div>
   );
 }

lib/ttcQuery/TTCResolvers.ts

@@ -165,6 +165,7 @@ export class TTCQueryResolver {
   }
 
   public getFromStack(stackIndex: string): StackItem {
+    if (stackIndex === "$x") return this.stack.at(-1)!;
     const i = Number(stackIndex.replace("$", ""));
     const val = this.stack[i];
     return val;