fix(trace/list): differentiate empty page from no results in formatter

Restore hasMore check in formatTraceListHuman so the primary message
says 'No traces on this page.' when more pages exist, consistent with
the hint that suggests the next-page command. Previously, the formatter
always said 'No traces found.' which contradicted the hint.

Author: BYK

src/commands/trace/list.ts

@@ -118,15 +118,16 @@ export function parseSort(value: string): SortValue {
 /**
  * Format trace list data for human-readable terminal output.
  *
- * Handles two display states:
- * - Empty list → "No traces found." (next-page hint is in CommandOutput.hint)
+ * Handles three display states:
+ * - Empty list with more pages → "No traces on this page."
+ * - Empty list, no more pages → "No traces found."
  * - Non-empty → header line + formatted table
  */
 function formatTraceListHuman(result: TraceListResult): string {
-  const { traces, org, project } = result;
+  const { traces, hasMore, org, project } = result;
 
   if (traces.length === 0) {
-    return "No traces found.";
+    return hasMore ? "No traces on this page." : "No traces found.";
   }
 
   return `Recent traces in ${org}/${project}:\n\n${formatTraceTable(traces)}`;
@@ -267,7 +268,7 @@ export const listCommand = buildListCommand("trace", {
     // Build footer hint based on result state
     let hint: string | undefined;
     if (traces.length === 0 && hasMore) {
-      hint = `No traces on this page. Try the next page: ${nextPageHint(org, project, flags)}`;
+      hint = `Try the next page: ${nextPageHint(org, project, flags)}`;
     } else if (traces.length > 0) {
       const countText = `Showing ${traces.length} trace${traces.length === 1 ? "" : "s"}.`;
       hint = hasMore