Memory/QMD: treat prefixed no-results markers as empty

CHANGELOG.md

@@ -45,6 +45,7 @@ Docs: https://docs.openclaw.ai
 - Memory/QMD: parse qmd scope keys once per request to avoid repeated parsing in scope checks.
 - Memory/QMD: query QMD index using exact docid matches before falling back to prefix lookup for better recall correctness and index efficiency.
 - Memory/QMD: make QMD result JSON parsing resilient to noisy command output by extracting the first JSON array from noisy `stdout`.
+- Memory/QMD: treat prefixed `no results found` marker output as an empty result set in qmd JSON parsing. (#11302) Thanks @blazerui.
 - Memory/QMD: pass result limits to `search`/`vsearch` commands so QMD can cap results earlier.
 - Memory/QMD: avoid reading full markdown files when a `from/lines` window is requested in QMD reads.
 - Memory/QMD: skip rewriting unchanged session export markdown files during sync to reduce disk churn.