fix: adapt _safe_repair_json to json-repair 0.60 semantics

json-repair >= 0.60 returns an empty string for plain-text input and
wraps brace-enclosed junk in a single-element list instead of the old
""/{} sentinel values. Treat both as unrepairable so the original
tool input is preserved.

Author: theCyberTech

lib/crewai/src/crewai/agents/parser.py

@@ -173,7 +173,12 @@ def _safe_repair_json(tool_input: str) -> str:
     tool_input = tool_input.replace('"""', '"')
 
     result = repair_json(tool_input)
-    if result in UNABLE_TO_REPAIR_JSON_RESULTS:
+    if not result or result in UNABLE_TO_REPAIR_JSON_RESULTS:
+        return tool_input
+
+    # json-repair >= 0.60 wraps non-JSON input in a single-element list;
+    # treat that as unrepairable and return the original.
+    if result.startswith("[") and not tool_input.lstrip().startswith("["):
         return tool_input
 
     return str(result)