fix: default clear_thinking=true (README already documented this; prevents the multi-turn reasoning-replay loop)

chat_template.jinja

@@ -1,7 +1,7 @@
 [gMASK]<sop>
 {%- set effective_reasoning_effort = reasoning_effort if reasoning_effort is defined and reasoning_effort in ['low', 'high'] else 'max' -%}
 {%- if effective_reasoning_effort is not none -%}<|system|>Reasoning Effort: {{ effective_reasoning_effort | capitalize }}{%- endif -%}
-{%- set clear_thinking = clear_thinking if clear_thinking is defined else false -%}
+{%- set clear_thinking = clear_thinking if clear_thinking is defined else true -%}
 {%- if tools -%}
 {%- macro tool_to_json(tool) -%}
     {%- set ns_tool = namespace(first=true) -%}