fix: add /no_think inline tag to disable Qwen3 thinking mode

chat_template_kwargs isn't being respected by the vLLM deployment.
Qwen3 models support /no_think as an inline suffix in the user message
to disable thinking mode. This is the most reliable method across all
serving backends (vLLM, Ollama, SGLang).

services/recommendation/thesis_llm.py

@@ -76,7 +76,7 @@ Rewrite the following structured thesis into clear, professional analyst prose.
 {context_block}
 --- END CONTEXT ---
 
-Return ONLY the rewritten thesis. No other text."""
+Return ONLY the rewritten thesis. No other text. /no_think"""
 
     return {
         "system": THESIS_SYSTEM_PROMPT,