chat : pass reasoning_effort to template

* chat: add reasoning_effort to common_chat_templates_inputs

Store OpenAI Chat Completions reasoning_effort and make it
available to jinja templates (with model specific translations
where required).

Assisted-by: llama.cpp:Muse-Glimmer-30B

* server : fixup reading reasoning effort from body

server_chat_convert_responses_to_chatcmpl already handles conversion of
Responses API reasoning.effort to reasoning_effort

* chat : expose reasoning effort

Assisted-by: Claude Opus 5

* chat : add reasoning_effort to generation_params

Assisted-by: Claude Opus 5

* chat : move reasoning_effort next to enable_thinking

Assisted-by: Claude Opus 5

* cont : mirror preserve_reasoning

* cont : pass context through analyze function

---------

Co-authored-by: Alde Rojas <hello@alde.dev>

common/jinja/caps.h

@@ -16,6 +16,9 @@ struct caps {
     // supports preserve reasoning trace in the full history, not just the last assistant message
     bool supports_preserve_reasoning = false;
 
+    // supports reasoning effort levels
+    bool supports_reasoning_effort = false;
+
     // one of the 2 content capabilities must be true
     bool supports_string_content = true;
     bool supports_typed_content = false;
@@ -32,5 +35,6 @@ struct caps {
 caps caps_get(jinja::program & prog);
 
 void caps_apply_preserve_reasoning(jinja::context & ctx, bool enabled);
+void caps_apply_reasoning_effort(jinja::context & ctx, const std::string & effort);
 
 } // namespace jinja