refactor agents to client-owned config flow

app/api/routes/agent_setup.py

@@ -16,9 +16,9 @@ Journey flow:
      delimited by ``PROMPT_TEMPLATE_START`` / ``PROMPT_TEMPLATE_END``.
   5. Server parses the block, sets ``done=True``, and returns the template.
 
-The ``prompt_template`` from the final response is meant to be stored in
-``LocalAgentConfig.prompt_template`` or ``CloudAgentConfig.prompt_template``
-by the Electron client (via the agent CRUD endpoints).
+The ``prompt_template`` from the final response is meant to be stored by
+the Electron client in local agent settings and later sent to
+``POST /agents/trigger`` when a run is executed.
 """
 
 from __future__ import annotations