fix(ui): move reasoning chip after model chip in composer footer (#937)

Reasoning is a sub-setting of the model (applies only to models that
support it), so the model should come first. This also keeps the model
chip in a stable position regardless of whether reasoning is active.

Order was: Profile → Workspace → Reasoning → Model
Order now:  Profile → Workspace → Model → Reasoning

Co-authored-by: nesquena-hermes <nesquena-hermes@users.noreply.github.com>

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## [Unreleased]
 
+### Fixed
+- **Reasoning chip now appears after the model chip** in the composer toolbar — model is a more fundamental choice and should be stable in position regardless of whether reasoning is active. Order: Profile → Workspace → Model → Reasoning. (`static/index.html`)
+
 ## v0.50.184 — 2026-04-24
 
 ### Fixed