assistant: Load no longer changes the preferred model

Load set the preference as well as swapping the model in, so loading a
model from the settings page for any reason made it the assistant's
model too: after loading Qwen there, the canvas kept Qwen instead of
bringing the preferred Gemma back. Load and Prefer are now separate
buttons: Load swaps a model in now and leaves the preference alone, and
Prefer only records which model the canvas loads when it opens.

The canvas header also showed a stale model name after a swap; it now
takes the model from the daemon's ctx event, which carries it from
desktop-assistant f9d4644 on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/desktop/assistant/Assistant.qml b/desktop/assistant/Assistant.qml
index 6692648..cc1d3d5 100644
--- a/desktop/assistant/Assistant.qml
+++ b/desktop/assistant/Assistant.qml
@@ -369,7 +369,9 @@ Scope {
             root.state = e.state;
             root.runningTool = e.state === "tool" ? e.tool : "";
             break;
-        case "ctx": root.ctxUsed = e.used; root.ctxMax = e.max; break;
+        // ctx carries the model since the router can swap it after hello; an
+        // older daemon leaves it out, and the hello's name stands.
+        case "ctx": root.ctxUsed = e.used; root.ctxMax = e.max; if (e.model) root.model = e.model; break;
         case "conversations": root.convs = e.items; break;
         case "results": root.results = e.items; break;
         }