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, 15 insertions, 7 deletions

diff --git a/desktop/modules/assistant/AssistantPage.qml b/desktop/modules/assistant/AssistantPage.qml
index 2e40ed4..c6b63fc 100644
--- a/desktop/modules/assistant/AssistantPage.qml
+++ b/desktop/modules/assistant/AssistantPage.qml
@@ -165,8 +165,9 @@ Column {
     Small {
         width: page.width
         wrapMode: Text.Wrap
-        text: "The assistant answers with whichever model llama-server has loaded. Load makes one the "
-            + "preferred model and loads it now, which swaps out the loaded one for every client."
+        text: "The assistant answers with whichever model llama-server has loaded. Opening it loads "
+            + "the preferred model if another one is in. Load swaps a model in now, for every client, "
+            + "without changing the preference."
     }
 
     Small {
@@ -211,13 +212,20 @@ Column {
                        modelRow.preferred ? "preferred" : ""].filter(s => s).join("  ·  ")
                 color: modelRow.preferred ? Theme.accent : Theme.subtext
             }
+            // Two separate choices: which model the assistant prefers, kept,
+            // and which one is loaded now, a swap for every client.
             Button {
+                id: loadBtn
                 anchors { right: parent.right; rightMargin: 6; verticalCenter: parent.verticalCenter }
-                text: modelRow.loaded ? (modelRow.preferred ? "Loaded" : "Prefer") : "Load"
-                enabled: page.asst.loading === "" && !(modelRow.loaded && modelRow.preferred)
-                // A loaded model only becomes the preferred one: nothing to swap.
-                onClicked: modelRow.loaded ? Prefs.setAssistantModel(modelRow.modelData.id)
-                                           : page.asst.loadModel(modelRow.modelData.id)
+                text: "Load"
+                enabled: page.asst.loading === "" && !modelRow.loaded
+                onClicked: page.asst.loadModel(modelRow.modelData.id)
+            }
+            Button {
+                anchors { right: loadBtn.left; rightMargin: 6; verticalCenter: parent.verticalCenter }
+                text: modelRow.preferred ? "Preferred" : "Prefer"
+                enabled: !modelRow.preferred
+                onClicked: Prefs.setAssistantModel(modelRow.modelData.id)
             }
         }
     }