assistant: unload the resident model from the settings page

The Load button reads Unload on the loaded model and posts to the
router's /models/unload. An error from the router lands in modelError,
the same place a failed load reports, and the list is re-read either way.
The model comes back on the next request for it or when the canvas opens.

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

1 files changed, 6 insertions, 4 deletions

diff --git a/desktop/modules/assistant/AssistantPage.qml b/desktop/modules/assistant/AssistantPage.qml
index bf35763..b25b33b 100644
--- a/desktop/modules/assistant/AssistantPage.qml
+++ b/desktop/modules/assistant/AssistantPage.qml
@@ -168,7 +168,8 @@ Column {
         wrapMode: Text.Wrap
         text: "Each chat uses the model picked in the canvas header, else the preferred one. "
             + "Opening the canvas loads that model if it is a local one and another is in. "
-            + "Load swaps a model in now, for every client, without changing the preference."
+            + "Load swaps a model in now, for every client, without changing the preference; "
+            + "Unload frees the VRAM until something asks for the model again."
     }
 
     Small {
@@ -218,9 +219,10 @@ Column {
             Button {
                 id: loadBtn
                 anchors { right: parent.right; rightMargin: 6; verticalCenter: parent.verticalCenter }
-                text: "Load"
-                enabled: page.asst.loading === "" && !modelRow.loaded
-                onClicked: page.asst.loadModel(modelRow.modelData.id)
+                text: modelRow.loaded ? "Unload" : "Load"
+                enabled: page.asst.loading === ""
+                onClicked: modelRow.loaded ? page.asst.unloadModel(modelRow.modelData.id)
+                                           : page.asst.loadModel(modelRow.modelData.id)
             }
             Button {
                 anchors { right: loadBtn.left; rightMargin: 6; verticalCenter: parent.verticalCenter }