assistant: grey out the mic when the model cannot hear

AssistantModule keeps each router model's input_modalities and exposes
hears: the model loading, else the first not unloaded (the daemon's
rule), reports audio. Unknown inputs or a router that is down count as
yes; the daemon's error covers the rest. The model list is now read on
every canvas open, not only when a preferred model is set, so hears is
current when the card shows.

Checked: the rule against the router's live /models (Gemma resident:
on; Qwen resident or loading: off; router down: on). Not yet seen by
eye after a desktop shell reload.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/desktop/assistant/Assistant.qml b/desktop/assistant/Assistant.qml
index 865f157..c4d0771 100644
--- a/desktop/assistant/Assistant.qml
+++ b/desktop/assistant/Assistant.qml
@@ -212,9 +212,12 @@ Scope {
     property var mic: null                // the recording's Process, null when not recording
     property int micSecs: 0
     readonly property bool recording: root.mic !== null
+    // Whether the model in use takes audio. Set from shell.qml.
+    property bool hears: true
 
     function record() {
-        if (root.recording || !root.connected || root.busy || root.opRunning || root.blocked) return;
+        if (root.recording || !root.connected || !root.hears || root.busy || root.opRunning
+            || root.blocked) return;
         root.notice = "";
         root.micSecs = 0;
         root.mic = micRun.createObject(root);