fix: always send stop on ESC regardless of cached state

Removes the activeState !== 'idle' check before sending the stop
command. The server-side Interrupt() is safe to call on an idle
agent (returns false, no-op).

This fixes an intermittent issue where pressing ESC wouldn't stop
the agent because the GUI's cached activeState was stale/out-of-sync
with the server's actual state.

gui/main.qml

@@ -64,7 +64,10 @@ ApplicationWindow {
         onActivated: {
             if (renamingIndex >= 0) {
                 cancelRename()
-            } else if (ollie.activeState !== "idle") {
+            } else {
+                // Always send stop - server-side Interrupt() is safe to call
+                // on an idle agent (no-op). This avoids races where the GUI's
+                // cached activeState is stale.
                 ollie.interrupt()
             }
         }