a refused subscribe stays refused; it was re-arming its own retry

surfaces/quickshell/services/ViewtopControl.qml

@@ -75,6 +75,12 @@ Singleton {
     // True once the compositor has accepted a `subscribe` and is pushing canvas
     // changes down the second socket below.
     property bool subscribed: false
+    // A compositor that does not serve `subscribe` will not start serving it
+    // while it is running. Latch the refusal, or the disconnect that follows it
+    // re-arms the retry that the refusal just stopped — which is a reconnect
+    // loop at timer speed against a socket that will keep saying no. Cleared by
+    // the shell restarting, which is also when the compositor has changed.
+    property bool _pushRefused: false
 
     // The poll, which now exists only as the fallback for a compositor too old
     // to push.
@@ -141,7 +147,8 @@ Singleton {
                 // Either the compositor went away or it never served the op.
                 // Both mean the poll is the truth again until we get back in.
                 root.subscribed = false;
-                resubscribe.restart();
+                if (!root._pushRefused)
+                    resubscribe.restart();
             }
         }
 
@@ -165,6 +172,7 @@ Singleton {
                         + (reply.code || "refused")
                         + "); falling back to the 2 s poll");
                     root.subscribed = false;
+                    root._pushRefused = true;
                     resubscribe.stop();
                     feed.connected = false;
                     return;
@@ -183,7 +191,7 @@ Singleton {
         id: resubscribe
         interval: 5000
         repeat: false
-        onTriggered: if (!root.subscribed) feed.connected = true
+        onTriggered: if (!root.subscribed && !root._pushRefused) feed.connected = true
     }
 
     // Requests waiting on a connection. A queue rather than SessiondPolicy's