fix: very minor memory leak

src/switcher/state/Applications.swift

@@ -211,6 +211,10 @@ class Applications {
             let pid = tApp.processIdentifier
             AXCallScheduler.shared.removeEntry(key: "pid-\(pid)")
             AXCallScheduler.shared.removeEntries(withPrefix: "pid-\(pid)-")
+            // one-shot subscription keys (see Application.observeEvents) use the `sub-app-` prefix, which
+            // the `pid-` cleanup above misses; strip them here too or they leak 6 entries per app.
+            AXCallScheduler.shared.removeEntry(key: "sub-app-\(pid)")
+            AXCallScheduler.shared.removeEntries(withPrefix: "sub-app-\(pid)-")
             AXCallScheduler.shared.removeUnresponsivePid(pid)
         }
         App.refreshOpenUiAfterExternalEvent([])

src/switcher/state/Windows.swift

@@ -460,6 +460,10 @@ class Windows {
         for w in windows {
             if let wid = w.cgWindowId {
                 AXCallScheduler.shared.removeEntries(withPrefix: "wid-\(wid)-")
+                // one-shot subscription keys (see Window.observeEvents) use the `sub-win-` prefix, so the
+                // `wid-` cleanup above misses them; strip them here too or they leak 6 entries per window.
+                AXCallScheduler.shared.removeEntry(key: "sub-win-\(wid)")
+                AXCallScheduler.shared.removeEntries(withPrefix: "sub-win-\(wid)-")
                 Applications.windowAttributesThrottler.removeEntries(withPrefix: "\(wid)-")
                 Applications.screenshotThrottler.removeEntry(withKey: "capture-wid-\(wid)")
             }