v1.0.42: fix duplicate timer race across different buttons

pendingKeyDown was a Set keyed by action.id, so it only blocked a
button from re-firing itself. Pressing two different buttons in fast
succession (e.g. RB01 then RA01) both passed the guard, both read
memRunningActionId before either had persisted it, and both started
a Notion timer entry. Replaced with a single keyDownBusy flag shared
across all buttons of the action, set synchronously before the first
await, closing the race.

src/plugin.ts

@@ -1,4 +1,4 @@
-const CURRENT_VERSION = "1.0.41";
+const CURRENT_VERSION = "1.0.42";
 const GITEA_BASE = "https://gitea.pdmarf.co.uk/pdm/stream_deck_notion_timer/raw/branch/stable-rebuild";
 const SIGNING_PUBLIC_KEY = `-----BEGIN PUBLIC KEY-----
 MCowBQYDK2VwAyEAN7ko8TUpuPzPAJuKAZCRjV0c4ZSlou5d9pUAF6o12b4=
@@ -182,7 +182,7 @@ async function promptContinue(title: string): Promise<"stop" | "continue" | "tim
 @action({ UUID: "com.pdma.notion-timer.toggle" })
 class TimerToggle extends SingletonAction<TimerSettings> {
   private projectCache = new Map<string, TimerSettings>();
-  private pendingKeyDown = new Set<string>();
+  private keyDownBusy = false;
   private elapsedCheckTimer: NodeJS.Timeout | null = null;
 
   private clearElapsedCheck(): void {
@@ -240,8 +240,11 @@ class TimerToggle extends SingletonAction<TimerSettings> {
   }
 
   async onKeyDown(ev: KeyDownEvent<TimerSettings>): Promise<void> {
-    if (this.pendingKeyDown.has(ev.action.id)) return;
-    this.pendingKeyDown.add(ev.action.id);
+    // Global lock across ALL buttons of this action, not just this one — otherwise
+    // near-simultaneous presses on two different buttons both read memRunningActionId
+    // as "nothing running" and both start a timer in Notion.
+    if (this.keyDownBusy) return;
+    this.keyDownBusy = true;
     try {
     const { projectId, projectName } = ev.payload.settings;
     const title = buttonTitle(projectName || "");
@@ -293,7 +296,7 @@ class TimerToggle extends SingletonAction<TimerSettings> {
       await ev.action.showAlert();
     }
     } finally {
-      this.pendingKeyDown.delete(ev.action.id);
+      this.keyDownBusy = false;
     }
   }
 }