fix(overlay): Linux X11/XWayland stacking, stale pause state, multi-copy selector (#101)

src/main/runtime/playback-paused-state.ts

@@ -0,0 +1,39 @@
+type PlaybackPausedMpvClient = {
+  connected?: boolean;
+  requestProperty?: (name: string) => Promise<unknown>;
+};
+
+function coercePlaybackPaused(value: unknown): boolean | null {
+  if (typeof value === 'boolean') return value;
+  if (typeof value === 'number') return value !== 0;
+  if (typeof value === 'string') {
+    const normalized = value.trim().toLowerCase();
+    if (normalized === 'no' || normalized === 'false' || normalized === '0') return false;
+    if (normalized === 'yes' || normalized === 'true' || normalized === '1') return true;
+  }
+  return null;
+}
+
+export async function resolveFreshPlaybackPaused(deps: {
+  getCachedPlaybackPaused: () => boolean | null;
+  getMpvClient: () => PlaybackPausedMpvClient | null;
+}): Promise<boolean | null> {
+  const cachedPaused = deps.getCachedPlaybackPaused();
+  if (cachedPaused === true) {
+    return true;
+  }
+
+  const client = deps.getMpvClient();
+  if (client?.connected === true && typeof client.requestProperty === 'function') {
+    try {
+      const livePaused = coercePlaybackPaused(await client.requestProperty('pause'));
+      if (livePaused !== null) {
+        return livePaused;
+      }
+    } catch {
+      // Avoid trusting a stale cached "playing" state for hover auto-pause.
+    }
+  }
+
+  return cachedPaused === false ? null : cachedPaused;
+}