fix(tracker): follow active hyprland and visible x11 windows

src/window-trackers/x11-tracker.test.ts

@@ -18,11 +18,51 @@ Height: 720
   });
 });
 
+test('parseX11WindowGeometry preserves negative coordinates', () => {
+  const geometry = parseX11WindowGeometry(`
+Absolute upper-left X:  -1920
+Absolute upper-left Y:  -24
+Width: 1920
+Height: 1080
+`);
+  assert.deepEqual(geometry, {
+    x: -1920,
+    y: -24,
+    width: 1920,
+    height: 1080,
+  });
+});
+
 test('parseX11WindowPid parses xprop output', () => {
   assert.equal(parseX11WindowPid('_NET_WM_PID(CARDINAL) = 4242'), 4242);
   assert.equal(parseX11WindowPid('_NET_WM_PID(CARDINAL) = not-a-number'), null);
 });
 
+test('X11WindowTracker searches only visible mpv windows', async () => {
+  const commands: Array<{ command: string; args: string[] }> = [];
+  const tracker = new X11WindowTracker(undefined, async (command, args) => {
+    commands.push({ command, args });
+    if (command === 'xdotool') {
+      return '123';
+    }
+    if (command === 'xwininfo') {
+      return `Absolute upper-left X:  0
+Absolute upper-left Y:  0
+Width: 640
+Height: 360`;
+    }
+    return '';
+  });
+
+  (tracker as unknown as { pollGeometry: () => void }).pollGeometry();
+  await new Promise((resolve) => setTimeout(resolve, 0));
+
+  assert.deepEqual(commands[0], {
+    command: 'xdotool',
+    args: ['search', '--onlyvisible', '--class', 'mpv'],
+  });
+});
+
 test('X11WindowTracker skips overlapping polls while one command is in flight', async () => {
   let commandCalls = 0;
   let release: (() => void) | undefined;