release: the Plasma classroom becomes stable 0.2.0

0.1.50 was taken to the church and the things a container cannot answer
were answered on the hardware: boot, autologin, the panel after a reboot,
panel and browser scaling, Wonder Ink, Parent Call opening in the corner
and reaching the sanctuary with a typed name, readable and silent
notifications, HDMI audio and the volume keys.

The promotion is a fast-forward. The experiment was cut from the
published stable source and never diverged from it, so master reaches
this work without a merge and there is one history.

One thing changed for the release. The channel rules turn around:
classroom-v2 and hyprland are the obsolete channels now and a room on
either comes home to stable, while canary — where the next development
release goes — and any channel somebody named by hand stay where they
were put. A fresh installation has always defaulted to stable.

Nothing else moved. This is the 0.1.50 that was verified, with a version
number and a channel rule.

Co-Authored-By: Claude Opus 5 <[email protected]>

tests/test-display-settings.sh

@@ -26,7 +26,9 @@ with tempfile.TemporaryDirectory() as tmp:
     for channel in ('stable', 'canary', 'hyprland', 'classroom-v2', 'custom'):
         path.write_text(original.replace('CHANNEL=classroom-v2', 'CHANNEL='+channel))
         subprocess.run([sys.executable, '-c', code, str(path)], check=True, capture_output=True)
-        expected = channel if channel in ('classroom-v2', 'custom') else 'classroom-v2'
+        # The experiment's channel and hyprland come home to stable;
+        # everything anybody chose deliberately is left alone.
+        expected = 'stable' if channel in ('classroom-v2', 'hyprland') else channel
         assert 'CHANNEL='+expected+'\n' in path.read_text()
         assert 'MQTT_PASSWORD=literal $ and = characters\n' in path.read_text()
 print('Display settings: scale bounds, config preservation, idempotence and channel migration passed.')