Put ESP Screens in English and keep layouts when entity IDs change (0.2.40)

Everything a user sees or reads is now English: both boards' labels,
status replies and logs, the ESP Screens editor and Alerts cheatsheet,
and the README and guides (docs/TILES.md, CALIBRATING.md, ACCEPTANCE.md
and TROUBLESHOOTING.md replace the Dutch file names). Labels follow
Home Assistant's own English names (Heat/Cool modes, Heating/Cooling
actions, Away, Returning to dock, weather conditions), dates use English
abbreviations and the top bar writes numbers the English way. Docs use
HA 2026.9's menu names (Settings -> Apps, App store, Settings -> Tools).
Unused legacy files (home-like.yaml, buttons.yaml, a.out) are removed.

Firmware 0.2.34 names its entities in English. Home Assistant registers
a renamed ESPHome entity under a new entity ID, so the inbox
text.<screen>_tegelinstellingen becomes text.<screen>_tile_settings and
the layout stored under the old ID would be lost. The manager now
recognises the screen by its device, during a run or after a restart,
and moves its layout and update history along; the Update button and
the nightly round follow the screen through the rename. Screens that
still run 0.2.33 or older keep working: both languages are matched.

Main is the only release branch from now on.

Tested on a Home Assistant Yellow (HA 2026.9.1) with both bench boards:
see docs/TEST_RESULTS_0240.md.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/test_onboarding.py

@@ -46,7 +46,7 @@ class CalibrationTests(unittest.TestCase):
     def test_center_is_not_used_to_hide_bad_fit(self):
         data = measurements()
         for s in data['points'][4]['samples']: s['raw_x'] += 600
-        with self.assertRaisesRegex(ValueError, 'midden'): calibrate.fit(data)
+        with self.assertRaisesRegex(ValueError, 'center'): calibrate.fit(data)
 
     def test_jitter_rejected(self):
         data = measurements()
@@ -93,7 +93,7 @@ class InstallationTests(unittest.TestCase):
             new_device.create(b, 'display-b', 'Display B')
             original = (Path(a)/'secrets.yaml').read_text()
             self.assertNotEqual(original, (Path(b)/'secrets.yaml').read_text())
-            self.assertNotIn('WORDT_UNIEK_GEGENEREERD', original)
+            self.assertNotIn('WILL_BE_UNIQUELY_GENERATED', original)
             with self.assertRaises(ValueError): new_device.create(a, 'new', 'New')
             self.assertEqual(original, (Path(a)/'secrets.yaml').read_text())
 
@@ -117,7 +117,7 @@ class InstallationTests(unittest.TestCase):
                 self.assertEqual(values['TOUCH_AFFINE_XX'], '1.000000000')
                 self.assertEqual(values['DIRECT_ACTIONS'], 'false')
                 for i in range(1,11):
-                    self.assertRegex(values[f'TILE{i}_ENTITY'], r'\.(voorbeeld_|ongebruikt_)')
+                    self.assertRegex(values[f'TILE{i}_ENTITY'], r'\.(example_|unused_)')
                 archive.extractall(tmp)
             new_device.create(Path(tmp)/'cyd-display', 'fresh-board', 'Fresh board')
             with self.assertRaises(FileExistsError): export_bundle.export(ROOT, output)