Change a screen's settings on the screen itself (0.2.52)

Holding the top bar for about a second and a half opens a settings page on the
screen, with a blue line filling along the top edge while you hold. A built-in
screen.settings tile and the esphome.<screen>_open_settings action open it too.

The page is one constexpr table of rows in settings_screen.h: Brightness,
Night, Screen (clock, back to page 1, swiping, rotation) and This screen (name,
address, firmware, Home Assistant, Restart). Toggles flip on a tap, numbers and
times step with -/+ (a held time walks whole hours), a choice cycles in a chip,
and a row that depends on a switch above it is greyed out. The LVGL objects exist
only while the page is open: +608 bytes of RAM and +10.7 KB of flash on the CYD.
A change is saved, applied and reported through the existing screen_setting
event, so ESP Screens shows the same value within a second.

New setting auto_home (default on, 2 minutes): an open card, the settings page
or a later page goes back to page 1 after that long without a touch, not only on
standby. It travels beside the frozen eleven-key settings block with its own
preference, so older firmware and older apps keep working.

docs/SETTINGS.md is the recipe for adding a setting; the Claude skill explains
the page. Firmware 0.2.44.

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

tests/test_tile_icons.py

@@ -48,7 +48,15 @@ class IconSetTests(unittest.TestCase):
         for domains, code in re.findall(r'if \((d == "\w+"(?: \|\| d == "\w+")*)\) return "\\U000(F[0-9A-F]{4})";', body):
             for domain in re.findall(r'"(\w+)"', domains):
                 native[domain] = code
-        self.assertEqual(native, {domain: tile_icons.GLYPHS[name] for domain, name in tile_icons.DEFAULTS.items()})
+        # The built-in cards pick per entity, not per domain: a clock or the settings page.
+        settings, clock = re.search(
+            r'if \(d == "screen"\) return tile\.is_settings\(\) \? "\\U000(F[0-9A-F]{4})" : "\\U000(F[0-9A-F]{4})";', body).groups()
+        builtin = {entity: tile_icons.GLYPHS[name] for entity, name in tile_icons.BUILTIN_TILES.items()}
+        self.assertEqual({'screen.settings': settings, 'screen.clock': clock}, builtin)
+        self.assertEqual(tile_icons.editor()['builtin'], builtin)
+        self.assertEqual(tile_icons.GLYPHS[tile_icons.DEFAULTS['screen']], clock)
+        expected = {domain: tile_icons.GLYPHS[name] for domain, name in tile_icons.DEFAULTS.items() if domain != 'screen'}
+        self.assertEqual(native, expected)
         self.assertIn(f'return "\\U000{tile_icons.GLYPHS[tile_icons.FALLBACK]}";', body)
         weather = HEADER.split('inline const char *weather_icon(const std::string &condition) {', 1)[1].split('\n}', 1)[0]
         for state, name in tile_icons.WEATHER.items():