Show live values on the mockup, blink a screen to identify it, try an alert, copy and share layouts (0.2.74)

The tiles draw what Home Assistant reports (a new /api/states answers for the tiles on the page); the ···
menu gets Identify (the screen's own show_alert with flash), Copy layout from another screen, Export and
Import as JSON; the Alerts page opens with Try it (/api/alerts/test, one screen or all); the library filters
by room and hides what is placed, with lit icons for what is on; ⌘K searches screens, entities and actions;
the Update badge lists what's new from the changelog (copied into the image) and a running update shows a
progress bar with the ESPHome stage and the last log line.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

screen_manager/app/updates.py

@@ -7,6 +7,7 @@ import os
 from pathlib import Path
 import re
 import time
+import changelog
 from core import FIRMWARE_VERSION
 
 LOG = logging.getLogger('screen_manager')
@@ -31,6 +32,8 @@ class Updater:
         self.manager, self.path = manager, Path(path)
         self.auto, self.hosts, self.results, self.last_round = False, {}, {}, None
         self.task, self.current, self.queue, self.phase = None, None, [], None
+        # What's new since a screen's firmware, for the Update badge (app 0.2.74).
+        self.changelog = changelog.load()
         if self.path.exists():
             raw = json.loads(self.path.read_text())
             if raw.get('version') != 1:
@@ -103,7 +106,7 @@ class Updater:
 
     def summary(self, screens=None, profiles=None):
         return {'auto': self.auto, 'target': FIRMWARE_VERSION, 'busy': self.current,
-                'pending': len(self.pending(screens, profiles)), 'last_round': self.last_round}
+                'pending': len(self.pending(screens, profiles)), 'last_round': self.last_round, 'changelog': self.changelog}
 
     def pending(self, screens=None, profiles=None):
         # Callers that already hold the inventory and profile list pass them in; the inventory