Prepare RuleGel 1.0

lib/app/app_version.dart

@@ -1,2 +1,2 @@
-const appDisplayVersion = '0.4.3';
-const appBuildNumber = 7;
+const appDisplayVersion = '1.0.0';
+const appBuildNumber = 8;

lib/app/changelog.dart

@@ -0,0 +1,34 @@
+const ruleGelChangelog = [
+  RuleGelChange(
+    version: '1.0.0',
+    title: 'Stable 1.0',
+    bullets: [
+      'Local hide-post organization for posts you do not want in the feed.',
+      'Diagnostics report and local log copy tools in Settings.',
+      'Cleaner release metadata and maintenance tools for troubleshooting.',
+      'Windows portable package is published alongside APK and installer.',
+    ],
+  ),
+  RuleGelChange(
+    version: '0.4.3',
+    title: 'Bugfixes',
+    bullets: [
+      'Fixed video play/retry controls.',
+      'Fixed tag chip input and tag navigation from details.',
+      'Fixed collection deletion persistence.',
+      'Settings export now includes blacklist and whitelist data.',
+    ],
+  ),
+];
+
+class RuleGelChange {
+  const RuleGelChange({
+    required this.version,
+    required this.title,
+    required this.bullets,
+  });
+
+  final String version;
+  final String title;
+  final List<String> bullets;
+}