Initial commit: Tagesbyte prototype

Flutter app that collects daily tech news from German and English RSS/Atom
feeds, with a reader view, AI article summaries and daily briefings (Claude
API or n8n webhook), paywall/sponsored filtering and ad/consent blocking.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/models/briefing.dart

@@ -0,0 +1,81 @@
+/// An AI generated digest of the day's news, grouped into topics.
+class DailyBriefing {
+  const DailyBriefing({
+    required this.createdAt,
+    required this.intro,
+    required this.topics,
+    required this.generatedBy,
+  });
+
+  final DateTime createdAt;
+  final String intro;
+  final List<BriefingTopic> topics;
+
+  /// Human readable name of the summarizer, e.g. "Claude (claude-opus-5-5)".
+  final String generatedBy;
+
+  Map<String, dynamic> toJson() => {
+        'createdAt': createdAt.toIso8601String(),
+        'intro': intro,
+        'generatedBy': generatedBy,
+        'topics': topics.map((t) => t.toJson()).toList(),
+      };
+
+  factory DailyBriefing.fromJson(Map<String, dynamic> json) => DailyBriefing(
+        createdAt: DateTime.parse(json['createdAt'] as String),
+        intro: json['intro'] as String? ?? '',
+        generatedBy: json['generatedBy'] as String? ?? '',
+        topics: (json['topics'] as List? ?? [])
+            .map((t) => BriefingTopic.fromJson(t as Map<String, dynamic>))
+            .toList(),
+      );
+}
+
+class BriefingTopic {
+  const BriefingTopic({
+    required this.title,
+    required this.summary,
+    required this.sources,
+  });
+
+  final String title;
+  final String summary;
+  final List<ArticleRef> sources;
+
+  Map<String, dynamic> toJson() => {
+        'title': title,
+        'summary': summary,
+        'sources': sources.map((s) => s.toJson()).toList(),
+      };
+
+  factory BriefingTopic.fromJson(Map<String, dynamic> json) => BriefingTopic(
+        title: json['title'] as String? ?? '',
+        summary: json['summary'] as String? ?? '',
+        sources: (json['sources'] as List? ?? [])
+            .map((s) => ArticleRef.fromJson(s as Map<String, dynamic>))
+            .toList(),
+      );
+}
+
+/// A lightweight pointer to an article, stored with the briefing so links
+/// still work after the feed has been refreshed.
+class ArticleRef {
+  const ArticleRef({
+    required this.title,
+    required this.url,
+    required this.sourceName,
+  });
+
+  final String title;
+  final String url;
+  final String sourceName;
+
+  Map<String, dynamic> toJson() =>
+      {'title': title, 'url': url, 'sourceName': sourceName};
+
+  factory ArticleRef.fromJson(Map<String, dynamic> json) => ArticleRef(
+        title: json['title'] as String? ?? '',
+        url: json['url'] as String? ?? '',
+        sourceName: json['sourceName'] as String? ?? '',
+      );
+}