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/app_settings.dart

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+import 'package:flutter/material.dart' show ThemeMode;
+
+import 'news_source.dart';
+
+enum AiProvider {
+  none('Off'),
+  claude('Claude API'),
+  n8n('n8n webhook');
+
+  const AiProvider(this.label);
+
+  final String label;
+}
+
+const claudeModels = {
+  'claude-opus-5-5': 'Claude Opus 5.5 (best quality)',
+  'claude-sonnet-5-5': 'Claude Sonnet 5.5 (balanced)',
+  'claude-haiku-5-5': 'Claude Haiku 5.5 (cheapest, fastest)',
+};
+
+class AppSettings {
+  const AppSettings({
+    this.aiProvider = AiProvider.none,
+    this.claudeApiKey = '',
+    this.claudeModel = 'claude-opus-5-5',
+    this.n8nWebhookUrl = '',
+    this.summaryLanguage = SourceLanguage.de,
+    this.maxAgeHours = 24,
+    this.corsProxy = '',
+    this.hidePaid = true,
+    this.hideSponsored = true,
+    this.blockAds = true,
+    this.hideCookieBanners = true,
+    this.acceptConsentWalls = true,
+    this.themeMode = ThemeMode.system,
+  });
+
+  final AiProvider aiProvider;
+  final String claudeApiKey;
+  final String claudeModel;
+  final String n8nWebhookUrl;
+  final SourceLanguage summaryLanguage;
+  final int maxAgeHours;
+
+  /// Web only: prefix for feed/article URLs to get around browser CORS.
+  final String corsProxy;
+
+  /// Hide paywalled articles (heise+, SPIEGEL+, Golem Plus, t3n Pro).
+  final bool hidePaid;
+
+  /// Hide sponsored posts ("Anzeige:").
+  final bool hideSponsored;
+
+  /// Original-page view: block ad/tracker requests and hide ad slots.
+  final bool blockAds;
+
+  /// Original-page view: block consent managers and hide their banners.
+  final bool hideCookieBanners;
+
+  /// Accept consent on sites that only show articles after accepting (Golem).
+  final bool acceptConsentWalls;
+
+  /// Light, dark, or follow the phone's setting.
+  final ThemeMode themeMode;
+
+  bool get aiConfigured => switch (aiProvider) {
+        AiProvider.none => false,
+        AiProvider.claude => claudeApiKey.isNotEmpty,
+        AiProvider.n8n => n8nWebhookUrl.startsWith('http'),
+      };
+
+  AppSettings copyWith({
+    AiProvider? aiProvider,
+    String? claudeApiKey,
+    String? claudeModel,
+    String? n8nWebhookUrl,
+    SourceLanguage? summaryLanguage,
+    int? maxAgeHours,
+    String? corsProxy,
+    bool? hidePaid,
+    bool? hideSponsored,
+    bool? blockAds,
+    bool? hideCookieBanners,
+    bool? acceptConsentWalls,
+    ThemeMode? themeMode,
+  }) =>
+      AppSettings(
+        aiProvider: aiProvider ?? this.aiProvider,
+        claudeApiKey: claudeApiKey ?? this.claudeApiKey,
+        claudeModel: claudeModel ?? this.claudeModel,
+        n8nWebhookUrl: n8nWebhookUrl ?? this.n8nWebhookUrl,
+        summaryLanguage: summaryLanguage ?? this.summaryLanguage,
+        maxAgeHours: maxAgeHours ?? this.maxAgeHours,
+        corsProxy: corsProxy ?? this.corsProxy,
+        hidePaid: hidePaid ?? this.hidePaid,
+        hideSponsored: hideSponsored ?? this.hideSponsored,
+        blockAds: blockAds ?? this.blockAds,
+        hideCookieBanners: hideCookieBanners ?? this.hideCookieBanners,
+        acceptConsentWalls: acceptConsentWalls ?? this.acceptConsentWalls,
+        themeMode: themeMode ?? this.themeMode,
+      );
+}

lib/models/article.dart

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+import 'news_source.dart';
+
+class Article {
+  const Article({
+    required this.title,
+    required this.link,
+    required this.source,
+    this.published,
+    this.excerpt = '',
+    this.contentHtml = '',
+    this.imageUrl,
+    this.author,
+  });
+
+  final String title;
+  final String link;
+  final NewsSource source;
+  final DateTime? published;
+
+  /// Short plain-text teaser from the feed (description / summary).
+  final String excerpt;
+
+  /// Full article HTML if the feed ships it (content:encoded / atom content).
+  final String contentHtml;
+  final String? imageUrl;
+  final String? author;
+
+  /// The link is unique enough to identify an article across refreshes.
+  String get id => link;
+}

lib/models/briefing.dart

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+/// 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? ?? '',
+      );
+}

lib/models/news_source.dart

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+enum SourceLanguage {
+  de('Deutsch', '🇩🇪'),
+  en('English', '🇬🇧');
+
+  const SourceLanguage(this.label, this.flag);
+
+  final String label;
+  final String flag;
+}
+
+class NewsSource {
+  const NewsSource({
+    required this.id,
+    required this.name,
+    required this.feedUrl,
+    required this.homepage,
+    required this.language,
+    this.description = '',
+    this.enabledByDefault = false,
+    this.isCustom = false,
+    this.checkPaywallOnPage = false,
+  });
+
+  final String id;
+  final String name;
+  final String feedUrl;
+  final String homepage;
+  final SourceLanguage language;
+  final String description;
+  final bool enabledByDefault;
+  final bool isCustom;
+
+  /// Paid articles are only marked inside the page (schema.org), not in the
+  /// feed, so each new article page is checked once.
+  final bool checkPaywallOnPage;
+
+  Map<String, dynamic> toJson() => {
+        'id': id,
+        'name': name,
+        'feedUrl': feedUrl,
+        'homepage': homepage,
+        'language': language.name,
+        'description': description,
+      };
+
+  factory NewsSource.custom(Map<String, dynamic> json) => NewsSource(
+        id: json['id'] as String,
+        name: json['name'] as String,
+        feedUrl: json['feedUrl'] as String,
+        homepage: json['homepage'] as String? ?? '',
+        language: SourceLanguage.values.byName(json['language'] as String? ?? 'en'),
+        description: json['description'] as String? ?? '',
+        isCustom: true,
+      );
+}