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feat: initial F∆I Law-Heatmap Phase 0 scaffold

Browse source 
First end-to-end-buildable cut of the pflicht-/graph-basierte
Wirkungsanalyse von Rechtsnormen, running on Ch∆In. Demo runs
without external dependencies and without a hub connection so
the methodology + UI stack can be reviewed before any Verbands-
Kooperation or Beirats-Validierung kicks in.

Tree layout

  MACHBARKEITSSTUDIE.md       v0.3 — pflicht-basierte Methodik,
                              4-Tier-Evidenz, 8 law*-Module
                              auf Ch∆In statt der alten F∆I-
                              Plattform.
  RUN.md                      one-page how-to-run.
  flows/durchstich-gewo-14.yaml
                              vertical Phase-0 flow: pull →
                              normalize → duties → citations →
                              cohort → skm → frust → benefit →
                              attribution → system.approval.
  app/                        Flutter macOS client, design
                              language pulled from fai_web
                              (ink #08090A, paper #F4F3EF,
                              petrol signal #2E8F9E). Mock
                              repository ships five fixture
                              norms with real source URLs and a
                              permanent T4 demo-banner so no
                              figure can be mistaken for a
                              validated one.

Module repos (separate, see chain-modules*/):

  text-akoma-normalize, text-deontic-extract, graph-citation-
  extract, text-readability-score, stats-cohort-size, graph-
  shapley-attribution, econ-skm-score, law-benefit-score.

What runs today

  - flutter analyze: 0 issues
  - flutter test: 2/2 (landing + nav-to-shell smoke)
  - flutter build macos (via app/build-macos.sh) and ad-hoc
    codesign, app launches and the Dart VM service comes up
  - native cargo test green on every module
  - cargo build --release --target wasm32-wasip2 produces a
    130 KiB artefact for text-akoma-normalize

What is deliberately mock / stub

  - gRPC wire from the client to a chain serve hub (Repository
    abstraction is in place; live impl is the next step)
  - NKR Bürokratiekosten-Datenbank ingestion (for the canonical
    h-Werte that close out the Engpass per Studie §6.7)
  - DESTATIS GENESIS-API adapter for stats.cohort_size

License: Apache-2.0. Author/contact in MACHBARKEITSSTUDIE.md.
Signed-off-by: flemming-it <sf@flemming.it>
This commit is contained in:
flemming-it 2026-06-18 11:26:28 +02:00
commit 8ee6a294a1
64 changed files with 5641 additions and 0 deletions
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import 'package:flutter/material.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/lawheatmap_card.dart';
class AboutPage extends StatelessWidget {
const AboutPage({super.key});
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return SingleChildScrollView(
padding: const EdgeInsets.all(LawHeatmapSpace.xl),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Methodik & Quellen', style: t.displaySmall),
const SizedBox(height: LawHeatmapSpace.xs),
Text(
'Wie das System bewertet, woran es sich messen lässt.',
style: t.bodyLarge?.copyWith(color: LawHeatmapColors.mute),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
accent: true,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Drei nicht verhandelbare Sätze',
style: t.headlineSmall),
const SizedBox(height: LawHeatmapSpace.md),
Text(
'1. Wir bewerten Pflichten, nicht Gesetze.\n'
'2. Jede Zahl trägt die Tier-Stufe ihres schwächsten '
'Bestandteils. Kein figürlich-runder Wert ohne Quelle.\n'
'3. Kein Output verlässt das System ohne Juristen-Gate '
'(`system.approval@^0`).',
style: t.bodyLarge?.copyWith(height: 1.7),
),
],
),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Methodische Vorbilder', style: t.headlineSmall),
const SizedBox(height: LawHeatmapSpace.sm),
_bullet(t,
'Standardkostenmodell (SKM) — Nationaler Normenkontrollrat. P × F × T × h.'),
_bullet(t,
'Coupette / Katz / Bommarito 2021 — Netzwerkanalyse deutsches Bundesrecht (Graph-Schema).'),
_bullet(t,
'Mercatus QuantGov / RegData — NLP-basierte Pflicht-Klassifikation (must/shall/may).'),
_bullet(t,
'EU Better Regulation Toolbox + REFIT — Cost-Benefit + Evaluations-Methodik.'),
_bullet(t,
'Akoma Ntoso 1.0 (OASIS) + LegalRuleML — XML-Format und Deontik-Datenmodell.'),
_bullet(t,
'UK Better Regulation Framework — Regulatory Policy Committee als unabhängige Letzt-Validierung.'),
],
),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('4-Tier-Evidenz-Modell', style: t.headlineSmall),
const SizedBox(height: LawHeatmapSpace.sm),
_bullet(t,
'T1 — amtlich/peer-reviewed: NKR, DESTATIS, ifo, ZEW, BMWK, SVR, IfM Bonn.'),
_bullet(t,
'T2 — Verbands-Erhebung: DIHK, IHK Berlin, ZDH, BDI Mittelstand, BVMW, HDE.'),
_bullet(t,
'T3 — eigene strukturierte Erhebung (Phase 2/3, DSGVO-anonymisiert).'),
_bullet(t,
'T4 — qualitatives Signal: Petitionen, openPetition, mein.berlin.de, Foren — nur Pain-Indikator.'),
],
),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Plattform', style: t.headlineSmall),
const SizedBox(height: LawHeatmapSpace.sm),
Text(
'Ch∆In v0.16.0 (vormals F∆I-Plattform) — Vendor: '
'F∆I = Flemming.AI. Hub. Module. Flow. Deterministisch, '
'WASM-sandboxed, tamper-evident Audit-Log '
'(CHAIN-EVENT-V3), Apache 2.0, CRA-ready.',
style: t.bodyLarge?.copyWith(height: 1.6),
),
],
),
),
],
),
);
}
Widget _bullet(TextTheme t, String text) {
return Padding(
padding: const EdgeInsets.only(bottom: LawHeatmapSpace.sm),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.only(top: 6, right: 10),
child: Container(
width: 5,
height: 5,
decoration: const BoxDecoration(
color: LawHeatmapColors.signal,
shape: BoxShape.circle,
),
),
),
Expanded(
child: Text(text, style: t.bodyLarge?.copyWith(height: 1.6)),
),
],
),
);
}
}

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import 'package:flutter/material.dart';
import '../data/models.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/demo_banner.dart';
import '../widgets/heatmap_grid.dart';
import '../widgets/lawheatmap_card.dart';
import '../widgets/tier_badge.dart';
import 'norm_detail_page.dart';
class HeatmapPage extends StatefulWidget {
const HeatmapPage({super.key, required this.repository});
final EvaluationRepository repository;
@override
State<HeatmapPage> createState() => _HeatmapPageState();
}
class _HeatmapPageState extends State<HeatmapPage> {
late Future<List<Evaluation>> _future;
@override
void initState() {
super.initState();
_future = widget.repository.list();
}
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Column(
children: [
const DemoBanner(),
Expanded(
child: Padding(
padding: const EdgeInsets.all(LawHeatmapSpace.xl),
child: FutureBuilder<List<Evaluation>>(
future: _future,
builder: (context, snap) {
if (!snap.hasData) {
return const Center(
child: CircularProgressIndicator());
}
final items = snap.data!;
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Heatmap', style: t.displaySmall),
const SizedBox(height: LawHeatmapSpace.xs),
Text(
'X: jährliche Bürokratiekosten (€, log10). '
'Y: Nutzen-Score 0–5. Punktgröße: Betroffenheit. '
'Klick auf einen Punkt → Detail mit Pflichten + Quellen.',
style: t.bodyLarge?.copyWith(
color: LawHeatmapColors.mute,
),
),
const SizedBox(height: LawHeatmapSpace.lg),
Expanded(
child: LawHeatmapCard(
accent: true,
expand: true,
child: HeatmapGrid(
evaluations: items,
onTap: (e) {
Navigator.of(context).push(
MaterialPageRoute(
builder: (_) => NormDetailPage(
repository: widget.repository,
evaluation: e,
),
),
);
},
),
),
),
const SizedBox(height: LawHeatmapSpace.lg),
Wrap(
spacing: LawHeatmapSpace.md,
runSpacing: LawHeatmapSpace.sm,
children: [
for (final e in items)
InkWell(
onTap: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (_) => NormDetailPage(
repository: widget.repository,
evaluation: e,
),
),
);
},
child: LawHeatmapCard(
padding: const EdgeInsets.symmetric(
horizontal: LawHeatmapSpace.md,
vertical: LawHeatmapSpace.sm,
),
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
TierBadge(
tier: e.tierLowest, compact: true),
const SizedBox(
width: LawHeatmapSpace.sm),
Text(
'${e.norm.jurabk} ${e.norm.paragraph}',
style: t.labelLarge,
),
],
),
),
),
],
),
],
);
},
),
),
),
],
);
}
}

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import 'package:flutter/material.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/lawheatmap_card.dart';
class HubStatusPage extends StatelessWidget {
const HubStatusPage({super.key, required this.repository});
final EvaluationRepository repository;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return SingleChildScrollView(
padding: const EdgeInsets.all(LawHeatmapSpace.xl),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Ch∆In Hub', style: t.displaySmall),
const SizedBox(height: LawHeatmapSpace.xs),
Text(
'Status der Verbindung zum lokalen Hub und des Audit-Logs.',
style: t.bodyLarge?.copyWith(color: LawHeatmapColors.mute),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
accent: true,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_row('Modus', repository.mode.toUpperCase(), t),
_row('Quelle', repository.hubLabel, t),
_row('gRPC-Endpunkt', '— (Phase-0-Stub)', t),
_row('Audit-DB', '~/.chain/chain.db (geplant)', t),
_row('Hash-Tag', 'CHAIN-EVENT-V3', t),
],
),
),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Geplante Live-Anbindung', style: t.headlineSmall),
const SizedBox(height: LawHeatmapSpace.sm),
Text(
'1. `chain serve` startet lokal auf Port 50051.\n'
'2. Diese App liest `~/.chain/hub-auth-token` und '
'verbindet via gRPC.\n'
'3. Capability `text.akoma_normalize@^0` muss '
'installiert sein (`chain install text.akoma_normalize`).\n'
'4. Pilot-Flow `flows/durchstich-gewo-14.yaml` läuft '
'gegen GewO §14.\n'
'5. Jedes step.completed-Event landet im Audit-Log; '
'die Repository-Implementierung tauscht von MockRepository '
'auf HubRepository (gleiches Interface, kein UI-Wechsel).',
style: t.bodyLarge?.copyWith(
height: 1.6,
),
),
],
),
),
],
),
);
}
Widget _row(String label, String value, TextTheme t) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 4),
child: Row(
children: [
SizedBox(
width: 160,
child: Text(label,
style: t.labelLarge
?.copyWith(color: LawHeatmapColors.mute)),
),
Expanded(
child: Text(value,
style: t.bodyLarge
?.copyWith(fontFamily: LawHeatmapTypography.mono)),
),
],
),
);
}
}

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import 'package:flutter/material.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_theme.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/delta_mark.dart';
import 'shell_page.dart';
/// First-run landing: brand mark, one-line claim, "enter app" CTA.
/// Mock-mode bypasses Hub connect; the live wire lands in week 1.
class LandingPage extends StatelessWidget {
const LandingPage({super.key, required this.repository});
final EvaluationRepository repository;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Scaffold(
body: SafeArea(
child: Center(
child: ConstrainedBox(
constraints: const BoxConstraints(maxWidth: 720),
child: Padding(
padding: const EdgeInsets.symmetric(
horizontal: LawHeatmapSpace.xxl,
vertical: LawHeatmapSpace.xxxl,
),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const DeltaMark(size: 96),
const SizedBox(height: LawHeatmapSpace.xxl),
Text('F∆I Law-Heatmap', style: t.displaySmall),
const SizedBox(height: LawHeatmapSpace.sm),
Text(
'Pflicht-basierte Wirkungsanalyse von Rechtsnormen — '
'auf Ch∆In, mit Quellen-Audit by construction.',
style: t.bodyLarge
?.copyWith(color: LawHeatmapColors.mute),
),
const SizedBox(height: LawHeatmapSpace.xxl),
Wrap(
crossAxisAlignment: WrapCrossAlignment.center,
spacing: LawHeatmapSpace.md,
runSpacing: LawHeatmapSpace.sm,
children: [
FilledButton.icon(
onPressed: () {
Navigator.of(context).pushReplacement(
MaterialPageRoute(
builder: (_) =>
ShellPage(repository: repository),
),
);
},
icon: const Icon(Icons.east),
label: const Text('App öffnen (Demo-Modus)'),
),
Text(
'Demo: 5 Pilot-Normen, ohne Hub-Verbindung',
style: t.labelSmall?.copyWith(
color: LawHeatmapColors.mute,
),
),
],
),
const SizedBox(height: LawHeatmapSpace.xl),
Text(
'v0.1.0 · Phase 0 · Mock-Modus · '
'Live-Hub-Anbindung folgt in Woche 1',
style: LawHeatmapTheme.mono(
t.labelSmall ?? const TextStyle(),
).copyWith(color: LawHeatmapColors.mute),
),
],
),
),
),
),
),
);
}
}

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import 'package:flutter/material.dart';
import '../data/models.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/demo_banner.dart';
import '../widgets/evidence_sidebar.dart';
import '../widgets/lawheatmap_card.dart';
import '../widgets/tier_badge.dart';
class NormDetailPage extends StatelessWidget {
const NormDetailPage({
super.key,
required this.repository,
required this.evaluation,
});
final EvaluationRepository repository;
final Evaluation evaluation;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
final e = evaluation;
return Scaffold(
appBar: AppBar(
title: Text('${e.norm.jurabk} ${e.norm.paragraph}'),
),
body: Column(
children: [
const DemoBanner(),
Expanded(
child: SingleChildScrollView(
padding: const EdgeInsets.all(LawHeatmapSpace.xl),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
flex: 3,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(e.norm.title,
style: t.displaySmall),
const SizedBox(height: 4),
SelectableText(
e.norm.eli,
style: t.bodyLarge?.copyWith(
fontFamily:
LawHeatmapTypography.mono,
color: LawHeatmapColors.mute,
),
),
],
),
),
TierBadge(tier: e.tierLowest),
],
),
const SizedBox(height: LawHeatmapSpace.lg),
_MetricsRow(e: e),
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Pflichten',
style: t.headlineSmall),
const SizedBox(
height: LawHeatmapSpace.sm),
Text(
'Atomare deontische Aussagen, extrahiert '
'aus dem Norm-Text (Phase 1: regex + LLM-'
'Vorschlag, Juristen-Review obligatorisch).',
style: t.labelSmall?.copyWith(
color: LawHeatmapColors.mute),
),
const SizedBox(
height: LawHeatmapSpace.md),
for (final d in e.duties)
_DutyTile(duty: d),
],
),
),
if (e.notes != null) ...[
const SizedBox(height: LawHeatmapSpace.lg),
LawHeatmapCard(
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text('Methodik-Notiz',
style: t.headlineSmall),
const SizedBox(
height: LawHeatmapSpace.sm),
Text(e.notes!, style: t.bodyLarge),
],
),
),
],
],
),
),
const SizedBox(width: LawHeatmapSpace.xl),
SizedBox(
width: 340,
child: EvidenceSidebar(evaluation: e),
),
],
),
),
),
],
),
);
}
}
class _MetricsRow extends StatelessWidget {
const _MetricsRow({required this.e});
final Evaluation e;
@override
Widget build(BuildContext context) {
return Row(
children: [
_MetricBox(
label: 'Schaden',
value: _eur(e.skmEurPerYear),
sub: 'SKM P×F×T×h',
),
const SizedBox(width: LawHeatmapSpace.md),
_MetricBox(
label: 'Nutzen',
value: '${e.benefitScore.toStringAsFixed(1)} / 5',
sub: '7-dim. Score',
),
const SizedBox(width: LawHeatmapSpace.md),
_MetricBox(
label: 'Betroffene',
value: _kmu(e.affectedCount),
sub: 'DESTATIS',
),
const SizedBox(width: LawHeatmapSpace.md),
_MetricBox(
label: 'Frust',
value: '${e.frustScore.toStringAsFixed(1)} / 10',
sub: 'Lesbarkeit + Tiefe',
),
],
);
}
static String _eur(double v) {
if (v >= 1e9) return '${(v / 1e9).toStringAsFixed(2)} Mrd €';
if (v >= 1e6) return '${(v / 1e6).toStringAsFixed(1)} Mio €';
if (v >= 1e3) return '${(v / 1e3).toStringAsFixed(0)} k €';
return '${v.toStringAsFixed(0)} €';
}
static String _kmu(int n) {
if (n >= 1_000_000) return '${(n / 1e6).toStringAsFixed(1)} Mio';
if (n >= 1_000) return '${(n / 1e3).toStringAsFixed(0)} k';
return n.toString();
}
}
class _MetricBox extends StatelessWidget {
const _MetricBox({
required this.label,
required this.value,
required this.sub,
});
final String label;
final String value;
final String sub;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Expanded(
child: LawHeatmapCard(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(label,
style: t.labelSmall
?.copyWith(color: LawHeatmapColors.mute)),
const SizedBox(height: 4),
Text(value, style: t.displaySmall),
const SizedBox(height: 4),
Text(sub,
style: t.labelSmall
?.copyWith(color: LawHeatmapColors.mute)),
],
),
),
);
}
}
class _DutyTile extends StatelessWidget {
const _DutyTile({required this.duty});
final Duty duty;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Padding(
padding: const EdgeInsets.only(bottom: LawHeatmapSpace.md),
child: Container(
padding: const EdgeInsets.all(LawHeatmapSpace.md),
decoration: BoxDecoration(
border: Border.all(
color: Theme.of(context)
.colorScheme
.onSurface
.withValues(alpha: 0.12)),
borderRadius: const BorderRadius.all(LawHeatmapRadius.sm),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(children: [
Container(
padding: const EdgeInsets.symmetric(
horizontal: 6, vertical: 2),
decoration: BoxDecoration(
color: LawHeatmapColors.signal.withValues(alpha: 0.18),
borderRadius:
const BorderRadius.all(LawHeatmapRadius.sm),
),
child: Text(
duty.modality,
style: t.labelSmall?.copyWith(
color: LawHeatmapColors.signal,
fontWeight: FontWeight.w600,
),
),
),
const SizedBox(width: LawHeatmapSpace.sm),
Text(duty.sourceNorm,
style: t.labelSmall?.copyWith(
fontFamily: LawHeatmapTypography.mono,
color: LawHeatmapColors.mute,
)),
]),
const SizedBox(height: LawHeatmapSpace.sm),
Text(duty.action, style: t.bodyLarge),
const SizedBox(height: 4),
Text(
'Adressat: ${duty.addressee} · '
'Frequenz: ${duty.frequency}'
'${duty.authority != null ? " · Behörde: ${duty.authority}" : ""}'
'${duty.consequence != null ? " · Sanktion: ${duty.consequence}" : ""}',
style: t.labelSmall?.copyWith(color: LawHeatmapColors.mute),
),
],
),
),
);
}
}

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import 'package:flutter/material.dart';
import '../data/models.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/demo_banner.dart';
import '../widgets/lawheatmap_card.dart';
import '../widgets/tier_badge.dart';
import 'norm_detail_page.dart';
class NormsListPage extends StatelessWidget {
const NormsListPage({super.key, required this.repository});
final EvaluationRepository repository;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Column(
children: [
const DemoBanner(),
Expanded(
child: SingleChildScrollView(
padding: const EdgeInsets.all(LawHeatmapSpace.xl),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Normen-Pilotkorpus', style: t.displaySmall),
const SizedBox(height: LawHeatmapSpace.xs),
Text(
'5 Normen für den vertikalen Durchstich. '
'Korpus erweiterbar in Phase 1.',
style: t.bodyLarge?.copyWith(
color: LawHeatmapColors.mute,
),
),
const SizedBox(height: LawHeatmapSpace.lg),
FutureBuilder<List<Evaluation>>(
future: repository.list(),
builder: (context, snap) {
if (!snap.hasData) {
return const Center(
child: CircularProgressIndicator());
}
return Column(
children: [
for (final e in snap.data!)
Padding(
padding: const EdgeInsets.only(
bottom: LawHeatmapSpace.md),
child: _NormRow(
evaluation: e,
repository: repository,
),
),
],
);
},
),
],
),
),
),
],
);
}
}
class _NormRow extends StatelessWidget {
const _NormRow({required this.evaluation, required this.repository});
final Evaluation evaluation;
final EvaluationRepository repository;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return InkWell(
onTap: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (_) => NormDetailPage(
repository: repository,
evaluation: evaluation,
),
),
);
},
child: LawHeatmapCard(
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
flex: 4,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'${evaluation.norm.jurabk} ${evaluation.norm.paragraph} — ${evaluation.norm.title}',
style: t.titleMedium,
),
const SizedBox(height: 4),
Text(
evaluation.norm.eli,
style: t.labelSmall?.copyWith(
fontFamily: LawHeatmapTypography.mono,
color: LawHeatmapColors.mute,
),
),
],
),
),
const SizedBox(width: LawHeatmapSpace.lg),
Expanded(
child: _MetricColumn(
label: 'Schaden / Jahr',
value: _eur(evaluation.skmEurPerYear),
),
),
Expanded(
child: _MetricColumn(
label: 'Nutzen',
value:
'${evaluation.benefitScore.toStringAsFixed(1)} / 5',
),
),
Expanded(
child: _MetricColumn(
label: 'Betroffene',
value: _kmu(evaluation.affectedCount),
),
),
const SizedBox(width: LawHeatmapSpace.md),
TierBadge(tier: evaluation.tierLowest),
],
),
),
);
}
String _eur(double v) {
if (v >= 1e9) return '${(v / 1e9).toStringAsFixed(2)} Mrd €';
if (v >= 1e6) return '${(v / 1e6).toStringAsFixed(1)} Mio €';
if (v >= 1e3) return '${(v / 1e3).toStringAsFixed(0)} k €';
return '${v.toStringAsFixed(0)} €';
}
String _kmu(int n) {
if (n >= 1_000_000) return '${(n / 1e6).toStringAsFixed(1)} Mio';
if (n >= 1_000) return '${(n / 1e3).toStringAsFixed(0)} k';
return n.toString();
}
}
class _MetricColumn extends StatelessWidget {
const _MetricColumn({required this.label, required this.value});
final String label;
final String value;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
label,
style: t.labelSmall?.copyWith(color: LawHeatmapColors.mute),
),
const SizedBox(height: 2),
Text(value, style: t.titleMedium),
],
);
}
}

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import 'package:flutter/material.dart';
import '../data/repository.dart';
import '../theme/lawheatmap_tokens.dart';
import '../widgets/delta_mark.dart';
import 'about_page.dart';
import 'heatmap_page.dart';
import 'hub_status_page.dart';
import 'norms_list_page.dart';
/// App shell with a NavigationRail. Each rail destination is one
/// page; pages do their own scrolling.
class ShellPage extends StatefulWidget {
const ShellPage({super.key, required this.repository});
final EvaluationRepository repository;
@override
State<ShellPage> createState() => _ShellPageState();
}
class _ShellPageState extends State<ShellPage> {
int _index = 0;
@override
Widget build(BuildContext context) {
final t = Theme.of(context).textTheme;
final pages = <Widget>[
HeatmapPage(repository: widget.repository),
NormsListPage(repository: widget.repository),
HubStatusPage(repository: widget.repository),
const AboutPage(),
];
return Scaffold(
body: Row(
children: [
NavigationRail(
backgroundColor: Theme.of(context).colorScheme.surface,
extended: MediaQuery.of(context).size.width > 1100,
selectedIndex: _index,
onDestinationSelected: (i) => setState(() => _index = i),
leading: Padding(
padding: const EdgeInsets.symmetric(
vertical: LawHeatmapSpace.lg,
horizontal: LawHeatmapSpace.md,
),
child: Column(
children: [
const DeltaMark(size: 36),
const SizedBox(height: LawHeatmapSpace.sm),
Text(
'F∆I',
style: t.labelLarge?.copyWith(
letterSpacing: 2,
color: LawHeatmapColors.signal,
),
),
],
),
),
destinations: const [
NavigationRailDestination(
icon: Icon(Icons.grid_view_outlined),
selectedIcon: Icon(Icons.grid_view),
label: Text('Heatmap'),
),
NavigationRailDestination(
icon: Icon(Icons.list_alt_outlined),
selectedIcon: Icon(Icons.list_alt),
label: Text('Normen'),
),
NavigationRailDestination(
icon: Icon(Icons.hub_outlined),
selectedIcon: Icon(Icons.hub),
label: Text('Hub'),
),
NavigationRailDestination(
icon: Icon(Icons.info_outline),
selectedIcon: Icon(Icons.info),
label: Text('Methodik'),
),
],
),
const VerticalDivider(width: 1),
Expanded(child: pages[_index]),
],
),
);
}
}