feat(ui): scope, freshness and jurist-review badges + live empty-state

Adds three dark-first chip badges in the TierBadge pattern:
- Jurisdiction (Berlin/DE/EU/International) — derived from the ELI,
  surfaced on the norms list, detail header and heatmap chips/hover.
- Freshness (aktuell/geaendert/ungeprueft) — flags norms amended
  upstream (standDate + sourceSha256); renders only when stale.
- Jurist review — marks evaluations a trusted jurist has confirmed
  (optional; the figure stands on its own).
Models gain Jurisdiction/Freshness enums, Norm.freshness/supersededNote
and Evaluation.reviewedBy/reviewedAt; HubRepository parses them from
the flow bag (ELI fallback). HeatmapPage shows a real empty-state
(hub-down vs no-evaluations) instead of a blank plot, and connect()
no longer throws on a failed probe.

Signed-off-by: flemming-it <sf@flemming.it>

app/lib/widgets/freshness_badge.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/material.dart';
+
+import '../data/models.dart';
+import '../theme/reclaim_tokens.dart';
+
+/// Freshness badge — flags when a norm version is stale relative to
+/// the published source (amended upstream) or hasn't been reconciled.
+/// By design it renders NOTHING for [Freshness.current] (the common
+/// case shouldn't add noise) unless [alwaysShow] is set. Same chip
+/// shape as the scope/tier badges.
+class FreshnessBadge extends StatelessWidget {
+  const FreshnessBadge({
+    super.key,
+    required this.freshness,
+    this.note,
+    this.compact = false,
+    this.alwaysShow = false,
+  });
+
+  final Freshness freshness;
+
+  /// Optional plain-text hint of what changed (from Norm.supersededNote).
+  final String? note;
+  final bool compact;
+  final bool alwaysShow;
+
+  @override
+  Widget build(BuildContext context) {
+    if (!freshness.needsBadge && !alwaysShow) {
+      return const SizedBox.shrink();
+    }
+    final t = Theme.of(context).textTheme;
+    final color = switch (freshness) {
+      Freshness.current => ReclaimColors.signal,
+      Freshness.superseded => ReclaimColors.freshSuperseded,
+      Freshness.unknown => ReclaimColors.freshUnknown,
+    };
+    final icon = switch (freshness) {
+      Freshness.current => Icons.check_circle_outline,
+      Freshness.superseded => Icons.history_toggle_off,
+      Freshness.unknown => Icons.help_outline,
+    };
+    final label = compact ? freshness.label : 'Stand: ${freshness.label}';
+    return Tooltip(
+      message: '${freshness.description}'
+          '${note != null && note!.isNotEmpty ? '\n$note' : ''}',
+      child: Container(
+        padding: EdgeInsets.symmetric(
+          horizontal: compact ? 6 : ReclaimSpace.sm,
+          vertical: compact ? 2 : 4,
+        ),
+        decoration: BoxDecoration(
+          color: color.withValues(alpha: 0.18),
+          border: Border.all(color: color.withValues(alpha: 0.55)),
+          borderRadius: const BorderRadius.all(ReclaimRadius.sm),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: compact ? 12 : 14, color: color),
+            const SizedBox(width: 6),
+            Text(
+              label,
+              style: (compact ? t.labelSmall : t.labelLarge)?.copyWith(
+                color: color,
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

app/lib/widgets/heatmap_grid.dart

@@ -267,7 +267,8 @@ class _HeatmapPainter extends CustomPainter {
       );
       _drawText(
         canvas,
-        'Tier: ${e.tierLowest.short}   Klick → Detail',
+        'Bereich: ${e.norm.jurisdiction.short}   '
+            'Tier: ${e.tierLowest.short}   Klick → Detail',
         box.topLeft + const Offset(10, 44),
         const TextStyle(
           color: mute,

app/lib/widgets/jurisdiction_badge.dart

@@ -0,0 +1,69 @@
+import 'package:flutter/material.dart';
+
+import '../data/models.dart';
+import '../theme/reclaim_tokens.dart';
+
+/// Scope badge — surfaces a norm's Geltungsbereich (Berlin /
+/// Deutschland / EU / International) wherever the norm appears, so
+/// the reader sees at a glance which reform lever a figure speaks
+/// to. Visually mirrors [TierBadge]: a scope glyph + code in a
+/// tinted chip, here with a Material icon instead of a dot.
+class JurisdictionBadge extends StatelessWidget {
+  const JurisdictionBadge({
+    super.key,
+    required this.jurisdiction,
+    this.compact = false,
+  });
+
+  final Jurisdiction jurisdiction;
+  final bool compact;
+
+  @override
+  Widget build(BuildContext context) {
+    final t = Theme.of(context).textTheme;
+    final color = switch (jurisdiction) {
+      Jurisdiction.berlin => ReclaimColors.scopeBerlin,
+      Jurisdiction.deutschland => ReclaimColors.scopeDeutschland,
+      Jurisdiction.eu => ReclaimColors.scopeEu,
+      Jurisdiction.international => ReclaimColors.scopeInternational,
+    };
+    final icon = switch (jurisdiction) {
+      Jurisdiction.berlin => Icons.location_city_outlined,
+      Jurisdiction.deutschland => Icons.flag_outlined,
+      Jurisdiction.eu => Icons.star_outline_rounded,
+      Jurisdiction.international => Icons.public,
+    };
+    final label = compact
+        ? jurisdiction.short
+        : '${jurisdiction.short} · ${jurisdiction.label}';
+    return Tooltip(
+      message: 'Geltungsbereich: ${jurisdiction.label} '
+          '(${jurisdiction.level}).\n${jurisdiction.reformLever}.',
+      child: Container(
+        padding: EdgeInsets.symmetric(
+          horizontal: compact ? 6 : ReclaimSpace.sm,
+          vertical: compact ? 2 : 4,
+        ),
+        decoration: BoxDecoration(
+          color: color.withValues(alpha: 0.18),
+          border: Border.all(color: color.withValues(alpha: 0.55)),
+          borderRadius: const BorderRadius.all(ReclaimRadius.sm),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: compact ? 12 : 14, color: color),
+            const SizedBox(width: 6),
+            Text(
+              label,
+              style: (compact ? t.labelSmall : t.labelLarge)?.copyWith(
+                color: color,
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

app/lib/widgets/review_badge.dart

@@ -0,0 +1,77 @@
+import 'package:flutter/material.dart';
+
+import '../data/models.dart';
+import '../theme/reclaim_tokens.dart';
+
+/// Review badge — marks an evaluation a trusted jurist has confirmed
+/// (signed off via the hub approval). Jurist review is OPTIONAL: an
+/// evaluation stands on its own; this only adds the "bestätigt" mark.
+/// Renders a confirm-green check when reviewed; renders the muted
+/// "ungeprüft" state only when [showUnreviewed] is set (otherwise
+/// nothing, to keep unreviewed rows clean).
+class ReviewBadge extends StatelessWidget {
+  const ReviewBadge({
+    super.key,
+    required this.evaluation,
+    this.compact = false,
+    this.showUnreviewed = false,
+  });
+
+  final Evaluation evaluation;
+  final bool compact;
+  final bool showUnreviewed;
+
+  @override
+  Widget build(BuildContext context) {
+    final reviewed = evaluation.isReviewed;
+    if (!reviewed && !showUnreviewed) return const SizedBox.shrink();
+
+    final t = Theme.of(context).textTheme;
+    final color =
+        reviewed ? ReclaimColors.reviewConfirmed : ReclaimColors.mute;
+    final icon = reviewed
+        ? Icons.verified_outlined
+        : Icons.radio_button_unchecked;
+    final label = reviewed
+        ? (compact ? 'geprüft' : 'Jurist-geprüft')
+        : (compact ? 'offen' : 'ungeprüft');
+    final tip = reviewed
+        ? 'Bestätigt von ${evaluation.reviewedBy}'
+            '${evaluation.reviewedAt != null ? ' am ${_d(evaluation.reviewedAt!)}' : ''}.\n'
+            'Jurist-Review ist optional — es bestätigt die Auswertung, '
+            'ist aber keine Voraussetzung.'
+        : 'Noch von keinem Juristen bestätigt. Die Auswertung gilt '
+            'trotzdem (Review ist optional).';
+    return Tooltip(
+      message: tip,
+      child: Container(
+        padding: EdgeInsets.symmetric(
+          horizontal: compact ? 6 : ReclaimSpace.sm,
+          vertical: compact ? 2 : 4,
+        ),
+        decoration: BoxDecoration(
+          color: color.withValues(alpha: 0.18),
+          border: Border.all(color: color.withValues(alpha: 0.55)),
+          borderRadius: const BorderRadius.all(ReclaimRadius.sm),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(icon, size: compact ? 12 : 14, color: color),
+            const SizedBox(width: 6),
+            Text(
+              label,
+              style: (compact ? t.labelSmall : t.labelLarge)?.copyWith(
+                color: color,
+                fontWeight: FontWeight.w600,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  static String _d(DateTime d) =>
+      '${d.day.toString().padLeft(2, '0')}.${d.month.toString().padLeft(2, '0')}.${d.year}';
+}