feat(brand): rename product to Recl∆Im (Reclaim) across app, bundle, docs

Recl∆Im — the F∆I product line for Pflicht-basierte
Wirkungsanalyse und Reform-Vorschlags-Pipelines. Replaces the
working title 'Law-Heatmap', which described the demo view
rather than the platform. Heatmap, Norms list, Hub view,
Methodik are now four panes of the same Recl∆Im app.

Renames in this commit:

  Flutter package      lawheatmap_app   -> reclaim_app
  macOS bundle id      ai.flemming.lawheatmapApp -> ai.flemming.reclaim
  macOS PRODUCT_NAME   lawheatmap_app   -> reclaim_app
  Theme tokens         LawHeatmapColors/Space/Radius/Typography/Theme
                       -> Reclaim*
  Surface card         LawHeatmapCard   -> ReclaimCard
  Top-level widget     LawHeatmapApp    -> ReclaimApp
  Theme files          lawheatmap_theme.dart/lawheatmap_tokens.dart
                       -> reclaim_theme.dart/reclaim_tokens.dart
  Widget file          lawheatmap_card.dart -> reclaim_card.dart
  Build script         build-macos.sh paths and headline string
  Docs                 MACHBARKEITSSTUDIE.md, METHODIK.md, RUN.md,
                       app/README.md, flow YAML
  UI strings           'F∆I Law-Heatmap' / 'Law-Heatmap'
                       -> 'Recl∆Im' / 'Recl∆Im (F∆I)' for vendor-
                       prefixed contexts

flutter analyze: clean. flutter test: 2/2 passing.

The local working directory stays fai_lawheatmap/ for now —
the dir is referenced by the .claude project metadata; renaming
it would break session continuity for no real gain. The Forgejo
repo was renamed via API in the same change-set (fai/lawheatmap
-> fai/reclaim), with the legacy slug serving a redirect
courtesy of Forgejo's built-in rename handling.

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

app/lib/theme/lawheatmap_theme.dart

@@ -1,127 +0,0 @@
-import 'package:flutter/material.dart';
-
-import 'lawheatmap_tokens.dart';
-
-/// ThemeData assembly for the F∆I Law-Heatmap client.
-///
-/// Dark mode is the default (consistent with fai_web's
-/// `color-scheme: dark`). Light mode falls back to the paper
-/// palette for printing/screenshot work.
-class LawHeatmapTheme {
-  LawHeatmapTheme._();
-
-  static ThemeData dark() => _build(Brightness.dark);
-  static ThemeData light() => _build(Brightness.light);
-
-  static ThemeData _build(Brightness brightness) {
-    final isDark = brightness == Brightness.dark;
-    final canvas = isDark ? LawHeatmapColors.ink : LawHeatmapColors.paper;
-    final surface =
-        isDark ? LawHeatmapColors.inkRaised : LawHeatmapColors.paperRaised;
-    final onSurface = isDark
-        ? const Color(0xFFE9E7E2)
-        : const Color(0xFF1A1B1E);
-
-    final colorScheme = ColorScheme(
-      brightness: brightness,
-      primary: LawHeatmapColors.signal,
-      onPrimary: LawHeatmapColors.ink,
-      secondary: LawHeatmapColors.mute,
-      onSecondary: onSurface,
-      error: const Color(0xFFD8723A),
-      onError: LawHeatmapColors.ink,
-      surface: surface,
-      onSurface: onSurface,
-    );
-
-    final textTheme = _textTheme(onSurface);
-
-    return ThemeData(
-      useMaterial3: true,
-      brightness: brightness,
-      colorScheme: colorScheme,
-      scaffoldBackgroundColor: canvas,
-      canvasColor: canvas,
-      fontFamily: LawHeatmapTypography.body,
-      textTheme: textTheme,
-      cardTheme: CardThemeData(
-        color: surface,
-        elevation: 0,
-        margin: EdgeInsets.zero,
-        shape: const RoundedRectangleBorder(
-          borderRadius: BorderRadius.all(LawHeatmapRadius.md),
-          side: BorderSide(color: Color(0x24FFFFFF)),
-        ),
-      ),
-      dividerTheme: DividerThemeData(
-        color: onSurface.withValues(alpha: LawHeatmapColors.hairlineDarkOpacity),
-        thickness: 1,
-        space: 1,
-      ),
-      filledButtonTheme: FilledButtonThemeData(
-        style: FilledButton.styleFrom(
-          backgroundColor: LawHeatmapColors.signal,
-          foregroundColor: LawHeatmapColors.ink,
-          shape: const RoundedRectangleBorder(
-            borderRadius: BorderRadius.all(LawHeatmapRadius.sm),
-          ),
-          textStyle: textTheme.labelLarge,
-          padding: const EdgeInsets.symmetric(
-            horizontal: LawHeatmapSpace.lg,
-            vertical: LawHeatmapSpace.md,
-          ),
-        ),
-      ),
-    );
-  }
-
-  static TextTheme _textTheme(Color onSurface) {
-    const display = LawHeatmapTypography.display;
-    const body = LawHeatmapTypography.body;
-    return TextTheme(
-      displaySmall: TextStyle(
-        fontFamily: display,
-        fontSize: 28,
-        fontWeight: FontWeight.w600,
-        letterSpacing: -0.02 * 28,
-        color: onSurface,
-      ),
-      headlineSmall: TextStyle(
-        fontFamily: display,
-        fontSize: 20,
-        fontWeight: FontWeight.w600,
-        letterSpacing: -0.02 * 20,
-        color: onSurface,
-      ),
-      titleMedium: TextStyle(
-        fontFamily: body,
-        fontSize: 16,
-        fontWeight: FontWeight.w500,
-        color: onSurface,
-      ),
-      bodyLarge: TextStyle(
-        fontFamily: body,
-        fontSize: 14,
-        height: 1.45,
-        color: onSurface,
-      ),
-      labelLarge: TextStyle(
-        fontFamily: body,
-        fontSize: 13,
-        fontWeight: FontWeight.w500,
-        color: onSurface,
-      ),
-      labelSmall: TextStyle(
-        fontFamily: body,
-        fontSize: 11,
-        fontWeight: FontWeight.w500,
-        color: onSurface.withValues(alpha: 0.72),
-      ),
-    );
-  }
-
-  /// Convenience: JetBrains-Mono variant of an existing style for
-  /// technical content (ELI/CELEX, SHA-256, audit-event IDs).
-  static TextStyle mono(TextStyle base) =>
-      base.copyWith(fontFamily: LawHeatmapTypography.mono);
-}