simplified code across the app and consolidated duplicated helpers

lib/state/app/modules/app_modules.dart

@@ -177,9 +177,7 @@ class AppModule {
     for (final missing in Modules.values) {
       if (!seen.add(missing)) continue;
       var insertAt = 0;
-      for (final predecessor in Modules.values.takeWhile(
-        (m) => m != missing,
-      )) {
+      for (final predecessor in Modules.values.takeWhile((m) => m != missing)) {
         final pos = order.indexOf(predecessor);
         if (pos >= insertAt) insertAt = pos + 1;
       }
@@ -231,33 +229,26 @@ class AppModule {
   static const int minBottomBarSlots = 3;
   static const int maxBottomBarSlots = 5;
 
-  static int resolveBottomBarSlotCount(BuildContext context) {
+  static int _slotCount(BuildContext context, int available) {
     final settings = context.read<SettingsCubit>().val().modulesSettings;
-    final available = modules(context).length;
-
-    int desired;
-    if (settings.autoFillBottomBar) {
-      // 4 content tabs so the bar shows 5 entries including "Mehr" — enough
-      // for the Ticker module without pushing "Dateien" into the overflow.
-      desired = 4;
-    } else {
-      desired = settings.fixedBottomBarSlots;
-    }
-
-    desired = desired.clamp(minBottomBarSlots, maxBottomBarSlots);
-    return desired.clamp(0, available);
+    // 4 content tabs so the bar shows 5 entries including "Mehr" — enough
+    // for the Ticker module without pushing "Dateien" into the overflow.
+    final desired = settings.autoFillBottomBar
+        ? 4
+        : settings.fixedBottomBarSlots;
+    return desired
+        .clamp(minBottomBarSlots, maxBottomBarSlots)
+        .clamp(0, available);
   }
 
   static List<AppModule> getBottomBarModules(BuildContext context) {
     final all = modules(context).values.toList();
-    final slots = resolveBottomBarSlotCount(context);
-    return all.take(slots).toList();
+    return all.take(_slotCount(context, all.length)).toList();
   }
 
   static List<AppModule> getOverhangModules(BuildContext context) {
     final all = modules(context).values.toList();
-    final slots = resolveBottomBarSlotCount(context);
-    return all.skip(slots).toList();
+    return all.skip(_slotCount(context, all.length)).toList();
   }
 
   Widget toListTile(
@@ -290,10 +281,7 @@ class AppModule {
         : const Icon(Icons.arrow_right),
   );
 
-  PersistentTabConfig toBottomTab(
-    BuildContext context, {
-    Widget Function(IconData icon)? iconBuilder,
-  }) => PersistentTabConfig(
+  PersistentTabConfig toBottomTab(BuildContext context) => PersistentTabConfig(
     screen: Breaker(breaker: breakerArea, child: create()),
     item: ItemConfig(
       activeForegroundColor: Theme.of(context).primaryColor,