reworked developer tools with diagnostics, storage viewers and release-capable debug overlays

lib/main.dart

@@ -7,6 +7,7 @@ import 'package:firebase_core/firebase_core.dart';
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart' show timeDilation;
 import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
@@ -55,6 +56,7 @@ import 'view/login/login.dart';
 import 'view/login/post_login_splash.dart';
 import 'widget/avatar_disk_cache.dart';
 import 'widget/breaker/breaker.dart';
+import 'widget/debug/debug_stats_overlay.dart';
 import 'widget/downloads/download_tray.dart';
 import 'widget/emergency/emergency_notice_gate.dart';
 import 'widget_data/widget_sync.dart';
@@ -384,10 +386,11 @@ class _MainState extends State<Main> {
         notificationsEnabled: settings.notificationSettings.enabled,
         showPerformanceOverlay:
             settings.devToolsSettings.showPerformanceOverlay,
-        checkerboardOffscreenLayers:
-            settings.devToolsSettings.checkerboardOffscreenLayers,
-        checkerboardRasterCacheImages:
-            settings.devToolsSettings.checkerboardRasterCacheImages,
+        showSemanticsDebugger: settings.devToolsSettings.showSemanticsDebugger,
+        showFrameStats: settings.devToolsSettings.showFrameStats,
+        showMemoryStats: settings.devToolsSettings.showMemoryStats,
+        slowAnimations: settings.devToolsSettings.slowAnimations,
+        textScaleOverride: settings.devToolsSettings.textScaleOverride,
       ),
       builder: (context, root) {
         // Keep the MC dio singleton aligned with the currently selected
@@ -403,10 +406,10 @@ class _MainState extends State<Main> {
             root.notificationsEnabled,
           ),
         );
+        timeDilation = root.slowAnimations ? 5.0 : 1.0;
         return MaterialApp(
           showPerformanceOverlay: root.showPerformanceOverlay,
-          checkerboardOffscreenLayers: root.checkerboardOffscreenLayers,
-          checkerboardRasterCacheImages: root.checkerboardRasterCacheImages,
+          showSemanticsDebugger: root.showSemanticsDebugger,
           debugShowCheckedModeBanner: false,
           navigatorKey: AppRoutes.rootNavigatorKey,
           // Used by ChatView.didPopNext to reclaim the global ChatBloc.
@@ -428,13 +431,28 @@ class _MainState extends State<Main> {
           // expose the layer below the topmost Scaffold; without this
           // the dark Material default shows through and the user sees a
           // black flash.
-          builder: (context, child) => ColoredBox(
-            color: LightAppTheme.marianumRed,
-            // Downloads tray mounted ABOVE the navigator so its chip floats over
-            // every route (folder views, chat, viewer are full-page pushes that
-            // would otherwise cover it).
-            child: DownloadTrayHost(child: child ?? const SizedBox.shrink()),
-          ),
+          builder: (context, child) {
+            Widget app = ColoredBox(
+              color: LightAppTheme.marianumRed,
+              // Downloads tray mounted ABOVE the navigator so its chip floats
+              // over every route (folder views, chat, viewer are full-page
+              // pushes that would otherwise cover it).
+              child: DownloadTrayHost(child: child ?? const SizedBox.shrink()),
+            );
+            final scale = root.textScaleOverride;
+            if (scale > 0) {
+              app = MediaQuery.withClampedTextScaling(
+                minScaleFactor: scale,
+                maxScaleFactor: scale,
+                child: app,
+              );
+            }
+            return DebugStatsOverlay(
+              showFrameStats: root.showFrameStats,
+              showMemoryStats: root.showMemoryStats,
+              child: app,
+            );
+          },
           home: EmergencyNoticeGate(
             child: LoaderOverlay(
               child: Breaker(
@@ -549,6 +567,9 @@ typedef _RootSettings = ({
   String mcBaseUrl,
   bool notificationsEnabled,
   bool showPerformanceOverlay,
-  bool checkerboardOffscreenLayers,
-  bool checkerboardRasterCacheImages,
+  bool showSemanticsDebugger,
+  bool showFrameStats,
+  bool showMemoryStats,
+  bool slowAnimations,
+  double textScaleOverride,
 });