feat(studio): de-jargonize, reveal-in-OS, copyable errors, today carousel, AppBar alignment, F∆I window title (v0.34.0)

Sweeping pass against six user reports collected this session.

1. "Capabilities ist nicht deutsch, Chain auch nicht."
   The DE locale still leaked English vocabulary. Replaced
   "Capabilities" → "Fähigkeiten" and "Chain" / "Hash-Chain"
   → "Kette" / "Hash-Kette" everywhere — store search hint,
   recommended-source body, federated toast, doctor summary
   chain row, modules panel summary, MCP / n8n hints, the
   approvals history blurb. Wire-level identifiers
   (`chain.reset`) stay as code.

2. "Bei Fehlern unten muss man die auch ins clipboard
   kopieren können." New `FaiErrorBox` widget: selectable
   monospace block with a small copy-to-clipboard icon
   button that flips to a checkmark for two seconds after
   click. Applied to the Doctor update banner output and
   the Settings channel toast — the two places long
   stderr / stdout lands.

3. "Öffnen bei Log kann es nicht öffnen. Audit-DB auch
   nicht. PID auch nicht."
   Cause: `SystemActions.openInOs` shells out to `open` /
   `xdg-open` on file paths the OS has no default handler
   for (SQLite DB, PID file, log without an .ext that
   binds). New `revealInOs` uses `open -R` on macOS,
   `explorer /select,` on Windows, and the parent
   directory via `xdg-open` on Linux. Doctor's path rows
   carry an `isDirectory` flag that routes through the new
   `openOrReveal` so files reveal in Finder / Explorer
   instead of failing silently.

4. "Oben im Store könnte man diesen Redaktionshinweis auch
   so bauen, dass man mit pfeil nach rechts links auch
   weitere anzeigen kann."
   The Today-Hero became a carousel. Curated fallback
   list grew from one entry to four (public sources, the
   sandbox-by-default permission story, the hash-chained
   audit story, the air-gap-ready single-binary pitch).
   Hero gets prev / next chevrons plus a dot indicator
   when the current snapshot has more than one slide.
   Operator-accepted stories stay single — the carousel
   collapses when there's only one to show.

5. "Ich fände es schöner wenn rechts und links im Store
   die Abstände konsistent sind, das Reload-Symbol rechts
   ist zu weit rechts und Store links auch nicht bündig."
   AppBar now has `titleSpacing: FaiSpace.xl` so the
   title's left edge sits flush with the body's left
   padding (24 dp), and the trailing `SizedBox` after the
   reload icon shrunk so the icon's outer edge meets the
   right edge of the rightmost grid card.

6. "Oben der Titel zeigt fai_studio an, das sollte F∆I
   Studio sein." The OS window title was the
   pubspec-derived "fai_studio". Macos/Linux/Windows
   runners now hard-code "F∆I Studio" (with the U+2206
   triangle escape so the C++ source stays ASCII). macOS
   bundle name and display name lifted out of the
   PRODUCT_NAME variable for the same reason.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/data/system_actions.dart

@@ -39,6 +39,50 @@ class SystemActions {
     }
   }
 
+  /// Reveal [path] in the platform file manager. Works for binary
+  /// files (the SQLite audit DB, the PID file) where `openInOs`
+  /// would fall flat — macOS refuses to "open" a file with no
+  /// registered app. macOS uses `open -R`; Windows
+  /// `explorer /select,`; Linux falls back to opening the parent
+  /// directory because there is no portable reveal-and-highlight.
+  static Future<({bool ok, String stderr})> revealInOs(String path) async {
+    if (path.isEmpty) {
+      return (ok: false, stderr: 'empty path');
+    }
+    try {
+      final ProcessResult r;
+      if (Platform.isMacOS) {
+        r = await Process.run('open', ['-R', path]);
+      } else if (Platform.isWindows) {
+        // /select, requires no space after the comma; explorer
+        // returns 1 even on success, so don't gate on exitCode.
+        r = await Process.run('explorer', ['/select,$path']);
+        return (ok: true, stderr: '');
+      } else {
+        // Linux: open the containing directory in the default
+        // file manager. Best portable approximation.
+        final parent = File(path).parent.path;
+        r = await Process.run('xdg-open', [parent]);
+      }
+      if (r.exitCode == 0) return (ok: true, stderr: '');
+      return (ok: false, stderr: r.stderr.toString().trim());
+    } catch (e) {
+      return (ok: false, stderr: e.toString());
+    }
+  }
+
+  /// Convenience: reveal binary files, open directories /
+  /// text-shaped paths normally. Doctor's path rows use this so
+  /// the operator never has to know which strategy fits which
+  /// kind of file.
+  static Future<({bool ok, String stderr})> openOrReveal(
+    String path, {
+    required bool isDirectory,
+  }) async {
+    if (isDirectory) return openInOs(path);
+    return revealInOs(path);
+  }
+
   /// Run a `fai daemon ...` subcommand and surface the captured
   /// output. Used by Doctor's "Restart daemon" button.
   static Future<({bool ok, String stdout, String stderr})> faiDaemon(

lib/l10n/app_de.arb

@@ -28,6 +28,8 @@
   "buttonOpen": "Öffnen",
   "buttonExplain": "Erklären",
   "buttonReadDocs": "Doku öffnen",
+  "buttonCopy": "In Zwischenablage kopieren",
+  "buttonCopied": "Kopiert",
 
   "settingsTitle": "Hub-Endpunkt",
   "settingsHost": "Host",
@@ -62,7 +64,7 @@
   "n8nAddTooltip": "n8n-Endpunkt hinzufügen",
   "n8nRemoveTooltip": "Endpunkt entfernen",
   "addMcpTitle": "MCP-Server hinzufügen",
-  "addMcpIntro": "Tools, die der Server via `tools/list` anbietet, erscheinen im Store als `mcp.<name>.<tool>`-Capabilities.",
+  "addMcpIntro": "Tools, die der Server via `tools/list` anbietet, erscheinen im Store als `mcp.<name>.<tool>`-Fähigkeiten.",
   "addMcpSuggestionsLabel": "Vorschläge — zum Vorausfüllen klicken",
   "addMcpNameLabel": "Name (keine Punkte)",
   "addMcpNameHint": "filesystem",
@@ -73,7 +75,7 @@
   "addMcpNotesLabel": "Notizen (optional)",
   "addMcpAddButton": "Hinzufügen + Discovery",
   "addN8nTitle": "n8n-Endpunkt hinzufügen",
-  "addN8nIntro": "Aktive Workflows erscheinen im Store als `n8n.<name>.<workflow_slug>`-Capabilities.",
+  "addN8nIntro": "Aktive Workflows erscheinen im Store als `n8n.<name>.<workflow_slug>`-Fähigkeiten.",
   "addN8nNameLabel": "Name (keine Punkte)",
   "addN8nNameHint": "ops",
   "addN8nBaseUrlLabel": "Basis-URL (ohne /api/v1)",
@@ -102,7 +104,7 @@
   "channelsEnableAutostart": "Autostart bei Anmeldung aktivieren",
   "channelsDisableAutostart": "Autostart deaktivieren",
 
-  "storeSearchHint": "Module suchen — Name, Tagline, Tag, Capability…",
+  "storeSearchHint": "Module suchen — Name, Tagline, Tag, Fähigkeit…",
   "storeAskHint": "Was brauchst du? Versuch's mit „ein Modul, das tabellarische Daten liest\" oder tippe einfach einen Begriff.",
   "storeAskSubmit": "Suchen",
   "storeAskAi": "KI fragen",
@@ -187,7 +189,7 @@
   "storeOpenBrowserFailed": "Browser konnte nicht geöffnet werden: {error}",
   "@storeOpenBrowserFailed": { "placeholders": { "error": { "type": "String" } } },
   "storeSectionTags": "Tags",
-  "storeSectionRequiredCapabilities": "Erforderliche Capabilities",
+  "storeSectionRequiredCapabilities": "Erforderliche Fähigkeiten",
   "storeSectionRequiredHostServices": "Erforderliche Host-Dienste",
   "storeSectionScreenshots": "Screenshots",
   "storeSectionDocumentation": "Dokumentation",
@@ -221,19 +223,19 @@
   "storeProvenanceN8n": "n8n · {provider}",
   "@storeProvenanceN8n": { "placeholders": { "provider": { "type": "String" } } },
   "storeRecommendedTitle": "Öffentliche Quelle hinzufügen — ein Klick",
-  "storeRecommendedBody": "Kuratierte MCP-Server über HTTPS erreichbar. Kein Subprozess, kein API-Key, kein Node. Föderierte Capabilities erscheinen sofort im Store.",
+  "storeRecommendedBody": "Kuratierte MCP-Server über HTTPS erreichbar. Kein Subprozess, kein API-Key, kein Node. Föderierte Fähigkeiten erscheinen sofort im Store.",
   "storeRecommendedAddTooltip": "Hinzufügen und entdecken",
   "storeRecommendedAdding": "Wird hinzugefügt…",
   "storeRecommendedDeepWikiTagline": "GitHub-Repo-Doku-Suche (KI-gestützt)",
   "storeRecommendedSemgrepTagline": "Security-Scanning für Code-Schwachstellen",
-  "storeProviderAddedToast": "{name} hinzugefügt — {n} {n, plural, =1{föderierte Capability} other{föderierte Capabilities}}.",
+  "storeProviderAddedToast": "{name} hinzugefügt — {n} {n, plural, =1{föderierte Fähigkeit} other{föderierte Fähigkeiten}}.",
   "@storeProviderAddedToast": {
     "placeholders": {
       "name": { "type": "String" },
       "n": { "type": "int" }
     }
   },
-  "storeProviderAddedZeroToast": "{name} ist eingetragen, aber der Server hat noch keine Capabilities geliefert. Öffne Einstellungen → MCP-Clients, um Discovery erneut zu versuchen oder den Server zu prüfen.",
+  "storeProviderAddedZeroToast": "{name} ist eingetragen, aber der Server hat noch keine Fähigkeiten geliefert. Öffne Einstellungen → MCP-Clients, um Discovery erneut zu versuchen oder den Server zu prüfen.",
   "@storeProviderAddedZeroToast": {
     "placeholders": { "name": { "type": "String" } }
   },
@@ -253,7 +255,7 @@
   "auditFilterStep": "Step",
   "auditFilterModule": "Modul",
   "auditClearLogTooltip": "Protokoll löschen (nur local/dev Kanal)",
-  "auditClearedToast": "{n} Ereignisse auf Kanal „{channel}\" gelöscht. Chain mit Marker neu geseedet.",
+  "auditClearedToast": "{n} Ereignisse auf Kanal „{channel}\" gelöscht. Kette mit Marker neu geseedet.",
   "@auditClearedToast": {
     "placeholders": {
       "n": { "type": "int" },
@@ -276,7 +278,7 @@
   "@auditLiveStatus": { "placeholders": { "n": { "type": "int" } } },
   "auditDisconnected": "getrennt · {error}",
   "@auditDisconnected": { "placeholders": { "error": { "type": "String" } } },
-  "auditHashChainVerified": "Hash-Chain verifiziert",
+  "auditHashChainVerified": "Hash-Kette verifiziert",
   "auditDetailHeader": "DETAIL",
   "auditAskingFull": "Frage an die konfigurierte System-AI läuft…",
   "auditFixLabel": "FIX",
@@ -308,7 +310,7 @@
   "@modulesRecentActivityHint": { "placeholders": { "n": { "type": "int" } } },
   "modulesActivityInstalled": "installiert",
   "modulesActivityUninstalled": "deinstalliert",
-  "modulesCapabilitiesLabel": "Capabilities",
+  "modulesCapabilitiesLabel": "Fähigkeiten",
   "modulesUninstallTitle": "Modul deinstallieren?",
   "modulesUninstallBody": "Entfernt {name} v{version} von diesem Hub. Flows, die es verwenden, schlagen beim nächsten Lauf fehl. Ein `module.uninstalled`-Audit-Event wird festgehalten.",
   "@modulesUninstallBody": {
@@ -329,7 +331,7 @@
   "modulesUninstalling": "Wird deinstalliert…",
   "moduleSheetFailedToLoad": "Laden fehlgeschlagen: {error}",
   "@moduleSheetFailedToLoad": { "placeholders": { "error": { "type": "String" } } },
-  "moduleSheetCapabilities": "Capabilities",
+  "moduleSheetCapabilities": "Fähigkeiten",
   "moduleSheetPermissions": "Deklarierte Berechtigungen",
   "moduleSheetNoPermissions": "(keine — reines Berechnungsmodul)",
 
@@ -381,7 +383,7 @@
   "approvalsRejectFailed": "Ablehnung fehlgeschlagen: {error}",
   "@approvalsRejectFailed": { "placeholders": { "error": { "type": "String" } } },
   "approvalsHistoryEmpty": "Noch kein Verlauf",
-  "approvalsHistoryEmptyHint": "Entschiedene Freigaben (freigegeben / abgelehnt / abgelaufen) erscheinen hier.\nDas Audit-Log enthält den vollständigen hash-chained Datensatz.",
+  "approvalsHistoryEmptyHint": "Entschiedene Freigaben (freigegeben / abgelehnt / abgelaufen) erscheinen hier.\nDas Audit-Log enthält den vollständigen hash-verketteten Datensatz.",
   "approvalsDialogDecided": "entschieden",
   "approvalsDialogCreated": "erstellt",
   "approvalsDialogReason": "Begründung",
@@ -396,10 +398,10 @@
   "doctorSummaryApprovals": "Freigaben",
   "doctorSummaryAudit": "Protokoll",
   "doctorSummaryServices": "Dienste",
-  "doctorSummaryCapabilities": "{n} Capabilities",
+  "doctorSummaryCapabilities": "{n} Fähigkeiten",
   "@doctorSummaryCapabilities": { "placeholders": { "n": { "type": "int" } } },
   "doctorSummaryPending": "offen",
-  "doctorSummaryChain": "{verified}/{total} Chain",
+  "doctorSummaryChain": "{verified}/{total} Kette",
   "@doctorSummaryChain": {
     "placeholders": {
       "verified": { "type": "int" },
@@ -407,7 +409,7 @@
     }
   },
   "doctorSummaryDeclared": "deklariert",
-  "doctorModulesPanelSummary": "{n} Module · {m} Capabilities",
+  "doctorModulesPanelSummary": "{n} Module · {m} Fähigkeiten",
   "@doctorModulesPanelSummary": {
     "placeholders": {
       "n": { "type": "int" },
@@ -428,7 +430,7 @@
   "doctorHostServicesSection": "Host-Dienste",
   "doctorDaemonFilesSection": "Daemon-Dateien",
   "doctorDaemonControlSection": "Daemon-Steuerung",
-  "doctorChainIntact": "Hash-Chain intakt",
+  "doctorChainIntact": "Hash-Kette intakt",
   "doctorChainIntactDetail": "{n} Ereignisse · prev_event_sha256 lückenlos verifiziert",
   "@doctorChainIntactDetail": { "placeholders": { "n": { "type": "int" } } },
   "doctorChainTampered": "Manipulation erkannt",
@@ -491,10 +493,10 @@
   "doctorApplyDone": "Update angewendet. Studio neu starten, um die neue Daemon-Version zu sehen.",
 
   "mcpHeader": "MCP-CLIENTS",
-  "mcpHint": "Externe MCP-Server bringen ihre Tools als `mcp.<server>.<tool>` Capabilities ein. Einmal konfigurieren, im Store sichtbar.",
+  "mcpHint": "Externe MCP-Server bringen ihre Tools als `mcp.<server>.<tool>` Fähigkeiten ein. Einmal konfigurieren, im Store sichtbar.",
   "mcpEmpty": "Keine MCP-Server konfiguriert. + klicken zum Hinzufügen.",
   "n8nHeader": "N8N-ENDPUNKTE",
-  "n8nHint": "Aktive n8n-Workflows erscheinen als `n8n.<endpoint>.<slug>` Capabilities. Einmal konfigurieren, im Store sichtbar.",
+  "n8nHint": "Aktive n8n-Workflows erscheinen als `n8n.<endpoint>.<slug>` Fähigkeiten. Einmal konfigurieren, im Store sichtbar.",
   "n8nEmpty": "Keine n8n-Endpunkte konfiguriert. + klicken zum Hinzufügen.",
 
   "hubUnreachable": "Hub nicht erreichbar",

lib/l10n/app_en.arb

@@ -29,6 +29,8 @@
   "buttonOpen": "Open",
   "buttonExplain": "Explain",
   "buttonReadDocs": "Read docs",
+  "buttonCopy": "Copy to clipboard",
+  "buttonCopied": "Copied",
 
   "settingsTitle": "Hub endpoint",
   "settingsHost": "Host",

lib/l10n/app_localizations.dart

@@ -242,6 +242,18 @@ abstract class AppLocalizations {
   /// **'Read docs'**
   String get buttonReadDocs;
 
+  /// No description provided for @buttonCopy.
+  ///
+  /// In en, this message translates to:
+  /// **'Copy to clipboard'**
+  String get buttonCopy;
+
+  /// No description provided for @buttonCopied.
+  ///
+  /// In en, this message translates to:
+  /// **'Copied'**
+  String get buttonCopied;
+
   /// No description provided for @settingsTitle.
   ///
   /// In en, this message translates to:

lib/l10n/app_localizations_de.dart

@@ -80,6 +80,12 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get buttonReadDocs => 'Doku öffnen';
 
+  @override
+  String get buttonCopy => 'In Zwischenablage kopieren';
+
+  @override
+  String get buttonCopied => 'Kopiert';
+
   @override
   String get settingsTitle => 'Hub-Endpunkt';
 
@@ -193,7 +199,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get addMcpIntro =>
-      'Tools, die der Server via `tools/list` anbietet, erscheinen im Store als `mcp.<name>.<tool>`-Capabilities.';
+      'Tools, die der Server via `tools/list` anbietet, erscheinen im Store als `mcp.<name>.<tool>`-Fähigkeiten.';
 
   @override
   String get addMcpSuggestionsLabel => 'Vorschläge — zum Vorausfüllen klicken';
@@ -227,7 +233,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get addN8nIntro =>
-      'Aktive Workflows erscheinen im Store als `n8n.<name>.<workflow_slug>`-Capabilities.';
+      'Aktive Workflows erscheinen im Store als `n8n.<name>.<workflow_slug>`-Fähigkeiten.';
 
   @override
   String get addN8nNameLabel => 'Name (keine Punkte)';
@@ -304,7 +310,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get storeSearchHint =>
-      'Module suchen — Name, Tagline, Tag, Capability…';
+      'Module suchen — Name, Tagline, Tag, Fähigkeit…';
 
   @override
   String get storeAskHint =>
@@ -502,7 +508,7 @@ class AppLocalizationsDe extends AppLocalizations {
   String get storeSectionTags => 'Tags';
 
   @override
-  String get storeSectionRequiredCapabilities => 'Erforderliche Capabilities';
+  String get storeSectionRequiredCapabilities => 'Erforderliche Fähigkeiten';
 
   @override
   String get storeSectionRequiredHostServices => 'Erforderliche Host-Dienste';
@@ -605,7 +611,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get storeRecommendedBody =>
-      'Kuratierte MCP-Server über HTTPS erreichbar. Kein Subprozess, kein API-Key, kein Node. Föderierte Capabilities erscheinen sofort im Store.';
+      'Kuratierte MCP-Server über HTTPS erreichbar. Kein Subprozess, kein API-Key, kein Node. Föderierte Fähigkeiten erscheinen sofort im Store.';
 
   @override
   String get storeRecommendedAddTooltip => 'Hinzufügen und entdecken';
@@ -626,15 +632,15 @@ class AppLocalizationsDe extends AppLocalizations {
     String _temp0 = intl.Intl.pluralLogic(
       n,
       locale: localeName,
-      other: 'föderierte Capabilities',
+      other: 'föderierte Fähigkeiten',
-      one: 'föderierte Capability',
+      one: 'föderierte Fähigkeit',
     );
     return '$name hinzugefügt — $n $_temp0.';
   }
 
   @override
   String storeProviderAddedZeroToast(String name) {
-    return '$name ist eingetragen, aber der Server hat noch keine Capabilities geliefert. Öffne Einstellungen → MCP-Clients, um Discovery erneut zu versuchen oder den Server zu prüfen.';
+    return '$name ist eingetragen, aber der Server hat noch keine Fähigkeiten geliefert. Öffne Einstellungen → MCP-Clients, um Discovery erneut zu versuchen oder den Server zu prüfen.';
   }
 
   @override
@@ -669,7 +675,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String auditClearedToast(int n, String channel) {
-    return '$n Ereignisse auf Kanal „$channel\" gelöscht. Chain mit Marker neu geseedet.';
+    return '$n Ereignisse auf Kanal „$channel\" gelöscht. Kette mit Marker neu geseedet.';
   }
 
   @override
@@ -723,7 +729,7 @@ class AppLocalizationsDe extends AppLocalizations {
   }
 
   @override
-  String get auditHashChainVerified => 'Hash-Chain verifiziert';
+  String get auditHashChainVerified => 'Hash-Kette verifiziert';
 
   @override
   String get auditDetailHeader => 'DETAIL';
@@ -802,7 +808,7 @@ class AppLocalizationsDe extends AppLocalizations {
   String get modulesActivityUninstalled => 'deinstalliert';
 
   @override
-  String get modulesCapabilitiesLabel => 'Capabilities';
+  String get modulesCapabilitiesLabel => 'Fähigkeiten';
 
   @override
   String get modulesUninstallTitle => 'Modul deinstallieren?';
@@ -831,7 +837,7 @@ class AppLocalizationsDe extends AppLocalizations {
   }
 
   @override
-  String get moduleSheetCapabilities => 'Capabilities';
+  String get moduleSheetCapabilities => 'Fähigkeiten';
 
   @override
   String get moduleSheetPermissions => 'Deklarierte Berechtigungen';
@@ -951,7 +957,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get approvalsHistoryEmptyHint =>
-      'Entschiedene Freigaben (freigegeben / abgelehnt / abgelaufen) erscheinen hier.\nDas Audit-Log enthält den vollständigen hash-chained Datensatz.';
+      'Entschiedene Freigaben (freigegeben / abgelehnt / abgelaufen) erscheinen hier.\nDas Audit-Log enthält den vollständigen hash-verketteten Datensatz.';
 
   @override
   String get approvalsDialogDecided => 'entschieden';
@@ -992,7 +998,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String doctorSummaryCapabilities(int n) {
-    return '$n Capabilities';
+    return '$n Fähigkeiten';
   }
 
   @override
@@ -1000,7 +1006,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String doctorSummaryChain(int verified, int total) {
-    return '$verified/$total Chain';
+    return '$verified/$total Kette';
   }
 
   @override
@@ -1008,7 +1014,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String doctorModulesPanelSummary(int n, int m) {
-    return '$n Module · $m Capabilities';
+    return '$n Module · $m Fähigkeiten';
   }
 
   @override
@@ -1060,7 +1066,7 @@ class AppLocalizationsDe extends AppLocalizations {
   String get doctorDaemonControlSection => 'Daemon-Steuerung';
 
   @override
-  String get doctorChainIntact => 'Hash-Chain intakt';
+  String get doctorChainIntact => 'Hash-Kette intakt';
 
   @override
   String doctorChainIntactDetail(int n) {
@@ -1193,7 +1199,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get mcpHint =>
-      'Externe MCP-Server bringen ihre Tools als `mcp.<server>.<tool>` Capabilities ein. Einmal konfigurieren, im Store sichtbar.';
+      'Externe MCP-Server bringen ihre Tools als `mcp.<server>.<tool>` Fähigkeiten ein. Einmal konfigurieren, im Store sichtbar.';
 
   @override
   String get mcpEmpty =>
@@ -1204,7 +1210,7 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get n8nHint =>
-      'Aktive n8n-Workflows erscheinen als `n8n.<endpoint>.<slug>` Capabilities. Einmal konfigurieren, im Store sichtbar.';
+      'Aktive n8n-Workflows erscheinen als `n8n.<endpoint>.<slug>` Fähigkeiten. Einmal konfigurieren, im Store sichtbar.';
 
   @override
   String get n8nEmpty =>

lib/l10n/app_localizations_en.dart

@@ -80,6 +80,12 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get buttonReadDocs => 'Read docs';
 
+  @override
+  String get buttonCopy => 'Copy to clipboard';
+
+  @override
+  String get buttonCopied => 'Copied';
+
   @override
   String get settingsTitle => 'Hub endpoint';
 

lib/main.dart

@@ -26,7 +26,7 @@ import 'widgets/widgets.dart';
 /// Studio's own build version. Bump on every UI commit so the
 /// running app self-identifies — visible in the sidebar header
 /// and quick-glance proof that you're seeing the current build.
-const String kStudioVersion = '0.33.1';
+const String kStudioVersion = '0.34.0';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();

lib/pages/doctor.dart

@@ -334,13 +334,17 @@ class _DaemonPathsPanel extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final l = AppLocalizations.of(context)!;
-    final entries = <(String, String, IconData)>[
+    // Per-row layout: (label, path, icon, isDirectory). The
-      (l.doctorPathLog, paths.logPath, Icons.description_outlined),
+    // isDirectory bit drives `openOrReveal` so binary files
-      (l.doctorPathConfig, paths.configPath, Icons.settings_outlined),
+    // (the SQLite audit DB, the PID file) reveal in Finder /
-      (l.doctorPathDb, paths.dbPath, Icons.storage_outlined),
+    // Explorer instead of failing the OS "open" handler.
-      (l.doctorPathModules, paths.modulesDir, Icons.extension_outlined),
+    final entries = <(String, String, IconData, bool)>[
-      (l.doctorPathFlows, paths.flowsDir, Icons.account_tree_outlined),
+      (l.doctorPathLog, paths.logPath, Icons.description_outlined, false),
-      (l.doctorPathPid, paths.pidPath, Icons.fingerprint),
+      (l.doctorPathConfig, paths.configPath, Icons.settings_outlined, false),
+      (l.doctorPathDb, paths.dbPath, Icons.storage_outlined, false),
+      (l.doctorPathModules, paths.modulesDir, Icons.extension_outlined, true),
+      (l.doctorPathFlows, paths.flowsDir, Icons.account_tree_outlined, true),
+      (l.doctorPathPid, paths.pidPath, Icons.fingerprint, false),
     ].where((e) => e.$2.isNotEmpty).toList();
 
     if (entries.isEmpty) {
@@ -356,7 +360,13 @@ class _DaemonPathsPanel extends StatelessWidget {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          for (final e in entries) _PathRow(label: e.$1, path: e.$2, icon: e.$3),
+          for (final e in entries)
+            _PathRow(
+              label: e.$1,
+              path: e.$2,
+              icon: e.$3,
+              isDirectory: e.$4,
+            ),
         ],
       ),
     );
@@ -367,8 +377,14 @@ class _PathRow extends StatelessWidget {
   final String label;
   final String path;
   final IconData icon;
+  final bool isDirectory;
 
-  const _PathRow({required this.label, required this.path, required this.icon});
+  const _PathRow({
+    required this.label,
+    required this.path,
+    required this.icon,
+    required this.isDirectory,
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -400,7 +416,10 @@ class _PathRow extends StatelessWidget {
           const SizedBox(width: FaiSpace.sm),
           OutlinedButton.icon(
             onPressed: () async {
-              final r = await SystemActions.openInOs(path);
+              final r = await SystemActions.openOrReveal(
+                path,
+                isDirectory: isDirectory,
+              );
               if (!context.mounted) return;
               if (!r.ok) {
                 final l = AppLocalizations.of(context)!;
@@ -409,7 +428,10 @@ class _PathRow extends StatelessWidget {
                 );
               }
             },
-            icon: const Icon(Icons.open_in_new, size: 14),
+            icon: Icon(
+              isDirectory ? Icons.folder_open : Icons.open_in_new,
+              size: 14,
+            ),
             label: Text(AppLocalizations.of(context)!.buttonOpen),
             style: OutlinedButton.styleFrom(
               visualDensity: VisualDensity.compact,
@@ -895,22 +917,7 @@ class _UpdateBannerState extends State<_UpdateBanner> {
           ),
           if (_applyOutput != null) ...[
             const SizedBox(height: FaiSpace.md),
-            Container(
+            FaiErrorBox(text: _applyOutput!, maxHeight: 240),
-              width: double.infinity,
-              padding: const EdgeInsets.all(FaiSpace.sm),
-              decoration: BoxDecoration(
-                color: theme.colorScheme.surfaceContainerHigh,
-                borderRadius: BorderRadius.circular(FaiRadius.sm),
-                border: Border.all(color: theme.colorScheme.outlineVariant),
-              ),
-              child: SelectableText(
-                _applyOutput!,
-                style: FaiTheme.mono(
-                  size: 11,
-                  color: theme.colorScheme.onSurface,
-                ),
-              ),
-            ),
           ],
         ],
       ),

lib/pages/store.dart

@@ -42,11 +42,24 @@ class _StorePageState extends State<StorePage> {
   /// session. Not persisted — the next Studio launch shows it
   /// again so a release-bumped story has a chance to be seen.
   bool _todayDismissed = false;
-  /// Loaded once at init from `~/.fai/today/active.yaml`; falls
+  /// The carousel of stories rendered in the hero. When an
-  /// back to the compiled-in story when the pipeline hasn't
+  /// operator-accepted story exists at `~/.fai/today/active.yaml`,
-  /// produced an accepted candidate yet.
+  /// it is the only entry (carousel collapses to a single
-  late final TodayStoryData _todayStory =
+  /// slide). Otherwise the curated fallback list rotates.
-      TodayStoryLoader.loadOrFallback(_kFallbackTodayStory);
+  late final List<TodayStoryData> _todayStories = (() {
+    final loaded =
+        TodayStoryLoader.loadOrFallback(_kFallbackTodayStories.first);
+    // When the loader fell back to the const, it returned the
+    // first entry of our list — surface the whole list so the
+    // operator can browse. Otherwise the loader produced a real
+    // accepted story and we honour it as the only item.
+    if (identical(loaded, _kFallbackTodayStories.first)) {
+      return _kFallbackTodayStories;
+    }
+    return <TodayStoryData>[loaded];
+  })();
+  /// Carousel index. Wraps around modulo `_todayStories.length`.
+  int _todayIndex = 0;
   late Future<List<StoreItem>> _future;
 
   // ── AI search state ──────────────────────────────────────
@@ -151,11 +164,13 @@ class _StorePageState extends State<StorePage> {
     return Scaffold(
       backgroundColor: theme.scaffoldBackgroundColor,
       appBar: AppBar(
+        // titleSpacing matches the body's horizontal padding
+        // (FaiSpace.xl == 24) so the title's left edge sits
+        // flush with the cards below. Default 16 left a 8-px
+        // gap that read as a misaligned heading.
+        titleSpacing: FaiSpace.xl,
         title: Text(l.searchGroupStore),
         actions: [
-          // Category dropdown and Filter button live in the
-          // toolbar so the body stays uncluttered. Both refresh
-          // off the current store snapshot via FutureBuilder.
           FutureBuilder<List<StoreItem>>(
             future: _future,
             builder: (ctx, snap) {
@@ -186,7 +201,11 @@ class _StorePageState extends State<StorePage> {
             tooltip: l.storeReloadTooltip,
             onPressed: _runSearch,
           ),
-          const SizedBox(width: FaiSpace.sm),
+          // Trailing pad pulls the IconButton's outer edge in
+          // to match the body's right-side padding. The icon
+          // glyph itself ends up flush with the rightmost grid
+          // card, not floating in space.
+          const SizedBox(width: FaiSpace.md),
         ],
       ),
       body: Column(
@@ -287,11 +306,31 @@ class _StorePageState extends State<StorePage> {
                         ],
                         if (showToday) ...[
                           _StoreTodayHero(
-                            story: _todayStory,
+                            story:
+                                _todayStories[_todayIndex % _todayStories.length],
                             locale: _locale,
+                            currentIndex: _todayIndex,
+                            totalCount: _todayStories.length,
+                            onPrev: _todayStories.length > 1
+                                ? () => setState(() {
+                                      _todayIndex = (_todayIndex -
+                                              1 +
+                                              _todayStories.length) %
+                                          _todayStories.length;
+                                    })
+                                : null,
+                            onNext: _todayStories.length > 1
+                                ? () => setState(() {
+                                      _todayIndex = (_todayIndex + 1) %
+                                          _todayStories.length;
+                                    })
+                                : null,
                             onDismiss: () =>
                                 setState(() => _todayDismissed = true),
-                            onCta: _todayStory.cta == TodayCta.openSettings
+                            onCta: _todayStories[
+                                            _todayIndex % _todayStories.length]
+                                        .cta ==
+                                    TodayCta.openSettings
                                 ? () => FaiSettingsDialog.show(context)
                                 : null,
                             recommendedSources: embedRecommended
@@ -2659,11 +2698,14 @@ class _ScreenshotPlaceholder extends StatelessWidget {
   }
 }
 
-/// Compiled-in fallback story shown when
+/// Compiled-in fallback stories shown when
 /// `~/.fai/today/active.yaml` is absent or fails schema
-/// validation. The pipeline operator can override at any time
+/// validation. Operator can override at any time without
-/// without recompiling Studio — see docs/today-pipeline.md.
+/// recompiling Studio — see docs/today-pipeline.md. When the
-const TodayStoryData _kFallbackTodayStory = TodayStoryData(
+/// operator accepts a story, that single story becomes the
+/// active item and the carousel collapses to a single slide.
+const List<TodayStoryData> _kFallbackTodayStories = <TodayStoryData>[
+  TodayStoryData(
     badgeEn: 'PUBLIC SOURCES',
     badgeDe: 'ÖFFENTLICHE QUELLEN',
     titleEn: 'Fill your store in two clicks',
@@ -2676,7 +2718,50 @@ const TodayStoryData _kFallbackTodayStory = TodayStoryData(
     ctaLabelDe: 'Quellen verwalten',
     icon: Icons.hub_outlined,
     cta: TodayCta.openSettings,
-);
+  ),
+  TodayStoryData(
+    badgeEn: 'SANDBOX BY DEFAULT',
+    badgeDe: 'SANDBOX VON ANFANG AN',
+    titleEn: 'Every module declares what it can touch',
+    titleDe: 'Jedes Modul deklariert, worauf es zugreifen darf',
+    bodyEn:
+        'F∆I modules ship with an explicit permission list — network endpoints, files, environment variables. The hub enforces it; nothing reaches outside the sandbox without the operator approving it. Click any installed module to see exactly which permissions it asked for.',
+    bodyDe:
+        'F∆I-Module bringen eine explizite Berechtigungsliste mit — Netzwerk-Endpunkte, Dateien, Umgebungsvariablen. Der Hub setzt sie durch; ohne Operator-Freigabe verlässt nichts die Sandbox. Klicke ein installiertes Modul, um seine genauen Berechtigungen zu sehen.',
+    ctaLabelEn: '',
+    ctaLabelDe: '',
+    icon: Icons.shield_outlined,
+    cta: TodayCta.none,
+  ),
+  TodayStoryData(
+    badgeEn: 'TAMPER-EVIDENT AUDIT',
+    badgeDe: 'MANIPULATIONSSICHERES AUDIT',
+    titleEn: 'Every event leaves a hash-chained trace',
+    titleDe: 'Jedes Ereignis hinterlässt eine hash-verkettete Spur',
+    bodyEn:
+        'Flow runs, install / uninstall actions, approval decisions — all of them write into a hash-chained audit log. The Doctor page verifies the chain end-to-end on every load; if a single byte gets touched, you see it. Audit-grade by construction, not by policy.',
+    bodyDe:
+        'Flow-Läufe, Installationen und Deinstallationen, Freigabe-Entscheidungen — alles wird in ein hash-verkettetes Audit-Log geschrieben. Die Diagnose-Seite verifiziert die Kette bei jedem Laden komplett; ein verändertes Byte ist sofort sichtbar. Audit-tauglich qua Konstruktion, nicht qua Policy.',
+    ctaLabelEn: '',
+    ctaLabelDe: '',
+    icon: Icons.shield_outlined,
+    cta: TodayCta.none,
+  ),
+  TodayStoryData(
+    badgeEn: 'AIR-GAP READY',
+    badgeDe: 'AIR-GAP-TAUGLICH',
+    titleEn: 'One binary, no Docker, no external services',
+    titleDe: 'Ein Binary, kein Docker, keine externen Dienste',
+    bodyEn:
+        'The whole hub fits in a single binary that runs on Linux, macOS and Windows. SQLite for state, no message broker, no background services to babysit. Once a module is installed, the flow it powers runs without further network access — perfect for regulated environments where outbound calls have to be justified.',
+    bodyDe:
+        'Der gesamte Hub steckt in einem einzigen Binary für Linux, macOS und Windows. SQLite für den State, kein Message-Broker, keine Hintergrunddienste, die gepflegt werden müssen. Sobald ein Modul installiert ist, läuft der Flow, der es nutzt, ohne weiteren Netzwerkzugriff — ideal für regulierte Umgebungen, in denen jeder ausgehende Call begründet werden muss.',
+    ctaLabelEn: '',
+    ctaLabelDe: '',
+    icon: Icons.rocket_launch,
+    cta: TodayCta.none,
+  ),
+];
 
 /// Editorial hero strip — the first surface a browsing operator
 /// sees. Plays the role of Apple's Today tab: one curated
@@ -2686,6 +2771,15 @@ const TodayStoryData _kFallbackTodayStory = TodayStoryData(
 class _StoreTodayHero extends StatelessWidget {
   final TodayStoryData story;
   final String locale;
+  /// Carousel position (0-based) and total slide count. Drives
+  /// the dot indicator and the visibility of the prev/next
+  /// arrows. When `totalCount == 1` the chrome collapses to a
+  /// single-card layout — operator-accepted stories never wear
+  /// carousel dressing.
+  final int currentIndex;
+  final int totalCount;
+  final VoidCallback? onPrev;
+  final VoidCallback? onNext;
   final VoidCallback onDismiss;
   /// CTA action — null hides the button. Wired by the parent
   /// because navigation targets live in the store-page state,
@@ -2703,6 +2797,10 @@ class _StoreTodayHero extends StatelessWidget {
   const _StoreTodayHero({
     required this.story,
     required this.locale,
+    required this.currentIndex,
+    required this.totalCount,
+    required this.onPrev,
+    required this.onNext,
     required this.onDismiss,
     required this.onCta,
     this.recommendedSources = const <_RecommendedSource>[],
@@ -2848,12 +2946,63 @@ class _StoreTodayHero extends StatelessWidget {
               ],
             ),
           ),
+          // Right-edge column: dismiss + (when more than one
+          // slide exists) a carousel control row. Stacking them
+          // vertically keeps the hero's main row tidy whatever
+          // the slide count.
+          Column(
+            crossAxisAlignment: CrossAxisAlignment.end,
+            children: [
               IconButton(
                 icon: const Icon(Icons.close, size: 16),
                 visualDensity: VisualDensity.compact,
                 tooltip: l.storeTodayDismissTooltip,
                 onPressed: onDismiss,
               ),
+              if (totalCount > 1) ...[
+                const SizedBox(height: FaiSpace.sm),
+                Row(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    IconButton(
+                      icon: const Icon(Icons.chevron_left, size: 18),
+                      visualDensity: VisualDensity.compact,
+                      onPressed: onPrev,
+                    ),
+                    Padding(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 4,
+                      ),
+                      child: Row(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          for (var i = 0; i < totalCount; i++)
+                            Container(
+                              width: 6,
+                              height: 6,
+                              margin: const EdgeInsets.symmetric(
+                                horizontal: 2,
+                              ),
+                              decoration: BoxDecoration(
+                                shape: BoxShape.circle,
+                                color: i == currentIndex
+                                    ? theme.colorScheme.primary
+                                    : theme.colorScheme.outlineVariant,
+                              ),
+                            ),
+                        ],
+                      ),
+                    ),
+                    IconButton(
+                      icon: const Icon(Icons.chevron_right, size: 18),
+                      visualDensity: VisualDensity.compact,
+                      onPressed: onNext,
+                    ),
+                  ],
+                ),
+              ],
+            ],
+          ),
         ],
       ),
     );

lib/widgets/fai_error_box.dart

@@ -0,0 +1,113 @@
+// FaiErrorBox — selectable monospace error / output block with
+// a small copy-to-clipboard button in the top-right corner.
+//
+// Used wherever the operator might want to paste daemon stderr
+// into a chat or bug report: the update banner, install
+// progress dialog, system-AI editor, audit-clear failures, etc.
+// SelectableText alone works for keyboard users but the copy
+// affordance has to be explicit so trackpad operators see it.
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import '../l10n/app_localizations.dart';
+import '../theme/theme.dart';
+import '../theme/tokens.dart';
+
+class FaiErrorBox extends StatefulWidget {
+  /// The text the operator wants to read (and copy). Rendered
+  /// monospace, selectable, multi-line.
+  final String text;
+  /// When true, the box border + foreground colour come from the
+  /// error palette. False renders neutral chrome — useful for
+  /// success / informational copy that still wants the copy
+  /// button.
+  final bool isError;
+  /// Optional max-height before the content scrolls inside the
+  /// box. Falls back to no constraint when null so short
+  /// messages don't get a useless scrollbar.
+  final double? maxHeight;
+
+  const FaiErrorBox({
+    super.key,
+    required this.text,
+    this.isError = false,
+    this.maxHeight,
+  });
+
+  @override
+  State<FaiErrorBox> createState() => _FaiErrorBoxState();
+}
+
+class _FaiErrorBoxState extends State<FaiErrorBox> {
+  bool _justCopied = false;
+
+  Future<void> _copy() async {
+    await Clipboard.setData(ClipboardData(text: widget.text));
+    if (!mounted) return;
+    setState(() => _justCopied = true);
+    Future.delayed(const Duration(seconds: 2), () {
+      if (mounted) setState(() => _justCopied = false);
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final l = AppLocalizations.of(context)!;
+    final accent = widget.isError
+        ? theme.colorScheme.error
+        : theme.colorScheme.outlineVariant;
+    final fg = widget.isError
+        ? theme.colorScheme.error
+        : theme.colorScheme.onSurface;
+    return Container(
+      width: double.infinity,
+      padding: const EdgeInsets.fromLTRB(
+        FaiSpace.sm,
+        FaiSpace.xs,
+        FaiSpace.xs,
+        FaiSpace.sm,
+      ),
+      decoration: BoxDecoration(
+        color: theme.colorScheme.surfaceContainerHigh,
+        borderRadius: BorderRadius.circular(FaiRadius.sm),
+        border: Border.all(color: accent.withValues(alpha: 0.4)),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.end,
+        children: [
+          // Copy button sits above the text on its own row so
+          // long messages never collide with it. Compact enough
+          // not to dominate short single-line messages.
+          Tooltip(
+            message: _justCopied ? l.buttonCopied : l.buttonCopy,
+            child: IconButton(
+              icon: Icon(
+                _justCopied ? Icons.check : Icons.content_copy,
+                size: 14,
+              ),
+              visualDensity: VisualDensity.compact,
+              padding: const EdgeInsets.all(4),
+              constraints: const BoxConstraints(),
+              onPressed: _copy,
+            ),
+          ),
+          ConstrainedBox(
+            constraints: BoxConstraints(
+              maxHeight: widget.maxHeight ?? double.infinity,
+            ),
+            child: Scrollbar(
+              child: SingleChildScrollView(
+                child: SelectableText(
+                  widget.text,
+                  style: FaiTheme.mono(size: 11, color: fg),
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/widgets/fai_settings_dialog.dart

@@ -10,6 +10,7 @@ import '../data/system_actions.dart';
 import '../l10n/app_localizations.dart';
 import '../theme/theme.dart';
 import '../theme/tokens.dart';
+import 'fai_error_box.dart';
 import 'fai_pill.dart';
 import 'fai_system_ai_editor.dart';
 
@@ -416,22 +417,7 @@ class _FaiSettingsDialogState extends State<FaiSettingsDialog> {
                 ),
               if (_channelToast != null) ...[
                 const SizedBox(height: FaiSpace.sm),
-                Container(
+                FaiErrorBox(text: _channelToast!, maxHeight: 200),
-                  width: double.infinity,
-                  padding: const EdgeInsets.all(FaiSpace.sm),
-                  decoration: BoxDecoration(
-                    color: theme.colorScheme.surfaceContainerHigh,
-                    borderRadius: BorderRadius.circular(FaiRadius.sm),
-                    border: Border.all(color: theme.colorScheme.outlineVariant),
-                  ),
-                  child: SelectableText(
-                    _channelToast!,
-                    style: FaiTheme.mono(
-                      size: 11,
-                      color: theme.colorScheme.onSurface,
-                    ),
-                  ),
-                ),
               ],
             ],
             if (_aiStatus != null) ...[

lib/widgets/widgets.dart

@@ -8,6 +8,7 @@ export 'fai_card.dart';
 export 'fai_data_row.dart';
 export 'fai_delta_mark.dart';
 export 'fai_empty_state.dart';
+export 'fai_error_box.dart';
 export 'fai_module_sheet.dart';
 export 'fai_pill.dart';
 export 'fai_settings_dialog.dart';

linux/runner/my_application.cc

@@ -45,11 +45,11 @@ static void my_application_activate(GApplication* application) {
   if (use_header_bar) {
     GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
     gtk_widget_show(GTK_WIDGET(header_bar));
-    gtk_header_bar_set_title(header_bar, "fai_studio");
+    gtk_header_bar_set_title(header_bar, "F\u2206I Studio");
     gtk_header_bar_set_show_close_button(header_bar, TRUE);
     gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
   } else {
-    gtk_window_set_title(window, "fai_studio");
+    gtk_window_set_title(window, "F\u2206I Studio");
   }
 
   gtk_window_set_default_size(window, 1280, 720);

macos/Runner/Info.plist

@@ -13,7 +13,9 @@
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
-	<string>$(PRODUCT_NAME)</string>
+	<string>F∆I Studio</string>
+	<key>CFBundleDisplayName</key>
+	<string>F∆I Studio</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>

macos/Runner/MainFlutterWindow.swift

@@ -8,6 +8,11 @@ class MainFlutterWindow: NSWindow {
     self.contentViewController = flutterViewController
     self.setFrame(windowFrame, display: true)
 
+    // Override the window title so the OS task switcher and
+    // window chrome read "F∆I Studio" instead of the
+    // pubspec-derived "fai_studio".
+    self.title = "F∆I Studio"
+
     RegisterGeneratedPlugins(registry: flutterViewController)
 
     super.awakeFromNib()

pubspec.yaml

@@ -1,7 +1,7 @@
 name: fai_studio
 description: "F∆I Studio — desktop GUI for the F∆I hub"
 publish_to: 'none'
-version: 0.33.1
+version: 0.34.0
 
 environment:
   sdk: ^3.11.0-200.1.beta

windows/runner/main.cpp

@@ -27,7 +27,7 @@ int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
   FlutterWindow window(project);
   Win32Window::Point origin(10, 10);
   Win32Window::Size size(1280, 720);
-  if (!window.Create(L"fai_studio", origin, size)) {
+  if (!window.Create(L"F\u2206I Studio", origin, size)) {
     return EXIT_FAILURE;
   }
   window.SetQuitOnClose(true);