feat: federation panel + Dart SDK federation methods (0.70.0)

A new 'Föderation' destination (primary side) lists connected
satellites — name, region, version, wire version, advertised
capabilities — and adds them in one step: 'Add satellite' issues a
single-use bootstrap token bundled with the primary CA as a
ready-to-paste satellite config (the bundled CA makes the first
connect tamper-proof). Localized EN + DE, in-app help doc. Uses the
new HubService.listSatellites / issueSatelliteToken wrapping the
SDK's federation methods.

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

lib/l10n/app_de.arb

@@ -1594,5 +1594,23 @@
       "endpoint": {"type": "String"}
     }
   },
-  "hubUnreachableOpenSettings": "Einstellungen öffnen"
+  "hubUnreachableOpenSettings": "Einstellungen öffnen",
+  "navFederation": "Föderation",
+  "federationTitle": "Föderation",
+  "federationReloadTooltip": "Satelliten neu laden",
+  "federationAddSatellite": "Satellit hinzufügen",
+  "federationEmptyTitle": "Keine Satelliten verbunden",
+  "federationEmptyHint": "Verbinde einen weiteren Hub als Satellit, um Capabilities dort auszuführen. Stelle dazu ein Enrollment-Token aus.",
+  "federationPillConnected": "verbunden",
+  "federationRegionNone": "keine Region",
+  "federationCapabilities": "{count} angebotene Capabilities",
+  "federationAddDialogTitle": "Enrollment-Token ausstellen",
+  "federationNameLabel": "Satelliten-Name",
+  "federationIssueButton": "Ausstellen",
+  "federationIssueFailed": "Token konnte nicht ausgestellt werden: {error}",
+  "federationEnrollmentTitle": "{name} einrichten",
+  "federationTokenLabel": "Bootstrap-Token (einmalig)",
+  "federationConfigLabel": "Satelliten-Konfiguration (in den Satelliten einfügen)",
+  "federationCopied": "In die Zwischenablage kopiert",
+  "federationEnrollmentHint": "Übergib das Token dem Satelliten-Betreiber über einen sicheren Kanal. Die mitgelieferte CA macht den ersten Connect des Satelliten manipulationssicher."
 }

lib/l10n/app_en.arb

@@ -1597,5 +1597,38 @@
       "endpoint": {"type": "String"}
     }
   },
-  "hubUnreachableOpenSettings": "Open Settings"
+  "hubUnreachableOpenSettings": "Open Settings",
+  "navFederation": "Federation",
+  "federationTitle": "Federation",
+  "federationReloadTooltip": "Reload satellites",
+  "federationAddSatellite": "Add satellite",
+  "federationEmptyTitle": "No satellites connected",
+  "federationEmptyHint": "Connect another hub as a satellite to run capabilities on it. Issue an enrollment token to get started.",
+  "federationPillConnected": "connected",
+  "federationRegionNone": "no region",
+  "federationCapabilities": "{count} advertised capabilities",
+  "@federationCapabilities": {
+    "placeholders": {
+      "count": {"type": "int"}
+    }
+  },
+  "federationAddDialogTitle": "Issue an enrollment token",
+  "federationNameLabel": "Satellite name",
+  "federationIssueButton": "Issue",
+  "federationIssueFailed": "Could not issue token: {error}",
+  "@federationIssueFailed": {
+    "placeholders": {
+      "error": {"type": "String"}
+    }
+  },
+  "federationEnrollmentTitle": "Enroll {name}",
+  "@federationEnrollmentTitle": {
+    "placeholders": {
+      "name": {"type": "String"}
+    }
+  },
+  "federationTokenLabel": "Bootstrap token (single use)",
+  "federationConfigLabel": "Satellite config (paste into the satellite)",
+  "federationCopied": "Copied to clipboard",
+  "federationEnrollmentHint": "Hand the token to the satellite operator over a secure channel. The bundled CA makes the satellite's first connect tamper-proof."
 }

lib/l10n/app_localizations.dart

@@ -4470,6 +4470,114 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Open Settings'**
   String get hubUnreachableOpenSettings;
+
+  /// No description provided for @navFederation.
+  ///
+  /// In en, this message translates to:
+  /// **'Federation'**
+  String get navFederation;
+
+  /// No description provided for @federationTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Federation'**
+  String get federationTitle;
+
+  /// No description provided for @federationReloadTooltip.
+  ///
+  /// In en, this message translates to:
+  /// **'Reload satellites'**
+  String get federationReloadTooltip;
+
+  /// No description provided for @federationAddSatellite.
+  ///
+  /// In en, this message translates to:
+  /// **'Add satellite'**
+  String get federationAddSatellite;
+
+  /// No description provided for @federationEmptyTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'No satellites connected'**
+  String get federationEmptyTitle;
+
+  /// No description provided for @federationEmptyHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Connect another hub as a satellite to run capabilities on it. Issue an enrollment token to get started.'**
+  String get federationEmptyHint;
+
+  /// No description provided for @federationPillConnected.
+  ///
+  /// In en, this message translates to:
+  /// **'connected'**
+  String get federationPillConnected;
+
+  /// No description provided for @federationRegionNone.
+  ///
+  /// In en, this message translates to:
+  /// **'no region'**
+  String get federationRegionNone;
+
+  /// No description provided for @federationCapabilities.
+  ///
+  /// In en, this message translates to:
+  /// **'{count} advertised capabilities'**
+  String federationCapabilities(int count);
+
+  /// No description provided for @federationAddDialogTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Issue an enrollment token'**
+  String get federationAddDialogTitle;
+
+  /// No description provided for @federationNameLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Satellite name'**
+  String get federationNameLabel;
+
+  /// No description provided for @federationIssueButton.
+  ///
+  /// In en, this message translates to:
+  /// **'Issue'**
+  String get federationIssueButton;
+
+  /// No description provided for @federationIssueFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'Could not issue token: {error}'**
+  String federationIssueFailed(String error);
+
+  /// No description provided for @federationEnrollmentTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Enroll {name}'**
+  String federationEnrollmentTitle(String name);
+
+  /// No description provided for @federationTokenLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Bootstrap token (single use)'**
+  String get federationTokenLabel;
+
+  /// No description provided for @federationConfigLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Satellite config (paste into the satellite)'**
+  String get federationConfigLabel;
+
+  /// No description provided for @federationCopied.
+  ///
+  /// In en, this message translates to:
+  /// **'Copied to clipboard'**
+  String get federationCopied;
+
+  /// No description provided for @federationEnrollmentHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Hand the token to the satellite operator over a secure channel. The bundled CA makes the satellite\'s first connect tamper-proof.'**
+  String get federationEnrollmentHint;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_de.dart

@@ -2632,4 +2632,67 @@ class AppLocalizationsDe extends AppLocalizations {
 
   @override
   String get hubUnreachableOpenSettings => 'Einstellungen öffnen';
+
+  @override
+  String get navFederation => 'Föderation';
+
+  @override
+  String get federationTitle => 'Föderation';
+
+  @override
+  String get federationReloadTooltip => 'Satelliten neu laden';
+
+  @override
+  String get federationAddSatellite => 'Satellit hinzufügen';
+
+  @override
+  String get federationEmptyTitle => 'Keine Satelliten verbunden';
+
+  @override
+  String get federationEmptyHint =>
+      'Verbinde einen weiteren Hub als Satellit, um Capabilities dort auszuführen. Stelle dazu ein Enrollment-Token aus.';
+
+  @override
+  String get federationPillConnected => 'verbunden';
+
+  @override
+  String get federationRegionNone => 'keine Region';
+
+  @override
+  String federationCapabilities(int count) {
+    return '$count angebotene Capabilities';
+  }
+
+  @override
+  String get federationAddDialogTitle => 'Enrollment-Token ausstellen';
+
+  @override
+  String get federationNameLabel => 'Satelliten-Name';
+
+  @override
+  String get federationIssueButton => 'Ausstellen';
+
+  @override
+  String federationIssueFailed(String error) {
+    return 'Token konnte nicht ausgestellt werden: $error';
+  }
+
+  @override
+  String federationEnrollmentTitle(String name) {
+    return '$name einrichten';
+  }
+
+  @override
+  String get federationTokenLabel => 'Bootstrap-Token (einmalig)';
+
+  @override
+  String get federationConfigLabel =>
+      'Satelliten-Konfiguration (in den Satelliten einfügen)';
+
+  @override
+  String get federationCopied => 'In die Zwischenablage kopiert';
+
+  @override
+  String get federationEnrollmentHint =>
+      'Übergib das Token dem Satelliten-Betreiber über einen sicheren Kanal. Die mitgelieferte CA macht den ersten Connect des Satelliten manipulationssicher.';
 }

lib/l10n/app_localizations_en.dart

@@ -2635,4 +2635,67 @@ class AppLocalizationsEn extends AppLocalizations {
 
   @override
   String get hubUnreachableOpenSettings => 'Open Settings';
+
+  @override
+  String get navFederation => 'Federation';
+
+  @override
+  String get federationTitle => 'Federation';
+
+  @override
+  String get federationReloadTooltip => 'Reload satellites';
+
+  @override
+  String get federationAddSatellite => 'Add satellite';
+
+  @override
+  String get federationEmptyTitle => 'No satellites connected';
+
+  @override
+  String get federationEmptyHint =>
+      'Connect another hub as a satellite to run capabilities on it. Issue an enrollment token to get started.';
+
+  @override
+  String get federationPillConnected => 'connected';
+
+  @override
+  String get federationRegionNone => 'no region';
+
+  @override
+  String federationCapabilities(int count) {
+    return '$count advertised capabilities';
+  }
+
+  @override
+  String get federationAddDialogTitle => 'Issue an enrollment token';
+
+  @override
+  String get federationNameLabel => 'Satellite name';
+
+  @override
+  String get federationIssueButton => 'Issue';
+
+  @override
+  String federationIssueFailed(String error) {
+    return 'Could not issue token: $error';
+  }
+
+  @override
+  String federationEnrollmentTitle(String name) {
+    return 'Enroll $name';
+  }
+
+  @override
+  String get federationTokenLabel => 'Bootstrap token (single use)';
+
+  @override
+  String get federationConfigLabel =>
+      'Satellite config (paste into the satellite)';
+
+  @override
+  String get federationCopied => 'Copied to clipboard';
+
+  @override
+  String get federationEnrollmentHint =>
+      'Hand the token to the satellite operator over a secure channel. The bundled CA makes the satellite\'s first connect tamper-proof.';
 }