Add standalone wiring diagram PNG export

Fetch the wiring diagram from the VoltPlan API and share it as a
standalone PNG from the Overview share menu on both platforms, with a
localized error when the diagram cannot be generated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

android/app/src/main/res/values-de/strings.xml

@@ -5,6 +5,7 @@
     <!-- Actions -->
     <string name="action_add">Hinzufügen</string>
     <string name="action_back">Zurück</string>
+    <string name="action_save">Speichern</string>
     <string name="action_delete">Löschen</string>
 
     <!-- Systems -->
@@ -177,6 +178,8 @@
     <string name="overview_chargers_empty_subtitle">Füge Landstrom-, DC-DC- oder Solarladegeräte hinzu, um deine Ladeleistung zu verstehen.</string>
     <string name="overview_chargers_empty_create">Ladegerät hinzufügen</string>
     <string name="overview_share_pdf">Vollständiger Bericht (PDF)</string>
+    <string name="overview_share_diagram">Schaltplan</string>
+    <string name="overview_share_diagram_error">Schaltplan konnte nicht erstellt werden. Überprüfe deine Internetverbindung.</string>
 
     <!-- Goal editor steppers -->
     <string name="goal_days">Tage</string>

android/app/src/main/res/values-es/strings.xml

@@ -5,6 +5,7 @@
     <!-- Actions -->
     <string name="action_add">Añadir</string>
     <string name="action_back">Atrás</string>
+    <string name="action_save">Guardar</string>
     <string name="action_delete">Eliminar</string>
 
     <!-- Systems -->
@@ -177,6 +178,8 @@
     <string name="overview_chargers_empty_subtitle">Añade cargadores de toma de puerto, DC-DC o solares para conocer tu capacidad de carga.</string>
     <string name="overview_chargers_empty_create">Añadir cargador</string>
     <string name="overview_share_pdf">Informe completo (PDF)</string>
+    <string name="overview_share_diagram">Diagrama de cableado</string>
+    <string name="overview_share_diagram_error">No se pudo generar el diagrama. Comprueba tu conexión a Internet.</string>
 
     <!-- Goal editor steppers -->
     <string name="goal_days">Días</string>

android/app/src/main/res/values-fr/strings.xml

@@ -5,6 +5,7 @@
     <!-- Actions -->
     <string name="action_add">Ajouter</string>
     <string name="action_back">Retour</string>
+    <string name="action_save">Enregistrer</string>
     <string name="action_delete">Supprimer</string>
 
     <!-- Systems -->
@@ -177,6 +178,8 @@
     <string name="overview_chargers_empty_subtitle">Ajoutez des chargeurs secteur, DC-DC ou solaires pour comprendre votre capacité de charge.</string>
     <string name="overview_chargers_empty_create">Ajouter un chargeur</string>
     <string name="overview_share_pdf">Rapport complet (PDF)</string>
+    <string name="overview_share_diagram">Schéma de câblage</string>
+    <string name="overview_share_diagram_error">Impossible de générer le schéma. Vérifiez votre connexion Internet.</string>
 
     <!-- Goal editor steppers -->
     <string name="goal_days">Jours</string>

android/app/src/main/res/values-nl/strings.xml

@@ -5,6 +5,7 @@
     <!-- Actions -->
     <string name="action_add">Toevoegen</string>
     <string name="action_back">Terug</string>
+    <string name="action_save">Opslaan</string>
     <string name="action_delete">Verwijderen</string>
 
     <!-- Systems -->
@@ -177,6 +178,8 @@
     <string name="overview_chargers_empty_subtitle">Voeg walstroom-, DC-DC- of zonneladers toe om je laadcapaciteit te begrijpen.</string>
     <string name="overview_chargers_empty_create">Lader toevoegen</string>
     <string name="overview_share_pdf">Volledig rapport (PDF)</string>
+    <string name="overview_share_diagram">Bedradingsschema</string>
+    <string name="overview_share_diagram_error">Diagram kon niet worden gegenereerd. Controleer je internetverbinding.</string>
 
     <!-- Goal editor steppers -->
     <string name="goal_days">Dagen</string>

android/app/src/main/res/values/strings.xml

@@ -5,6 +5,7 @@
     <!-- Actions -->
     <string name="action_add">Add</string>
     <string name="action_back">Back</string>
+    <string name="action_save">Save</string>
     <string name="action_delete">Delete</string>
 
     <!-- Systems -->
@@ -177,6 +178,8 @@
     <string name="overview_chargers_empty_subtitle">Add shore power, DC-DC, or solar chargers to understand your charging capacity.</string>
     <string name="overview_chargers_empty_create">Add Charger</string>
     <string name="overview_share_pdf">Full Report (PDF)</string>
+    <string name="overview_share_diagram">Wiring Diagram</string>
+    <string name="overview_share_diagram_error">Could not generate diagram. Check your internet connection.</string>
 
     <!-- Goal editor steppers -->
     <string name="goal_days">Days</string>