Translate the dashboard to English; euro instead of lira

Dashboard: every label, empty state, chart legend and the login page
are English; numbers and dates use en-GB (24-hour clock, day-month
dates), money is EUR, percentages read 80% instead of %80, durations
"2 h 05 min". html lang is en. Server version 1.1.2; manifests pin it.

Car app: the charging tab's price suffix, validation message and total
cost use € instead of ₺.

Checked by rendering all three pages from the 1.1.2 image against
InfluxDB 2.7.12 in podman.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

app/src/main/java/com/evsuite/abrp/MainActivity.java

@@ -888,7 +888,7 @@ public class MainActivity extends AppCompatActivity {
             chargePriceInput.setText(String.format(java.util.Locale.US, "%.2f", value));
             Toast.makeText(this, "Charging price saved", Toast.LENGTH_SHORT).show();
         } catch (NumberFormatException e) {
-            chargePriceLayout.setError("Enter a valid ₺/kWh value");
+            chargePriceLayout.setError("Enter a valid €/kWh value");
         }
     }
 
@@ -916,7 +916,7 @@ public class MainActivity extends AppCompatActivity {
                 java.util.Locale.getDefault(), "%.2f kWh", session.gridEnergyKwh) : "—");
         long sec = session.durationSeconds;
         chargeDuration.setText(session.startedAtMs > 0 ? String.format(java.util.Locale.getDefault(), "%02d:%02d:%02d", sec/3600,(sec%3600)/60,sec%60) : "—");
-        chargeTotalCost.setText(session.startedAtMs > 0 ? String.format(java.util.Locale.getDefault(), "%.2f ₺", session.totalCost) : "—");
+        chargeTotalCost.setText(session.startedAtMs > 0 ? String.format(java.util.Locale.getDefault(), "€%.2f", session.totalCost) : "—");
         chargeGraph.setPoints(session.points);
         chargeCurveTable.setText(chargeGraph.tableText());
     }