Replace the muted gold accent with MG red

ev_accent is now #E0424C, the red of the launcher icon (about 4.6:1 on
the black background, enough for accent-coloured text; the darker MG
brand red is about 3:1). ev_on_accent and ev_gold_surface follow with a
dark red tint; the gold hardcoded in two drawables and the consumption
period buttons is replaced too. AGENTS.md's visual direction updated.

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

@@ -852,9 +852,9 @@ public class MainActivity extends AppCompatActivity {
             MaterialButton button = consumptionPane.findViewById(id);
             boolean selected = id == selectedId;
             button.setSelected(selected);
-            button.setTextColor(selected ? 0xFFD8C39A : COLOR_PENDING);
+            button.setTextColor(selected ? 0xFFE0424C : COLOR_PENDING);
             button.setStrokeColor(android.content.res.ColorStateList.valueOf(
-                    selected ? 0xFFD8C39A : 0xFF3A4143));
+                    selected ? 0xFFE0424C : 0xFF3A4143));
         }
     }