fix: disable dark mode and dynamic color to fix Samsung foldable display issues

Force light theme only, block Samsung Force Dark Mode via forceDarkAllowed=false,
and add explicit text colors to prevent invisible text on light backgrounds.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/main/java/com/example/medilightv2android/ui/theme/Theme.kt

@@ -1,21 +1,8 @@
 package com.example.medilightv2android.ui.theme
 
-import android.app.Activity
-import android.os.Build
-import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.darkColorScheme
-import androidx.compose.material3.dynamicDarkColorScheme
-import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.platform.LocalContext
-
-private val DarkColorScheme = darkColorScheme(
-    primary = Purple80,
-    secondary = PurpleGrey80,
-    tertiary = Pink80
-)
 
 private val LightColorScheme = lightColorScheme(
     primary = Purple40,
@@ -35,23 +22,13 @@ private val LightColorScheme = lightColorScheme(
 
 @Composable
 fun Medilightv2androidTheme(
-    darkTheme: Boolean = isSystemInDarkTheme(),
-    // Dynamic color is available on Android 12+
-    dynamicColor: Boolean = true,
     content: @Composable () -> Unit
 ) {
-    val colorScheme = when {
-        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
-            val context = LocalContext.current
-            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
-        }
-
-        darkTheme -> DarkColorScheme
-        else -> LightColorScheme
-    }
-
+    // Always use light color scheme — app is designed for light mode only.
+    // Dynamic color and dark theme disabled to prevent Samsung Force Dark Mode
+    // and Material You from overriding custom MediLight colors.
     MaterialTheme(
-        colorScheme = colorScheme,
+        colorScheme = LightColorScheme,
         typography = Typography,
         content = content
     )

app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt

@@ -372,7 +372,7 @@ private fun InfoCard(title: String, value: String, unit: String, color: Color, m
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.spacedBy(6.dp)
         ) {
-            Text(value, fontSize = 20.sp, fontWeight = FontWeight.Bold)
+            Text(value, fontSize = 20.sp, fontWeight = FontWeight.Bold, color = Color(0xFF1C1B1F))
             if (unit.isNotEmpty()) Text(unit, fontSize = 11.sp, color = MlSecondaryText)
             Text(title, fontSize = 11.sp, fontWeight = FontWeight.SemiBold, color = MlSecondaryText)
         }

app/src/main/java/com/example/medilightv2android/ui/views/monitoring/VivamyoMonitoringView.kt

@@ -404,7 +404,7 @@ private fun MetricBox(title: String, value: Double, unit: String, color: Color,
             Spacer(modifier = Modifier.width(4.dp))
             Text(title, fontSize = 11.sp, fontWeight = FontWeight.SemiBold, color = MlSecondaryText)
         }
-        Text(String.format("%.1f", value), fontSize = 22.sp, fontWeight = FontWeight.Bold, modifier = Modifier.fillMaxWidth(), textAlign = androidx.compose.ui.text.style.TextAlign.End)
+        Text(String.format("%.1f", value), fontSize = 22.sp, fontWeight = FontWeight.Bold, color = Color(0xFF1C1B1F), modifier = Modifier.fillMaxWidth(), textAlign = androidx.compose.ui.text.style.TextAlign.End)
         Text(unit, fontSize = 10.sp, color = MlSecondaryText, modifier = Modifier.fillMaxWidth(), textAlign = androidx.compose.ui.text.style.TextAlign.End)
     }
 }

app/src/main/res/values/themes.xml

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="Theme.Medilightv2android" parent="android:Theme.Material.Light.NoActionBar" />
+    <style name="Theme.Medilightv2android" parent="android:Theme.Material.Light.NoActionBar">
+        <item name="android:forceDarkAllowed">false</item>
+    </style>
 </resources>