style: modernize UI aesthetics and replace app launcher icons

app/src/main/java/com/m57/hermescontrol/ui/connect/ConnectScreen.kt

@@ -3,6 +3,8 @@ package com.m57.hermescontrol.ui.connect
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -38,6 +40,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.PasswordVisualTransformation
@@ -64,10 +67,21 @@ fun ConnectScreen(
 
     var passwordVisible by remember { mutableStateOf(false) }
 
+    val backgroundGradient =
+        Brush.verticalGradient(
+            colors =
+                listOf(
+                    MaterialTheme.colorScheme.background,
+                    MaterialTheme.colorScheme.surfaceVariant.copy(alpha = 0.5f),
+                    MaterialTheme.colorScheme.primary.copy(alpha = 0.1f),
+                ),
+        )
+
     Box(
         modifier =
             modifier
                 .fillMaxSize()
+                .background(backgroundGradient)
                 .imePadding(),
         contentAlignment = Alignment.Center,
     ) {
@@ -110,9 +124,14 @@ fun ConnectScreen(
                 modifier = Modifier.fillMaxWidth(),
                 colors =
                     CardDefaults.cardColors(
-                        containerColor = MaterialTheme.colorScheme.surface,
+                        containerColor = MaterialTheme.colorScheme.surface.copy(alpha = 0.7f),
                     ),
-                elevation = CardDefaults.cardElevation(defaultElevation = 2.dp),
+                border =
+                    BorderStroke(
+                        width = 1.dp,
+                        color = MaterialTheme.colorScheme.outline.copy(alpha = 0.2f),
+                    ),
+                elevation = CardDefaults.cardElevation(defaultElevation = 8.dp),
             ) {
                 Column(
                     modifier =