chore: update launch screen slogan for consistency

Author: phodal

mpp-ui/src/commonMain/kotlin/cc/unitmesh/devins/ui/compose/launch/XiuperLaunchScreen.kt

@@ -400,10 +400,10 @@ fun XiuperLaunchScreen(
             Spacer(modifier = Modifier.height(10.dp))
 
             Text(
-                text = "X => Super open, Xiuper build.",
+                text = "One Platform. All Phases. Every Device.",
                 fontSize = 16.sp,
                 fontWeight = FontWeight.Medium,
-                letterSpacing = 3.sp,
+                letterSpacing = 1.sp,
                 color = AutoDevColors.Xiuper.textSecondary.copy(alpha = textAlpha)
             )
         }

mpp-ui/src/wasmJsMain/resources/index.html

@@ -333,7 +333,7 @@
 
         <div class="loader-text">
             <div class="loader-title">Xiuper</div>
-            <div class="loader-slogan">X => Super open, Xiuper build.</div>
+            <div class="loader-slogan">One Platform. All Phases. Every Device.</div>
             <div class="loader-subtitle">Loading WASM<span class="loading-dots"></span></div>
         </div>