feat(app): 为模块卡片添加横幅背景功能

- 数据层：LocalModule/ModuleInfo 新增 banner 字段，解析 module.prop 的 banner 属性
  （URL 直接存储，相对路径解析为 /data/adb/modules/{id}/{banner} 绝对路径）
- UI 层：ModuleItem 使用 onSizeChanged 动态匹配外层 Box 高度，banner 以 18% 透明度
  + 垂直渐变遮罩铺满卡片（insideMargin=0dp，内容 Column 自带 16dp padding）
- 图片加载：LaunchedEffect + BitmapFactory 异步加载，本地文件通过 RootUtils.fs 读取
- 偏好设置：Config.useBanner 默认关闭，开关位于设置页主题二级页面 ColorPaletteScreen
- 资源：新增中英文字符串（settings_banner / settings_banner_summary）

Author: Seyud

app/apk/src/main/java/io/github/seyud/weave/ui/colorpalette/ColorPaletteScreen.kt

@@ -26,6 +26,7 @@ import androidx.compose.material.icons.rounded.CallToAction
 import androidx.compose.material.icons.rounded.Colorize
 import androidx.compose.material.icons.rounded.Palette
 import androidx.compose.material.icons.rounded.WaterDrop
+import androidx.compose.material.icons.rounded.ViewCarousel
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableFloatStateOf
@@ -79,6 +80,7 @@ fun ColorPaletteScreen(
     var enableBlurState by rememberSaveable { mutableStateOf(Config.enableBlur) }
     var enableFloatingBottomBar by rememberSaveable { mutableStateOf(Config.enableFloatingBottomBar) }
     var enableFloatingBottomBarBlur by rememberSaveable { mutableStateOf(Config.enableFloatingBottomBarBlur) }
+    var useBanner by rememberSaveable { mutableStateOf(Config.useBanner) }
     var sliderValue by rememberSaveable { mutableFloatStateOf(Config.pageScale) }
     val showScaleDialog = rememberSaveable { mutableStateOf(false) }
 
@@ -310,6 +312,24 @@ fun ColorPaletteScreen(
                                 }
                             )
                         }
+
+                        SwitchPreference(
+                            title = stringResource(id = CoreR.string.settings_banner),
+                            summary = stringResource(id = CoreR.string.settings_banner_summary),
+                            startAction = {
+                                Icon(
+                                    Icons.Rounded.ViewCarousel,
+                                    modifier = Modifier.padding(end = 6.dp),
+                                    contentDescription = stringResource(id = CoreR.string.settings_banner),
+                                    tint = colorScheme.onBackground
+                                )
+                            },
+                            checked = useBanner,
+                            onCheckedChange = {
+                                Config.useBanner = it
+                                useBanner = it
+                            }
+                        )
                     }
 
                     // Predictive back / Page scale section

app/apk/src/main/java/io/github/seyud/weave/ui/module/ModuleInfo.kt

@@ -32,6 +32,7 @@ data class ModuleInfo(
     val actionIconPath: String?,
     val webUiIconPath: String?,
     val outdated: Boolean,
+    val banner: String = "",
 ) {
     /**
      * 是否显示警告信息
@@ -112,6 +113,7 @@ data class ModuleInfo(
                 actionIconPath = localModule.actionIconPath,
                 webUiIconPath = localModule.webUiIconPath,
                 outdated = localModule.outdated,
+                banner = localModule.banner,
             )
         }
     }