feat(dashboard): add DashboardViewModel, metric gauge pager, chart integration

- Add DashboardScreenContract and DashboardViewModel with dummy data
- Extend MetricGauge with pager, page indicators, sensor config
- Integrate AirMQChart and city selector
- ManageScreen: scaffold contentWindowInsets for edge-to-edge header
- Add compose-foundation dependency for HorizontalPager

Made-with: Cursor

app/build.gradle.kts

@@ -81,6 +81,7 @@ dependencies {
     implementation(libs.androidx.compose.ui.graphics)
     implementation(libs.androidx.compose.ui.tooling.preview)
     implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.foundation)
     implementation(libs.androidx.navigation.compose)
     implementation(libs.hilt.android)
     implementation(libs.androidx.hilt.navigation.compose)