Set up project skeleton (milestone 1)

- Architecture and feature overview in docs/ARCHITECTURE.md
- Gradle 9.8 / AGP 9.4 / Kotlin 2.4 with version catalog and convention plugins
- Modules :app, :core:*, :device-profiles, :feature:* (placeholder screens)
- Flavors core (no INTERNET, enforced by a build check) and full
- Material You theme, navigation, expert mode and dry-run settings (DataStore)
- Pixel 8-10 device detection, unit tests, GPLv3 license, English README with Obtainium badge

Co-Authored-By: Claude Opus 5.5 <[email protected]>

core/system/build.gradle.kts

@@ -0,0 +1,13 @@
+plugins {
+    alias(libs.plugins.pixelwall.android.library)
+    alias(libs.plugins.pixelwall.android.hilt)
+}
+
+android {
+    namespace = "org.pixelwall.core.system"
+}
+
+dependencies {
+    api(project(":core:domain"))
+    implementation(libs.androidx.core.ktx)
+}

core/system/src/main/kotlin/org/pixelwall/core/system/BuildDeviceInfoProvider.kt

@@ -0,0 +1,18 @@
+package org.pixelwall.core.system
+
+import android.os.Build
+import org.pixelwall.core.domain.DeviceInfoProvider
+import org.pixelwall.core.model.DeviceInfo
+import javax.inject.Inject
+
+class BuildDeviceInfoProvider @Inject constructor() : DeviceInfoProvider {
+    override fun current() = DeviceInfo(
+        manufacturer = Build.MANUFACTURER,
+        brand = Build.BRAND,
+        device = Build.DEVICE,
+        model = Build.MODEL,
+        sdkInt = Build.VERSION.SDK_INT,
+        release = Build.VERSION.RELEASE,
+        securityPatch = Build.VERSION.SECURITY_PATCH,
+    )
+}

core/system/src/main/kotlin/org/pixelwall/core/system/di/SystemModule.kt

@@ -0,0 +1,15 @@
+package org.pixelwall.core.system.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import org.pixelwall.core.domain.DeviceInfoProvider
+import org.pixelwall.core.system.BuildDeviceInfoProvider
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class SystemModule {
+    @Binds
+    abstract fun bindDeviceInfoProvider(impl: BuildDeviceInfoProvider): DeviceInfoProvider
+}