Harden Android accessibility, localization and startup (#105)

Implement independent hardening and regression coverage. Keep #105 open for final feature and environment coverage after #106–#110; document the completion boundary and resume order.

android/app/build.gradle.kts

@@ -37,6 +37,21 @@ android {
             )
         }
     }
+    buildTypes.create("benchmark") {
+        initWith(buildTypes.getByName("release"))
+        signingConfig = signingConfigs.getByName("debug")
+        matchingFallbacks += "release"
+    }
+    sourceSets.getByName("benchmark").kotlin.srcDir("src/release/kotlin")
+    buildTypes.create("profile") {
+        initWith(buildTypes.getByName("benchmark"))
+        isMinifyEnabled = false
+        isShrinkResources = false
+    }
+    sourceSets.getByName("profile").apply {
+        kotlin.srcDir("src/release/kotlin")
+        manifest.srcFile("src/benchmark/AndroidManifest.xml")
+    }
     packaging { resources.excludes += "/META-INF/{AL2.0,LGPL2.1}" }
     lint {
         abortOnError = true
@@ -72,6 +87,7 @@ dependencies {
     ksp(libs.hilt.compiler)
     androidTestImplementation(platform(libs.compose.bom))
     androidTestImplementation(libs.compose.ui.test)
+    androidTestImplementation(libs.compose.ui.test.accessibility)
     androidTestImplementation(libs.android.test.runner)
     androidTestImplementation(libs.android.test.espresso)
     implementation(libs.coroutines.android)