chore: add gradle wrapper + version catalog + root build

Bootstrapped Gradle 8.14 wrapper from HouseHoldKeaper, then upgraded
to 9.5.1 (required by AGP 9.1.1). All dependency versions verified as
latest stable on 2026-06-08, with Material 3 deliberately pinned to
1.5.0-alpha21 (Expressive APIs are not in any stable release yet).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

gradle/libs.versions.toml

@@ -0,0 +1,61 @@
+[versions]
+agp = "9.1.1"
+kotlin = "2.3.21"
+ksp = "2.3.9"
+hilt = "2.59.2"
+coreKtx = "1.19.0"
+lifecycleRuntime = "2.10.0"
+activityCompose = "1.13.0"
+composeBom = "2026.06.00"
+# Material 3 Expressive APIs currently live only in the 1.5 alpha line.
+# Pin explicitly to override the BOM (which ships stable 1.4.0).
+# Re-evaluate when 1.5.0 stable lands.
+material3 = "1.5.0-alpha21"
+datastore = "1.2.1"
+junit = "6.1.0"
+junitPlatform = "6.1.0"
+truth = "1.4.5"
+androidxJunit = "1.3.0"
+espressoCore = "3.7.0"
+
+[libraries]
+# AndroidX core
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntime" }
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+
+# Compose BOM + libs
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
+
+# Material 3 (Expressive lives in this artifact for 1.5+)
+androidx-material3 = { group = "androidx.compose.material3", name = "material3", version.ref = "material3" }
+
+# Hilt
+hilt-android = { group = "com.google.dagger", name = "hilt-android", version.ref = "hilt" }
+hilt-compiler = { group = "com.google.dagger", name = "hilt-android-compiler", version.ref = "hilt" }
+
+# DataStore
+androidx-datastore-preferences = { group = "androidx.datastore", name = "datastore-preferences", version.ref = "datastore" }
+
+# Unit tests
+junit-jupiter-api = { group = "org.junit.jupiter", name = "junit-jupiter-api", version.ref = "junit" }
+junit-jupiter-engine = { group = "org.junit.jupiter", name = "junit-jupiter-engine", version.ref = "junit" }
+junit-platform-launcher = { group = "org.junit.platform", name = "junit-platform-launcher", version.ref = "junitPlatform" }
+truth = { group = "com.google.truth", name = "truth", version.ref = "truth" }
+
+# Android tests
+androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "androidxJunit" }
+androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
+
+[plugins]
+android-application = { id = "com.android.application", version.ref = "agp" }
+kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+kotlin-compose = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
+ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
+hilt = { id = "com.google.dagger.hilt.android", version.ref = "hilt" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.5.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists