Initial commit: GeoZoner Android app scaffolding

- Full Android project with Gradle wrapper
- Hilt DI, Room DB, Retrofit networking
- Auth flow with JWT token management
- Bottom navigation with 4 tabs
- Material 3 theme (light/dark)
- Stub screens ready for implementation
- Ready for Mapbox integration

app/build.gradle.kts

@@ -0,0 +1,148 @@
+import java.util.Properties
+
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.compose.compiler)
+    alias(libs.plugins.ksp)
+    alias(libs.plugins.hilt)
+}
+
+// Load local.properties for Mapbox token
+val localProperties = Properties().apply {
+    val localPropsFile = rootProject.file("local.properties")
+    if (localPropsFile.exists()) {
+        load(localPropsFile.inputStream())
+    }
+}
+
+android {
+    namespace = "com.geozoner.app"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "com.geozoner.app"
+        minSdk = 29
+        targetSdk = 35
+        versionCode = 1
+        versionName = "0.1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+
+        // Inject Mapbox public token as a BuildConfig field
+        buildConfigField(
+            "String",
+            "MAPBOX_PUBLIC_TOKEN",
+            "\"${localProperties.getProperty("MAPBOX_PUBLIC_TOKEN", "")}\""
+        )
+
+        // Backend base URL
+        buildConfigField(
+            "String",
+            "BASE_URL",
+            "\"http://10.0.2.2:8000\""
+        )
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+            buildConfigField(
+                "String",
+                "BASE_URL",
+                "\"https://api.geozoner.com\""
+            )
+        }
+        debug {
+            isMinifyEnabled = false
+            applicationIdSuffix = ".debug"
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+
+    buildFeatures {
+        compose = true
+        buildConfig = true
+    }
+}
+
+dependencies {
+    // AndroidX Core
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.activity.compose)
+    implementation(libs.androidx.navigation.compose)
+    implementation(libs.androidx.datastore.preferences)
+    implementation(libs.androidx.work.runtime.ktx)
+    implementation(libs.androidx.security.crypto)
+
+    // Compose
+    implementation(platform(libs.compose.bom))
+    implementation(libs.compose.ui)
+    implementation(libs.compose.ui.graphics)
+    implementation(libs.compose.ui.tooling.preview)
+    implementation(libs.compose.material3)
+    implementation(libs.compose.material.icons.extended)
+    debugImplementation(libs.compose.ui.tooling)
+    debugImplementation(libs.compose.ui.test.manifest)
+
+    // Room
+    implementation(libs.room.runtime)
+    implementation(libs.room.ktx)
+    ksp(libs.room.compiler)
+
+    // Hilt
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.android.compiler)
+    implementation(libs.hilt.navigation.compose)
+    implementation(libs.hilt.work)
+    ksp(libs.hilt.work.compiler)
+
+    // Networking
+    implementation(libs.retrofit)
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging)
+    implementation(libs.kotlinx.serialization.json)
+    implementation(libs.retrofit.kotlinx.serialization)
+
+    // Mapbox (uncomment after setting MAPBOX_DOWNLOADS_TOKEN in local.properties)
+    // implementation(libs.mapbox.maps)
+
+    // Firebase (uncomment when google-services.json is added)
+    // implementation(platform(libs.firebase.bom))
+    // implementation(libs.firebase.messaging)
+    // implementation(libs.firebase.analytics)
+
+    // Coroutines
+    implementation(libs.kotlinx.coroutines.android)
+    implementation(libs.kotlinx.coroutines.core)
+
+    // Image loading
+    implementation(libs.coil.compose)
+
+    // Health Connect (Phase 2)
+    // implementation(libs.androidx.health.connect)
+
+    // Testing
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.junit.ext)
+    androidTestImplementation(libs.espresso.core)
+    androidTestImplementation(platform(libs.compose.bom))
+    androidTestImplementation(libs.compose.ui.test.junit4)
+}