Initial commit: Deepwave Phase 1 - auth scaffolding

Spotify-like Navidrome client scaffold with Hilt DI, a Subsonic API
client (token auth, base-URL rewriting), encrypted single-server
credential storage (DataStore + Tink/Keystore), and a login/session
flow gating Compose Navigation between Login and a placeholder Home
screen.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

gradle.properties

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+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. For more details, visit
+# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
+# org.gradle.parallel=true
+# When enabled, the Configuration Cache allows Gradle to skip the configuration
+# phase entirely if nothing that affects the build configuration (such as build scripts)
+# has changed. Additionally, Gradle applies performance optimizations to task execution.
+org.gradle.configuration-cache=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
+# KSP does not yet add its generated sources via the android.sourceSets DSL that
+# AGP 9's built-in Kotlin requires (https://github.com/google/ksp/issues/2729).
+# Remove this once KSP is updated.
+android.disallowKotlinSourceSets=false