chore(android): bump Hilt 2.52 -> 2.59.2 for AGP 9 compat

Hilt 2.52 referenced AGP's old BaseExtension which AGP 9 removed,
causing ktlintCheck to fail at plugin-application time:

  Failed to apply plugin 'com.google.dagger.hilt.android'.
  > Android BaseExtension not found.

Dagger/Hilt 2.59+ adds AGP 9 support (and mandates it for the Gradle
plugin path). 2.59.2 is the current latest.

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

android/gradle/libs.versions.toml

@@ -6,7 +6,7 @@
 agp = "9.0.1"
 kotlin = "2.2.21"
 ksp = "2.2.21-2.0.5"
-hilt = "2.52"
+hilt = "2.59.2"
 hilt-androidx = "1.2.0"
 compose-bom = "2026.05.01"
 nav-compose = "2.8.3"