Update all dependencies to March 2026 versions

Major version bumps:
- AGP 8.7.3 → 9.1.0 (remove kotlin-android plugin, now built-in)
- Kotlin 2.0.21 → 2.3.20
- Gradle 8.9 → 9.4.0
- Compose BOM 2024.12.01 → 2026.03.00
- compileSdk/targetSdk 35 → 36

Library updates:
- core-ktx 1.15.0 → 1.18.0
- lifecycle 2.8.7 → 2.10.0
- activity-compose 1.9.3 → 1.13.0
- CameraX 1.4.1 → 1.5.1
- exifinterface 1.3.7 → 1.4.2

AGP 9 migration: removed org.jetbrains.kotlin.android plugin (Kotlin
support is now built into AGP), removed kotlinOptions block (JVM
target handled by compileOptions).

Bump version to 1.1.4.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

build.gradle.kts

@@ -1,6 +1,5 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
     alias(libs.plugins.android.application) apply false
-    alias(libs.plugins.kotlin.android) apply false
     alias(libs.plugins.kotlin.compose) apply false
 }