feat: add voice log UI with FAB, fragment container, and logbook domain models

- Add VoiceLogFragment, VoiceLogViewModel, VoiceLogState, LogEntry, InMemoryLogbookRepository
- Wire voice log FAB in MainActivity to show/hide fragment container
- Add RECORD_AUDIO permission to manifest
- Add native CMakeLists.txt and native-lib.cpp stubs
- Fix missing BufferOverflow import in LocationService

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/android-app/app/src/main/cpp/native-lib.cpp b/android-app/app/src/main/cpp/native-lib.cpp
new file mode 100644
index 0000000..f606a41
--- /dev/null
+++ b/android-app/app/src/main/cpp/native-lib.cpp
@@ -0,0 +1,14 @@
+#include <jni.h>
+#include <string>
+#include <android/log.h>
+
+#define TAG "WindVisualizationNative"
+
+extern "C" JNIEXPORT jstring JNICALL
+Java_org_terst_nav_MainActivity_stringFromJNI(
+        JNIEnv* env,
+        jobject /* this */) {
+    std::string hello = "Hello from C++";
+    __android_log_print(ANDROID_LOG_INFO, TAG, "stringFromJNI called!");
+    return env->NewStringUTF(hello.c_str());
+}