Library folder setting + title-time restore + notification heads-up/lockscreen + version stamp

- Settings: editable Library folder (blank = default Music/Recordings);
  bad/unusable paths keep previous folder, Current path shown, toast on update/reset
- Repository: refreshRoot never resets behind user; migrateRestoreTimes()
  restores HH-mm from createdAt for date-only titles, handles (2) collisions, once
- Notification: fresh v2 channel IMPORTANCE_HIGH (banner on record start),
  PRIVATE + publicVersion for secure lockscreen (single mic row, no pills)
- Build: versionCode = git commit count, versionName 0.1.<count>
- README: library folder note
- Tests: LibraryRootTest, TitleRestoreTest, updated layout + settings tests

android/app/build.gradle.kts

@@ -14,8 +14,14 @@ android {
         applicationId = "com.shonar"
         minSdk = 26
         targetSdk = 35
-        versionCode = 1
-        versionName = "0.1.0"
+        // Every iteration stamps its version: code = commit count (monotonic),
+        // name carries it. Falls back to 1 when git is unavailable.
+        val gitCount = runCatching {
+            providers.exec { commandLine("git", "rev-list", "--count", "HEAD") }
+                .standardOutput.asText.get().trim().toInt()
+        }.getOrDefault(1)
+        versionCode = gitCount
+        versionName = "0.1.$gitCount"
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }