Fix race when persisting Termux output for next bubble

Author: Android-PowerUser

app/src/main/kotlin/com/google/ai/sample/util/TermuxOutputPreferences.kt

@@ -11,14 +11,20 @@ object TermuxOutputPreferences {
         val prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
         val existing = prefs.getString(KEY_PENDING_OUTPUT, "").orEmpty()
         val merged = if (existing.isBlank()) output else "$existing\n\n$output"
-        prefs.edit().putString(KEY_PENDING_OUTPUT, merged).apply()
+        val committed = prefs.edit().putString(KEY_PENDING_OUTPUT, merged).commit()
+        if (!committed) {
+            throw IllegalStateException("Failed to persist pending Termux output")
+        }
     }
 
     fun consumeOutput(context: Context): String? {
         val prefs = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE)
         val value = prefs.getString(KEY_PENDING_OUTPUT, "").orEmpty().trim()
         if (value.isBlank()) return null
-        prefs.edit().remove(KEY_PENDING_OUTPUT).apply()
+        val committed = prefs.edit().remove(KEY_PENDING_OUTPUT).commit()
+        if (!committed) {
+            throw IllegalStateException("Failed to clear consumed Termux output")
+        }
         return value
     }
 }