LogAdapter copies full list and scrolls on every update #96

Problem

LogAdapter.updateLogs always does this.logs = new ArrayList<>(newLogs).

In MainActivity, the observer does:

logAdapter.updateLogs(logs);
if (!logs.isEmpty()) {
    logRecyclerView.scrollToPosition(0);
}

When newSize <= prevSize it falls back to notifyDataSetChanged().

Impact

• Unnecessary full list copies on every log emission
• Scroll jumps to top on every new log line
• notifyDataSetChanged is inefficient for RecyclerView
• Bad for long-running devices with hundreds of log entries

Suggested

• Use DiffUtil (or AsyncListDiffer)
• Only scroll when user is already at top or on explicit "new messages"
• Consider limiting visible log size (virtual scrolling + in-memory ring buffer)

See also: MainActivity:166, LogAdapter:46