fix: restore the jump-to-bottom glide and keep user state, selections and scroll anchors in windowed lists

Pause scroll writes while the jump-to-bottom smooth scroll runs; keep rows with pending questions, approvals, recent interactions and selection ends mounted; cache Mermaid results; copy text spanning unmounted rows; anchor the sidebar on id changes; disable native overflow-anchor for windowed lists; write terminal output on the leading edge and before clear; forward remote events every 16 ms; flush streaming text before copy/export; add performance principle P10 (no UX regressions).

src/main/ipc.ts

@@ -3988,6 +3988,9 @@ export function registerIpcHandlers(
       let remoteEventBatchClosed = false
       const remoteEventBatcher = new RemoteEventBatcher<RemoteBatchEvent>({
         onError: (error) => controller.abort(error),
+        // The batch already coalesced a frame of deltas: send them now rather
+        // than holding them for another public-buffer interval.
+        onTimerFlushed: () => publicEventBuffer.flush(),
         persist: (entries) =>
           remoteConversationRecovery
             ? assistantDatabase.appendRemoteConversationTaskEventsBatch({