Also includes pending workspace changes: unsaved-change guard, keep-alive cache and live message store, knowledge workspace dialogs and perf driver updates.
perf:app gains GB_PERF_CPU_THROTTLE (CDP renderer throttling) and a keep-alive memory scenario with post-GC heap samples; perf:knowledge times synchronous FTS, vector and hybrid search at 5k/20k/50k chunks. Results and conclusions recorded in the performance plan (PERF-05, PERF-09, PERF-12).