Treat the mobile web surface as a constrained runtime so sync loads smaller message pages, keeps fewer warm session caches, and evicts heavy inactive sessions instead of retaining them across switches.
Limit mobile message-record and turn-model caches to reduce memory pressure on phones while preserving bounded initial page expansion for large final turns.
Split the mobile session status bar so the collapsed state avoids subscribing to the full session/status list; the expensive grouping work now only mounts for the expanded list.
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Bohdan Triapitsyn
bb3a51db39