Delete local conversations atomically, retain replay protection and sequence counters, and guard asynchronous media work by history generation. Add Android avatar menu and confirmation, persistent file cleanup, and regression coverage.
Fix unnamed member wire padding and compact Android member action spacing.
Validation: 158 core tests passed; targeted DM tests, desktop build, Android unit tests and debug APK build passed.
Refresh both AGENTS guides and clarify module purpose, usage, ownership, threading, return values and wire formats in headers. Remove the unused timeout_heap freed_count field and unimplemented getter.
evgeny