Changes
- refactor(tray): separate background host and UI processes
2422d94 - refactor(runtime): remove single-process lifecycle paths
6e91b5d - fix(tray): initialize clipboard on the STA host thread
8591bfb - feat(settings): make UI teardown an optional lightweight mode
0a9324f - feat(settings): add Mips TUN stack selection
e4c94c6