w-sss 445328622c fix(ui): use dedicated configSaveError state instead of global lastError
- Add configSaveError field to ChannelsState and AppViewState
- Clear configSaveError before save/reload operations
- Set configSaveError only when config save fails
- Fixes Codex P2 feedback about global error pollution
- Channel config callouts now only show save-specific errors
2026-03-17 21:39:09 +08:00
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