* perf(model): optimize model tab load speed with two-phase fetch and loadQuick
* perf: optimize data loading across Config, System, Profiles, and Billing tabs
* chore: remove leftover bottom nav references and unused updatePrimaryScreens
* style: fix ktlint violations in Config/Profiles/Billing ViewModels
- property/argument-list wrapping for async(...) calls
- multiline-expression wrapping for async blocks
- remove unused import in ConfigViewModel
- break long error-message string literals to stay under 120 cols
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Co-authored-by: M57 <Hy4ri@users.noreply.github.com>
