[Task]: Lazy-load inactive ModelSettings side panels

[DeJeune]

Task Type

Refactor

Context

src/renderer/pages/settings/ModelSettings/ModelSettings.tsx statically imports the full TranslateSettings and TopicNamingSettings panels. These panels are only used after the matching sidebar selection, and are unreachable in onboarding because showSettingsButton={false}. This violates bundle-dynamic-imports and bundle-conditional.

Normal model settings and onboarding therefore load translation-language management, preference hooks, and panel dependencies that are usually closed and sometimes impossible to open.

Definition of Done

• Lazy-load TranslateSettings and TopicNamingSettings only for the active panel.
• Ensure showSettingsButton={false} does not load either panel module.
• Preserve panel navigation and close behavior.
• Add or update focused tests for conditional panel loading where behavior changes.

References

• Code: src/renderer/pages/settings/ModelSettings/ModelSettings.tsx
• Code: src/renderer/windows/main/onboarding/OnboardingPage.tsx
• Rules: bundle-dynamic-imports, bundle-conditional

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This task is not reserved for the core team. Community contributions are welcome — if you would like to pick it up, leave a comment before you start so we can avoid duplicated work.