Add import file to mobile team view

[sarahentzel]

centralize team code

[Copilot]

Pull request overview

This PR centralizes team-related UI logic by extracting shared “team actions” behavior into a reusable hook and dialog component, and exposes the import dialog from the mobile team switch view.

Changes:

• Refactor SwitchTeams floating actions to use a shared useTeamActions hook and always render ImportTab when opened.
• Refactor TeamActions to reuse the same useTeamActions hook and extract the shared content creator UI into SharedContentCreatorDialog.
• Add new shared modules: useTeamActions and SharedContentCreatorDialog.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
src/renderer/src/routes/SwitchTeams.tsx	Uses shared team actions hook; makes import dialog accessible from this view; replaces inline shared-content dialog with extracted component.
src/renderer/src/components/Team/useTeamActions.ts	New hook consolidating Add Team / Import / Shared Content Creator state + handlers.
src/renderer/src/components/Team/TeamActions.tsx	Refactored to consume useTeamActions and SharedContentCreatorDialog.
src/renderer/src/components/Team/SharedContentCreatorDialog.tsx	New reusable dialog component for Shared Content Creator flow.

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