Update team dashboard role UI to reflect higher application roles

[cstns]

Description

Context / Problem
A user with team-level dashboard role sees only instance with actinable dashboards and no menu items. If that user has a higher role in any application, the UI should expose access to the team Dashboard, Hosted Instances, Remote Instances and Applications pages as well. Applications need pre-loading to evaluate effective access.

Acceptance criteria

• On team pages, preload a minimal applications list including the user’s role per application before rendering navigation.
• If the user has a higher-than-dashboard role in at least one application, show menu entries: Dashboard, Hosted Instances, Remote Instances.
• If the user has only team-level dashboard role and no higher application roles, keep the minimal UI (dashboards only).
• Route guards align with the computed effective role. Direct URL access respects the same logic.

Epic/Story

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