Community Moderation & Important Links UI

[pavitra-sa]

What this adds

• AdminControls, StatusBadge, DeleteConfirmationDialog, EditReminderModal (community/moderation)
• LinkCard, CopyLinkButton, CategoryFilter, ManageLinksModal, ImportantLinksTab (community/important-links)
• CommunityToast, SegmentedTabs, useIsCommunityAdmin (community/shared, community/moderation)
• Integrated into CommunityPage.tsx via a Discussions / Important Links toggle

Scope

• Frontend UI only — no backend, no API, no routing changes
• Important Links data is currently local state (empty by default) — ready for backend wiring by whoever owns that

Tested

• pnpm typecheck: pass
• pnpm lint: no errors/warnings in new files
• Manually verified: tab toggle, category filtering, empty states, admin-gated controls, copy-to-clipboard toast, Add/Edit/Delete flow in Manage Links