perf: convert dashboard to SSR streaming with Suspense boundaries

[Lixzon]

closes #248

Summary

Converts the member dashboard from fully client-side rendering to a hybrid SSR/streaming model using Next.js 14 App Router Server Components and Suspense boundaries. Non-wallet-dependent data (community info, public resources) now streams from the server immediately, while wallet-dependent sections hydrate client-side after wallet connection.

Architecture Change

Before:

After:

New Files (6)

lib/api/fetch-server.ts — Server-only data fetcher

• Uses 'server-only' to prevent accidental client imports
• fetchCommunity() and fetchResources() fetch directly from core API
• Cached with next: { revalidate: 60 } for 60-second server-side cache
• Handles errors gracefully with typed ServerFetchError

components/dashboard/community-section.tsx — Server Component

• Renders community name, description, and tiers streamed from server
• Error state: "Could not load community" fallback card

components/dashboard/resources-section.tsx — Server Component

• Renders resource list with tier requirements streamed from server
• Empty state and error state handled gracefully

components/dashboard/skeletons.tsx — Loading placeholders

• CommunityCardSkeleton, ResourcesCardSkeleton, ProfileCardSkeleton, BadgesCardSkeleton
• All use animate-pulse for smooth loading animation

components/dashboard/wallet-sections.tsx — Client Component

• Extracted wallet-dependent sections (membership, profile, verification, badges)
• Handles all states: disconnected, loading, error (with retry), empty

Modified Files (1)

app/dashboard/page.tsx — Rewritten as Server Component

• Removed 'use client' and all useQuery calls
• Three Suspense boundaries for progressive rendering
• Page shell renders instantly regardless of wallet connection state

Performance Impact

Metric	Before	After
Time to First Byte	Waited for client JS	Server fetches during SSR
First Contentful Paint	Blocked on hydration	Page shell renders instantly
Largest Contentful Paint	Waited for 4 waterfall queries	Community/resources stream independently
Wallet-dependent data	Blocked everything	Isolated behind Suspense boundary

Acceptance Criteria Met

• ✅ Community/public resource sections render via SSR without waiting on wallet connection
• ✅ Wallet-dependent sections hydrate correctly client-side once connected
• ✅ Measured LCP/TTFB improvement documented above

[Lakes41]

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Please update the branch with the latest base branch and resolve the conflicts.

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