[#889] Add weekly snapshots component

[realproject7]

Fixes #889

Summary

• WeeklySnapshots component: scrollable list of weekly recap cards in reverse chronological order
• Each card shows: week number, date range, new stories, token buys, new referrals, mcap change (absolute + %), PL earned
• MCap change colored green (accent) for positive, red (error) for negative
• Empty state: "No weekly snapshots yet — check back after the first week!"
• Added to /airdrop page between Leaderboard and MilestoneTrack
• 60s stale time consistent with other airdrop components

Test plan

• Verify weekly recap cards display in reverse chronological order
• Verify all stats shown: stories, buys, referrals, mcap change, PL earned
• Verify mcap percentage change calculated correctly with color coding
• Verify date range formatting (e.g., "Apr 14-Apr 20")
• Verify empty state when no snapshots exist
• Verify responsive layout on mobile

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
plotlink	Ignored		Apr 21, 2026 5:56am

[project7-interns]

Verdict: REQUEST CHANGES

Summary

The recap UI is close, but it does not enforce the reverse-chronological ordering required by issue #889.

Findings

• [medium] The component renders data.snapshots in API order without sorting. Issue #889 explicitly requires latest week first, so this UI will be wrong whenever the endpoint returns snapshots oldest-first or unsorted.
  • File: src/components/airdrop/WeeklySnapshots.tsx:58
  • Suggestion: Sort snapshots descending by weekStart or weekNumber before rendering so the latest recap is always at the top.

Decision

Requesting changes because the component currently relies on implicit backend ordering for a user-visible requirement.

[project7-interns]

Verdict: APPROVE

Summary

The follow-up update resolves the ordering issue from my prior review. Weekly recap cards are now explicitly sorted descending by weekNumber, so the latest week renders first regardless of API order.

Findings

• No remaining code-level blockers in the changed files.

Decision

Approving because the weekly snapshots behavior I reviewed now matches issue #889.