fix: show in-view rank indicator when leaderboard filters are active (#1102)

[alpurkan17]

Summary

The Rank column on Top Miners / Discoveries leaderboards always shows the global rank. When a filter is active, consecutive rows show gaps (16, 19, 23, 48, 94) with no UI indication that the gaps are caused by filtered-out miners. Users reasonably interpret this as a bug.

Fix (Option A): add a subtle "·N in view" indicator next to the global rank when filters are active and the two ranks diverge.

Changes

• types.ts: add viewRank to MinerStats — 1-indexed position in filtered subset
• TopMinersTable.tsx: compute viewRank only when a search/eligibility filter is active
• MinersList.tsx: show ·{viewRank} beside the RankIcon in list view
• MinerCard.tsx: show ·{viewRank} in view next to the global rank on cards

Edge cases

• No filter active → no indicator shown
• First row (rank=viewRank=1) → no indicator shown
• Pure search filter → indicator shown for mismatched rows
• Both search + eligibility → indicator shown correctly
• No backend changes — computed entirely in frontend

Validation

• 4 files, +52/−6, no new dependencies
• Null-guarded: viewRank != null before comparison
• Both card view and list view covered

Closes #1102

[alpurkan17]

@anderdc @LandynDev ready for review