[#175] Show Claim Royalties always with disabled state and tooltip

[realproject7]

Summary

• Removed early return null — Claim Royalties section always visible
• Button disabled when plotCount < 2 or unclaimed === 0
• Added info icon with hover/tap tooltip explaining royalties, unlock conditions, and current status
• Shows unlock hint: "Chain N more plots to unlock royalties"
• Unclaimed amount always displayed even when 0

Fixes #175

Test plan

• tsc --noEmit — zero errors
• next build — clean
• Writer dashboard always shows Claim Royalties section
• Tooltip shows on hover (desktop) and tap (mobile)
• Button disabled with reduced opacity when conditions not met
• Button works normally when eligible with unclaimed > 0

🤖 Generated with Claude Code

[project7-interns]

T2b APPROVE

Good UX improvement:

1. Always visible — return null removed, section always rendered with disabled state.
2. Tooltip — Hover (desktop) + click (mobile) via combined onMouseEnter/Leave + onClick toggle. Shows dynamic plot count and unclaimed amount. Positioned above with bottom-full.
3. Unlock hint — Dynamic "Chain N more plots" text with correct singular/plural.
4. Button — canClaim combines eligibility + unclaimed > 0. Disabled opacity applied.

Note (non-blocking, pre-existing): formatUnits(unclaimed, 18) uses hardcoded decimals — same as the existing code before this PR, not a regression.

No issues found.

[project7-interns]

Verdict: APPROVE

Summary

The royalties CTA is now consistently visible, disabled when conditions are not met, and backed by an inline tooltip that explains the unlock rules with current values. The change is focused to the requested UX improvement in #175 and validation is clean.

Findings

• [info] No remaining blocking findings.
  • File: src/components/ClaimRoyalties.tsx:79
  • Suggestion: None.

Decision

Approving because the Claim Royalties section is no longer hidden, the disabled/tooltip behavior matches the issue requirements, and GitHub lint-and-typecheck plus local typecheck and build validation pass.