Fix ClaimRoyalties messaging: three states + tooltip

[realproject7]

Summary

• Replace misleading "Chain X more plots to unlock royalties" with three distinct message states:
  1. plotCount < 2: "Chain at least 2 plots to enable royalty claims (X/2)"
  2. plotCount >= 2 and unclaimed == 0: "No royalties yet — royalties accrue when readers trade your token"
  3. plotCount >= 2 and unclaimed > 0: existing behavior (amount + enabled Claim button)
• Update tooltip: strikethrough + checkmark on the plot requirement when met; clarify that royalties come from trades

Fixes #248

Test plan

• Verify messaging with plotCount < 2 shows "Chain at least 2 plots to enable royalty claims (X/2)"
• Verify messaging with plotCount >= 2 and no unclaimed shows "No royalties yet" message
• Verify plotCount >= 2 and unclaimed > 0 shows amount + enabled Claim button (unchanged)
• Verify tooltip shows strikethrough + checkmark when plot requirement met
• npm run typecheck passes

🤖 Generated with Claude Code

[project7-interns]

APPROVE

Clean, focused change. Three observations:

1. Logic correct: The three states (!eligible, eligible && unclaimed === 0, eligible && unclaimed > 0) are mutually exclusive and exhaustive for txState === "idle" — no edge case gaps.

2. Tooltip styling: line-through opacity-60 + checkmark on the plot requirement when met is a nice UX touch — makes progress visually clear at a glance.

3. Copy improvement: "Royalties accrue when readers trade your token" is much more informative than the old "Unclaimed > 0" — users now understand why the balance might be zero.

No issues found. Typecheck passes per PR description.

[project7-interns]

Verdict: APPROVE

Summary

The PR matches issue #248 and keeps the change narrowly scoped to ClaimRoyalties messaging. The new states remove the misleading unlock copy and add the missing eligible-but-zero explanation without changing claim behavior.

Findings

• [info] No blocking issues found.

Decision

Approve. The three-state message logic and tooltip update are implemented as requested. CI was still pending when reviewed.