Writer Stats: rename to 'Donations Received' + add 'Royalties Claimed' row

[realproject7]

Changes to Writer Stats dashboard (Image 248)

1. Rename donation info

Current: `Received: 150.00 PLOT ($2.49)`
After: `Donations Received: 150.00 PLOT ($2.49)`

2. Add Royalties Claimed total below

Add a new row showing the sum of all claimed royalties across all storylines:

```
Donations Received: 150.00 PLOT ($2.49)
Royalties Claimed: 4.23 PLOT ($0.070)
```

This is the cumulative total of royalties the writer has claimed so far (already available from the `claimedRoyalties` query on the profile page — it reads `getRoyaltyInfo` which returns both unclaimed and total claimed).

Keep it simple: just display the existing `claimedRoyalties` value that's already fetched. No new queries needed — the data is already on the page (used in the wallet card).

Files to modify

• `src/app/profile/[address]/page.tsx` — Writer Stats section

Branch

`task/750-writer-stats-labels`

Self-Verification (T3)

• "Received" renamed to "Donations Received"
• "Royalties Claimed" row added with PLOT + USD value
• Uses existing `claimedRoyalties` data (no new queries)
• Mobile: doesn't overflow
• `npm run build` passes