[QA] apply account creation ECDSA / EVM-address-from-public-key messaging to tutorial pages

### Which tab?

Native SDKs

### Page URL or path

native/tutorials/getting-started/create-fund-account.mdx

### What's the problem?

the two canonical pages (`native/accounts/create.mdx`, `learn/core-concepts/accounts/account-creation.mdx`) already pass the CLAUDE.md 4-point rule.

the tutorial pages do not clearly lead with the ECDSA / EVM-address-from-public-key benefit: `native/tutorials/getting-started/create-fund-account.mdx`, `native/tutorials/getting-started/auto-create-accounts.mdx`, `learn/core-concepts/accounts/auto-account-creation.mdx`.

### Suggested fix (optional)

**scope**

- bring the three pages in line with the priority order: positive default → immutability → recovery model → key-rotation conditional.
- use / next to recommended code; reserve for genuine anti-patterns; positive comment framing.

**acceptance**

- all three pages lead with the benefit and cover the four points.
- reviewer confirms against the CLAUDE.md checklist.