docs: fix accuracy & consistency issues across EVM and Learn docs

[alexander-sei]

What is the purpose of the change?

Correct existing documentation. This is a review pass that fixes small, concrete accuracy and consistency issues — no new content and no deletions.

Describe the changes to the documentation

• Gas — minimum gas price (differences-with-ethereum): resolves a direct contradiction (one page said legacy txs need 10 gwei, others said 50 gwei). Now points to the governance-set floor (50 gwei) and tells devs to query eth_gasPrice. Verified against live mainnet: eth_gasPrice returns 55 gwei (50 gwei floor + tip).
• Ethereum comparison numbers (evm/index, migrate-from-other-evms): Ethereum throughput corrected to ~5 MGas/s and block time to ~12 s (60M block gas limit / 12s slots, post-Fusaka), and the throughput multiplier recomputed to 20× (100 ÷ 5). Sei stays at 100 MGas/s.
• Finality terminology: standardized on the existing dominant term "instant finality", and comparison tables now show "Instant (~400 ms)" consistently (differences-with-ethereum, reference, migrate-from-other-evms).
• Native token labels (dev-gas, transactions-with-seid): relabel ETH → SEI in examples/flag descriptions.
• Accounts (learn/accounts): intro now clarifies that the two addresses hold separate balances until association, instead of implying they are always unified.
• Explorer name: standardize Seitrace → Seiscan (ai/sei-skill/*, cambrian-agent-kit).
• Hardhat (evm-verify-contracts): align the keystore variable to SEI_PRIVATE_KEY so it matches the deploy tutorial.
• wagmi (dev-gas): update the sendTransaction snippet to the wagmi v2 API (@wagmi/core, config-first, parseEther/parseGwei, gas not gasLimit).

Target audience: EVM developers building/migrating to Sei.

Notes

• typos passes on all changed files.
• A separately flagged item — keyword strings appearing glued to headings — was investigated and traced to the Mintlify search-index representation, not the source .mdx or generated llms-full.txt (both are clean). Intentionally no change here; the keywords frontmatter is valid SEO metadata.
• llms.txt / llms-full.txt are generated from these sources and are not regenerated in this PR. If a refresh is required before merge, run the repo's generation step (scripts/generate-llms.mjs) — happy to add that as a follow-up commit.

🤖 Generated with Claude Code

[cursor]

PR Summary

Low Risk
Markdown documentation and code-sample edits only; no runtime, auth, or on-chain behavior changes.

Overview
This PR is a documentation accuracy pass across EVM and Learn pages—no new features, only wording and example fixes.

Gas and Ethereum comparisons: differences-with-ethereum now documents legacy transactions against Sei’s governance minimum gas price (~50 gwei) and tells developers to use eth_gasPrice instead of the outdated 10 gwei figure. evm/index and migrate-from-other-evms update Ethereum to ~12 s blocks and ~5 MGas/s throughput and reframe the Sei advantage as ~20× (not 33×).

Finality and tokens: Comparison tables and prose consistently use “Instant (~400 ms)” where instant finality is described. Examples that said ETH for native value are relabeled SEI in dev-gas and transactions-with-seid.

Accounts, tooling, and branding: learn/accounts clarifies that 0x… and sei1… keep separate balances until association. Hardhat verify config uses SEI_PRIVATE_KEY to match deploy docs; the wagmi snippet in dev-gas is updated to wagmi v2 (@wagmi/core, parseEther/parseGwei). Explorer references are standardized from Seitrace to Seiscan in AI/sei-skill and Cambrian agent kit pages.

^{Reviewed by Cursor Bugbot for commit 3d06c7e. Bugbot is set up for automated code reviews on this repo. Configure here.}

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