chore(wallets): extract WalletRow, RenameWallet and AddWallet into components

[CassioMG]

Why this PR exists

This is the first step of the Home refresh project. That work redesigns the Home screen plus
six related screens, and it's being split into small, independently reviewable PRs rather than one
large one.

Three of those upcoming PRs each restyle a different piece of the Wallets screen:

Upcoming PR	Restyles
Wallets list	the account rows + a new 4-button header
Rename modal	the rename dialog
Add wallet	the "add a wallet" sheet

The problem: all three of those components currently live in the same 494-line file,
views/Wallets/index.tsx. Three PRs rewriting one file would conflict on every merge, and each
review would show the other two PRs' churn as noise.

This PR splits that file so those three PRs can each touch a different file and be reviewed on
their own.

What this PR does

Pure extraction — no behavior changes. Nothing about the app changes: same rendered DOM, same
CSS, same props, same analytics. Only which file the code lives in.

Three components move out of views/Wallets/index.tsx into their own directories, following the
existing convention of the 28 other components already under popup/components/account/:

Demo sample (no behavior changes)

pr0-code-extraction.mov

Deliberately not done

• No new unit tests. These components are moved, not written. The existing
  loadAccount.test.ts flow is the regression guard, and any test written against the ellipsis
  dropdown would be deleted by the Wallets-list PR, which removes that dropdown.
• Four dead/undefined CSS classes are carried unchanged — .Wallets__fail,
  .detail-indentifier (typo'd, no consumer), .WalletRow__options-actions, and
  .AddWallet__row-link. Removing them would have changed the compiled CSS and forfeited the
  equivalence check above. Each is assigned to the follow-up PR that rewrites its area.
• Two pre-existing 'await' has no effect warnings in views/Wallets/index.tsx are left
  alone. They come from await dispatch(...) on plain createSlice actions and are unchanged
  from master — only their line numbers shifted. The Wallets-list PR rewrites that exact block
  and will clean them up.

Merge note for the follow-ups

The three follow-up PRs each own a different component file, but all three still touch small
regions of views/Wallets/styles.scss (the two overlay wrapper classes plus the dropdown block
being deleted). Merging Wallets list → Rename modal → Add wallet in that order keeps the
rebases trivial.

🤖 Generated with Claude Code

[github-actions]

PR Preview build is ready: https://github.com/stellar/freighter/releases/tag/untagged-8e3e0781bee67998aacf (SDF collaborators only — install instructions in the release description)

[Copilot]

Pull request overview

Extracts Wallets subcomponents into dedicated account component directories without changing behavior.

Changes:

• Extracts WalletRow, RenameWallet, and AddWallet.
• Moves component-specific styles alongside each component.
• Retains parent-owned overlay and dropdown styles in the Wallets view.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
views/Wallets/index.tsx	Uses extracted components.
views/Wallets/styles.scss	Retains view-level styles.
components/account/WalletRow/index.tsx	Defines the extracted wallet row.
components/account/WalletRow/styles.scss	Holds wallet-row styles.
components/account/RenameWallet/index.tsx	Defines the extracted rename form.
components/account/RenameWallet/styles.scss	Holds rename-form styles.
components/account/AddWallet/index.tsx	Defines the extracted add-wallet view.
components/account/AddWallet/styles.scss	Holds add-wallet styles.

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[CassioMG]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

🤖 Generated with Claude Code

[CassioMG]

Merged this right away since it's pure component extraction verbatim with no behavior change to unblock other work as described on the PR