[Frontend] Document wallet integration behavior

[floxxih]

Create docs for wallet connect flows, expected errors, and network/account change handling.

Acceptance Criteria:

• Happy path and failure cases are covered
• UX copy recommendations included
• Links to relevant source files

[Favourof]

@Favourof has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi, Will love to work on this issue.

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[Codekill33]

@Codekill33 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello, I'd like to work on this issue. I will document wallet connection flows, expected errors, network/account change handling, include UX copy recommendations, and link relevant source files.
Kindly assign me to this task. Thanks!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Codekill33 to this issue.

[goldandrew]

@goldandrew has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello, can I work on this issue?

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[drips-wave]

Congratulations, @goldandrew! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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[drips-wave]

This issue has been completed by @goldandrew as part of the Stellar Wave Program's 5th Wave 🥳

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