Feature Parity 10: Wallet Import/Open Flow Completion

[johnny9]

Summary

Finish wallet import/open flow so users can import/open existing wallets end-to-end.

Complexity

• XL

Dependencies

• 01
• 02

Global Constraints

• All implementation lives under gui-qml/.
• No GUI runtime dependency on bitcoin/src/qt components. Reused logic must be moved/ported into gui-qml/.
• Do not change interfaces::Wallet or interfaces::Node in this version.
• Issue completion must satisfy DefinitionOfDone.md.

Scope

• Wire Import wallet action in CreateWalletWizard.qml.
• Add wallet source selection UX (wallet dir selection/list + validation).
• Load wallet via walletLoader().loadWallet with clear warnings/errors.
• Update wallet selector state and initial load UX for no-wallet/failed-wallet scenarios.

Acceptance Criteria (DoD-Aligned)

1. Import/open path is functional from UI entry point to selected wallet ready state.
2. Invalid path/corrupt wallet/duplicate load cases are explicitly handled.
3. UI remains responsive during load operations.

Required Tests

• C++ unit tests: Unit tests for wallet loading adapter and error classification.
• QML QTest: QTests for import wizard states and error dialogs.
• Python E2E (qml/test/testbridge.h): E2E flow: import existing wallet -> switch wallet -> validate activity/balance view updates.

Implementation Notes

• Use existing interfaces::WalletLoader only; no interface additions.

[johnny9]

https://bitcoincore.app/milestones/1-3-import/

[johnny9]

https://www.figma.com/design/fmpjcEftcnyXudd4cbce20/Bitcoin-Core-App-Design--Copy-?node-id=7516-13169&p=f&t=sdSfh0EmRHMXRx8L-0