feat(mobile): redesign wallet demos around review sheets

[szijpeter]

Summary

• redesigns the Compose Android, Compose iOS, and native SwiftUI demos as credentials-first reference wallets
• moves Receive and Present into focused sheets with explicit offer and disclosure review before protocol actions
• keeps capture, consent, retry, rejection, and success states inside one interaction flow instead of permanent navigation tabs

Scope

• adds shared Compose interaction state, request-capture sheets, pinned consent actions, safe flow switching, and explicit replacement for competing deep links
• aligns the native SwiftUI demo with the same receive and presentation model, including transaction-code handling and deterministic UI scenarios
• integrates the preview-session lifecycle from #1938 on top of the moving metadata-preview baseline in #1926
• emits raw platform public-key representations for mobile did:key creation so platform-backed P-256 credentials can be issued and presented successfully

Caveats and follow-ups

• the screenshot gallery is pending human upload through the GitHub PR editor's user-attachments
• plain authorization requests that do not bind client_id to their response destination remain blocked with an explicit safe error state

Breaking changes

None.

Screenshots

Pending user-attachments upload from the prepared local Android, Compose iOS, and native iOS gallery.

[linear-code]

WAL-747

[coderabbitai]

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud