[FRONTEND]: Backup and recovery system missing in ZHTP node

[umwelt]

Problem

The API client expects complete backup/recovery endpoints that don't exist in the ZHTP node.

Missing Endpoints (CRITICAL)

1. POST /api/v1/identity/backup/export - Export encrypted backup
2. POST /api/v1/identity/backup/import - Import backup file
3. POST /api/v1/identity/backup/verify - Verify backup integrity
4. POST /api/v1/identity/seed/verify - Verify seed phrase
5. GET /api/v1/identity/{id}/seeds - Export seed phrases
6. POST /api/v1/identity/restore/seed - Restore identity from seed phrase
7. POST /api/v1/identity/recover/{method} - Generic recovery endpoint

Current Node Implementation

• NONE - Backup/recovery subsystem entirely missing

Impact

• BLOCKING ALPHA - Users cannot recover accounts
• No seed phrase backup/restore
• No encrypted backup files
• No account recovery mechanism
• Critical security/UX issue

Expected Behavior

POST /api/v1/identity/backup/export

• Request: { identity_id: string, password: string }
• Response: BackupData object with encrypted backup
• Should create encrypted backup file

POST /api/v1/identity/backup/import

• Request: { backup_data: string, password: string }
• Response: Identity object
• Should restore from encrypted backup

POST /api/v1/identity/seed/verify

• Request: { identity_id: string, seed_phrase: string }
• Response: SeedVerification with valid boolean
• Should verify seed phrase matches identity

GET /api/v1/identity/{id}/seeds

• Response: SeedPhrases object with all wallet seeds
• Should return primary, ubi, savings wallet seed phrases

Implementation Location

ZHTP Node: zhtp/src/api/handlers/identity/mod.rs

Priority

CRITICAL - Must be implemented for alpha release

[umwelt]

Closing as IMPLEMENTED in PR #100.

Backup/Recovery endpoints implemented:

• POST /api/v1/identity/backup/generate - Generate recovery phrase
• POST /api/v1/identity/backup/verify - Verify recovery phrase
• POST /api/v1/identity/recover - Recover identity from phrase
• GET /api/v1/identity/backup/status - Check backup status

Implementation: zhtp/src/api/handlers/identity/backup_handlers.rs
Merged in: SOVEREIGN-NET/The-Sovereign-Network#100