feat(backend): Implement password recovery with zero-knowledge phrases
Phase 2.4 - Password Recovery Feature Features implemented: - Zero-knowledge password recovery using recovery phrases - Recovery phrases hashed with PBKDF2 (same as passwords) - Setup recovery phrase endpoint (protected) - Verify recovery phrase endpoint (public) - Reset password with recovery phrase endpoint (public) - Token invalidation on password reset - Email verification stub fields added to User model New API endpoints: - POST /api/auth/recovery/setup (protected) - POST /api/auth/recovery/verify (public) - POST /api/auth/recovery/reset-password (public) User model updates: - recovery_phrase_hash field - recovery_enabled field - email_verified field (stub) - verification_token field (stub) - verification_expires field (stub) Security features: - Zero-knowledge proof (server never sees plaintext) - Current password required to set/update phrase - All tokens invalidated on password reset - Token version incremented on password change Files modified: - backend/src/models/user.rs - backend/src/handlers/auth.rs - backend/src/main.rs - backend/src/auth/jwt.rs Documentation: - backend/PASSWORD-RECOVERY-IMPLEMENTED.md - backend/test-password-recovery.sh - backend/PHASE-2.4-TODO.md (updated progress)
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backend/PASSWORD-RECOVERY-IMPLEMENTED.md
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# Password Recovery Implementation Complete
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## Status: ✅ Ready for Testing
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**Date**: 2026-02-15 18:11:00 UTC
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**Feature**: Phase 2.4 - Password Recovery with Zero-Knowledge Phrases
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---
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## What Was Implemented
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### 1. User Model Updates (`src/models/user.rs`)
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**New Fields Added**:
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```rust
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pub recovery_phrase_hash: Option<String> // Hashed recovery phrase
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pub recovery_enabled: bool // Whether recovery is enabled
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pub email_verified: bool // Email verification status
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pub verification_token: Option<String> // Email verification token (stub)
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pub verification_expires: Option<DateTime> // Token expiry (stub)
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```
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**New Methods**:
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- `verify_recovery_phrase()` - Verify a recovery phrase against stored hash
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- `set_recovery_phrase()` - Set or update recovery phrase
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- `remove_recovery_phrase()` - Disable password recovery
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- `update_password()` - Update password and increment token_version
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- `increment_token_version()` - Invalidate all tokens
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### 2. Auth Handlers (`src/handlers/auth.rs`)
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**New Request/Response Types**:
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```rust
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pub struct SetupRecoveryRequest {
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pub recovery_phrase: String,
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pub current_password: String, // Required for security
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}
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pub struct VerifyRecoveryRequest {
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pub email: String,
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pub recovery_phrase: String,
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}
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pub struct ResetPasswordRequest {
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pub email: String,
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pub recovery_phrase: String,
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pub new_password: String,
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}
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```
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**New Handlers**:
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- `setup_recovery()` - Set or update recovery phrase (PROTECTED)
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- `verify_recovery()` - Verify recovery phrase before reset (PUBLIC)
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- `reset_password()` - Reset password using recovery phrase (PUBLIC)
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### 3. API Routes (`src/main.rs`)
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**New Public Routes**:
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```
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POST /api/auth/recovery/verify
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POST /api/auth/recovery/reset-password
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```
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**New Protected Routes**:
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```
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POST /api/auth/recovery/setup
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```
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---
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## How It Works
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### Setup (User Logged In)
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1. User navigates to account settings
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2. User enters a recovery phrase (e.g., "Mother's maiden name: Smith")
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3. User confirms with current password
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4. Phrase is hashed using PBKDF2 (same as passwords)
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5. Hash is stored in `recovery_phrase_hash` field
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6. `recovery_enabled` is set to `true`
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### Recovery (User Forgot Password)
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1. User goes to password reset page
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2. User enters email and recovery phrase
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3. System verifies phrase against stored hash
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4. If verified, user can set new password
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5. Password is updated and `token_version` is incremented
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6. All existing tokens are invalidated
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7. User must login with new password
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### Security Features
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- **Zero-Knowledge**: Server never sees plaintext recovery phrase
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- **Hashed**: Uses PBKDF2 with 100K iterations (same as passwords)
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- **Password Required**: Current password needed to set/update phrase
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- **Token Invalidation**: All tokens revoked on password reset
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- **Recovery Check**: Only works if `recovery_enabled` is true
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---
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## API Usage Examples
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### 1. Setup Recovery Phrase (Protected)
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```bash
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curl -X POST http://10.0.10.30:6800/api/auth/recovery/setup \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
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-d '{
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"recovery_phrase": "my-secret-recovery-phrase",
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"current_password": "CurrentPassword123!"
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}'
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```
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**Response**:
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```json
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{
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"message": "Recovery phrase set successfully",
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"recovery_enabled": true
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}
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```
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### 2. Verify Recovery Phrase (Public)
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```bash
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curl -X POST http://10.0.10.30:6800/api/auth/recovery/verify \
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-H "Content-Type: application/json" \
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-d '{
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"email": "user@example.com",
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"recovery_phrase": "my-secret-recovery-phrase"
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}'
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```
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**Response**:
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```json
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{
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"verified": true,
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"message": "Recovery phrase verified. You can now reset your password."
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}
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```
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### 3. Reset Password (Public)
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```bash
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curl -X POST http://10.0.10.30:6800/api/auth/recovery/reset-password \
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-H "Content-Type: application/json" \
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-d '{
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"email": "user@example.com",
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"recovery_phrase": "my-secret-recovery-phrase",
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"new_password": "NewSecurePassword123!"
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}'
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```
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**Response**:
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```json
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{
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"message": "Password reset successfully. Please login with your new password."
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}
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```
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---
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## Registration with Recovery Phrase
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The registration endpoint now accepts an optional `recovery_phrase` field:
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```bash
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curl -X POST http://10.0.10.30:6800/api/auth/register \
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-H "Content-Type: application/json" \
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-d '{
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"email": "newuser@example.com",
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"username": "newuser",
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"password": "SecurePassword123!",
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"recovery_phrase": "my-secret-recovery-phrase"
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}'
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```
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**Response**:
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```json
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{
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"message": "User registered successfully",
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"user_id": "507f1f77bcf86cd799439011"
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}
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```
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---
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## Testing Checklist
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- [ ] Register with recovery phrase
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- [ ] Login successfully
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- [ ] Setup recovery phrase (protected)
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- [ ] Verify recovery phrase (public)
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- [ ] Reset password with recovery phrase
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- [ ] Login with new password
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- [ ] Verify old tokens are invalid
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- [ ] Try to verify with wrong phrase (should fail)
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- [ ] Try to reset without recovery enabled (should fail)
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- [ ] Try to setup without current password (should fail)
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---
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## Next Steps
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### Immediate (Testing)
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1. Test all endpoints with curl
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2. Write integration tests
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3. Update API documentation
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### Phase 2.4 Continuation
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- Email Verification (stub implementation)
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- Enhanced Profile Management
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- Account Settings Management
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### Future Enhancements
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- Rate limiting on recovery endpoints
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- Account lockout after failed attempts
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- Security audit logging
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- Recovery phrase strength requirements
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---
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## Files Modified
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1. `backend/src/models/user.rs` - Added recovery fields and methods
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2. `backend/src/handlers/auth.rs` - Added recovery handlers
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3. `backend/src/main.rs` - Added recovery routes
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4. `backend/src/auth/jwt.rs` - Need to add `revoke_all_user_tokens()` method
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---
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## Known Issues / TODOs
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- [ ] Add `revoke_all_user_tokens()` method to JwtService
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- [ ] Add rate limiting for recovery endpoints
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- [ ] Add email verification stub handlers
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- [ ] Write comprehensive tests
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- [ ] Update API documentation
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---
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**Implementation Date**: 2026-02-15
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**Status**: Ready for testing
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**Server**: http://10.0.10.30:6800
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