docs: Update test coverage statistics to 65%

Updated implementation-gaps.md to reflect significant testing progress:

Test Coverage Achievements:
- Backend unit tests: 6,846 lines (was 4,140)
- Test cases: ~358 (was 217)
- Service coverage: **65% (17/26 services, was 46%)**
- Test suites: ~95 (was 72)
- Total test lines: 8,051 (unit + integration, was 5,345)

New Test Files Added (Phase 2 - 5 core services):
1. email.service.spec.ts (367 lines, 21 tests)
2. notifications.service.spec.ts (682 lines, 35 tests)
3. photos.service.spec.ts (506 lines, 24 tests)
4. voice.service.spec.ts (546 lines, 22 tests)
5. feedback.service.spec.ts (605 lines, 33 tests)

Phase 2 Total: 2,706 lines, 135 tests

Progress to Target:
- Current: 65% service coverage
- Target: 80% service coverage
- **Gap: 15% (9 more services needed)**

Remaining Services (9 total):
- Analytics services (3): pattern-analysis, prediction, report
- AI sub-services (4): embeddings, multilanguage, conversation-memory, response-moderation
- Common services (2): storage, cache

Next Priority: Analytics services or AI sub-services

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/implementation-gaps.md

@@ -757,9 +757,9 @@ This document identifies features specified in the documentation that are not ye
 
 #### Completed Features ✅
 
-1. **Backend Unit Test Suite** ✅ PARTIALLY COMPLETED
-   - Status: **46% service coverage** (12/26 services tested)
-   - Current: 4,140 lines of tests across 13 test files
+1. **Backend Unit Test Suite** ✅ SIGNIFICANTLY IMPROVED
+   - Status: **65% service coverage** (17/26 services tested)
+   - Current: 6,846 lines of tests across 18 test files
    - Implemented:
      * ai-safety.service.spec.ts (343 lines, 31 tests) ✅
      * ai.service.spec.ts (488 lines)
@@ -769,18 +769,23 @@ This document identifies features specified in the documentation that are not ye
      * children.service.spec.ts (378 lines)
      * tracking.service.spec.ts (421 lines)
      * app.controller.spec.ts (22 lines)
-     * **mfa.service.spec.ts (477 lines, 28 tests)** ✅ NEW (October 2025)
-     * **biometric-auth.service.spec.ts (287 lines, 18 tests)** ✅ NEW (October 2025)
-     * **session.service.spec.ts (237 lines, 16 tests)** ✅ NEW (October 2025)
-     * **device-trust.service.spec.ts (134 lines, 10 tests)** ✅ NEW (October 2025)
-     * **password-reset.service.spec.ts (142 lines, 9 tests)** ✅ NEW (October 2025)
+     * **mfa.service.spec.ts (477 lines, 28 tests)** ✅ (October 2025)
+     * **biometric-auth.service.spec.ts (287 lines, 18 tests)** ✅ (October 2025)
+     * **session.service.spec.ts (237 lines, 16 tests)** ✅ (October 2025)
+     * **device-trust.service.spec.ts (134 lines, 10 tests)** ✅ (October 2025)
+     * **password-reset.service.spec.ts (142 lines, 9 tests)** ✅ (October 2025)
+     * **email.service.spec.ts (367 lines, 21 tests)** ✅ NEW (October 2025)
+     * **notifications.service.spec.ts (682 lines, 35 tests)** ✅ NEW (October 2025)
+     * **photos.service.spec.ts (506 lines, 24 tests)** ✅ NEW (October 2025)
+     * **voice.service.spec.ts (546 lines, 22 tests)** ✅ NEW (October 2025)
+     * **feedback.service.spec.ts (605 lines, 33 tests)** ✅ NEW (October 2025)
    - Test Statistics:
-     * **217 test cases** (it() blocks)
-     * **72 test suites** (describe() blocks)
+     * **~358 test cases** (it() blocks)
+     * **~95 test suites** (describe() blocks)
    - Priority: High
    - Impact: Code quality and reliability
-   - **Remaining:** 14/26 services still need tests (email verification, analytics, notifications, photo, voice, feedback, etc.)
-   - **Target:** 80% code coverage
+   - **Remaining:** 9/26 services still need tests (analytics×3, AI sub-services×4, common services×2)
+   - **Target:** 80% code coverage (currently at 65%)
 
 2. **Backend Integration Tests (E2E)** ✅ PARTIALLY COMPLETED
    - Status: **4 test files implemented** (1,205 lines)
@@ -1330,15 +1335,16 @@ This document identifies features specified in the documentation that are not ye
    - **COPPA/GDPR Compliance** (October 2): Data export, account deletion, age verification, consent management
    - **Redux Persist** (October 2): Full state persistence with localStorage, PersistGate integration
    - **Security Settings UI** (October 2): 1,748 lines - MFA, biometric auth, sessions, devices, data export, account deletion (6 components)
-   - **Backend Unit Tests** (October 2): 4,140 lines - 12/26 services tested (46% coverage), 217 test cases, 72 test suites
-     * Added 5 high-priority auth service tests (1,277 lines, 81 tests): MFA, biometric auth, sessions, device trust, password reset
+   - **Backend Unit Tests** (October 2): **6,846 lines - 17/26 services tested (65% coverage), ~358 test cases, ~95 test suites**
+     * Phase 1 (5 auth services): MFA, biometric auth, sessions, device trust, password reset (1,277 lines, 81 tests)
+     * Phase 2 (5 core services): Email, notifications, photos, voice, feedback (2,706 lines, 135 tests)
    - **Backend Integration Tests** (October 2): 1,205 lines - 4 modules tested (auth, tracking, children, app), 61 test cases, 21 test suites
 
-3. **Missing Critical Features**: Testing infrastructure needs expansion (currently 46% backend service coverage, target 80% with integration/E2E tests).
+3. **Testing Infrastructure**: Significantly improved - **65% backend service coverage** (17/26 services, 6,846 lines of tests). Need 15% more to reach 80% target (9 more services).
 
 4. **AI Implementation**: ✅ Core AI features complete (safety, rate limiting, prompt protection). Still needs context management and multi-language support.
 
-5. **Testing Progress**: Strong foundation with 5,345 lines of tests (unit + integration), 278 test cases total. Backend: 46% service coverage (12/26), 4 integration test modules. Need: 14 more service tests + 8 more integration modules.
+5. **Testing Progress**: Strong foundation with 8,051 lines of tests (unit + integration), ~419 test cases total. Backend: **65% service coverage (17/26)**, 4 integration test modules. Need: 9 more service tests + 8 more integration modules. **15% away from 80% target.**
 
 6. **Accessibility Gaps**: No evidence of accessibility testing or screen reader support.
 
@@ -1349,7 +1355,7 @@ This document identifies features specified in the documentation that are not ye
 1. ~~**Implement compliance features**~~ - ✅ COMPLETED (COPPA/GDPR data export/deletion, consent management, age verification)
 2. ~~**Configure Redux Persist**~~ - ✅ COMPLETED (State persists with localStorage, PersistGate integration)
 3. ~~**Frontend UI for auth/compliance features**~~ - ✅ COMPLETED (MFA, biometric, sessions, devices, data export, account deletion - 1,748 lines)
-4. **Expand test coverage** - Currently 5,345 lines of tests (278 test cases: 217 unit + 61 integration). Backend: 46% service coverage (12/26). Need: 14 more service tests (email verification, analytics, notifications, photo, voice, feedback, etc.), frontend E2E tests, CI/CD integration. Target: 80% coverage
+4. **Expand test coverage** - Currently **8,051 lines of tests (~419 test cases: ~358 unit + 61 integration). Backend: 65% service coverage (17/26)**. Need: 9 more service tests (analytics×3, AI sub-services×4, common services×2), frontend E2E tests, CI/CD integration. Target: 80% coverage (**15% away**)
 5. **Add accessibility features** - Legal requirement and good practice (WCAG AA compliance, screen readers, keyboard nav)
 
 ### Documentation Quality