Add 36 new E2E tests across 5 test files

New E2E test files:
- e2e/health.spec.ts: 3 tests for health/observability endpoints
- e2e/history.spec.ts: 7 tests for history page
- e2e/plan.spec.ts: 7 tests for exercise plan page
- e2e/decision-engine.spec.ts: 8 tests for decision display and overrides
- e2e/cycle.spec.ts: 11 tests for cycle tracking, settings, and period logging

Total E2E tests: 100 (up from 64)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

IMPLEMENTATION_PLAN.md

@@ -4,7 +4,7 @@ This file is maintained by Ralph. Run `./ralph-sandbox.sh plan 3` to generate ta
 
 ## Current State Summary
 
-### Overall Status: 1005 unit tests passing across 50 test files + 64 E2E tests across 6 files
+### Overall Status: 1005 unit tests passing across 50 test files + 100 E2E tests across 12 files
 
 ### Library Implementation
 | File | Status | Gap Analysis |
@@ -697,7 +697,7 @@ Testing, error handling, and refinements.
 ### P3.10: E2E Test Suite ✅ COMPLETE (See P5.4)
 - [x] Comprehensive end-to-end tests
 - **Files:**
-  - `e2e/*.spec.ts` - Full user flows (64 tests across 6 files)
+  - `e2e/*.spec.ts` - Full user flows (100 tests across 12 files)
 - **Test Scenarios:**
   - Login flow
   - Period logging and phase calculation
@@ -879,7 +879,7 @@ P4.* UX Polish ────────> After core functionality complete
 | Done | P4.6 Rate Limiting | Complete | Client-side rate limiting implemented |
 | Done | P5.1 Period History UI | Complete | Page + 3 API routes with 61 tests |
 | Done | P5.3 CI Pipeline | Complete | Lint, typecheck, tests in Gitea Actions |
-| Done | P5.4 E2E Tests | Complete | 64 tests across 6 files |
+| Done | P5.4 E2E Tests | Complete | 100 tests across 12 files |
 | Done | P5.2 Toast Notifications | Complete | sonner library + 23 tests |
 
 **All P0-P5 items are complete. The project is feature complete.**
@@ -1109,7 +1109,13 @@ These items were identified during gap analysis and have been completed.
   - `e2e/settings.spec.ts` - 15 tests for settings and Garmin configuration
   - `e2e/period-logging.spec.ts` - 9 tests for period history and API auth
   - `e2e/calendar.spec.ts` - 13 tests for calendar view and ICS endpoints
-- **Total E2E Tests:** 64 tests (28 pass without auth, 36 skip when TEST_USER_EMAIL/TEST_USER_PASSWORD not set)
+  - `e2e/garmin.spec.ts` - 7 tests for Garmin connection and token management
+  - `e2e/health.spec.ts` - 3 tests for health/observability endpoints (NEW)
+  - `e2e/history.spec.ts` - 7 tests for history page (6 authenticated + 1 unauthenticated) (NEW)
+  - `e2e/plan.spec.ts` - 7 tests for plan page (6 authenticated + 1 unauthenticated) (NEW)
+  - `e2e/decision-engine.spec.ts` - 8 tests for decision engine (4 display + 4 override) (NEW)
+  - `e2e/cycle.spec.ts` - 11 tests for cycle tracking (1 API + 4 display + 2 settings + 3 period logging + 1 calendar) (NEW)
+- **Total E2E Tests:** 100 tests (36 pass without auth, 64 skip when TEST_USER_EMAIL/TEST_USER_PASSWORD not set)
 - **Test Categories:**
   - Unauthenticated flows: Login page UI, form validation, error handling, protected route redirects
   - Authenticated flows: Dashboard display, settings form, calendar navigation (requires test credentials)
@@ -1237,9 +1243,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ---
 
-### 3. Decision Engine Tests (`e2e/decision-engine.spec.ts`)
+### 3. Decision Engine Tests (`e2e/decision-engine.spec.ts`) ✅ COMPLETE
 
-**New file needed** - Tests the full decision priority chain through the UI
+**File created** - Tests the full decision priority chain through the UI (8 tests)
 
 | Test Name | Description | Spec Reference |
 |-----------|-------------|----------------|
@@ -1255,9 +1261,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ---
 
-### 4. Cycle Tracking Tests (`e2e/cycle.spec.ts`)
+### 4. Cycle Tracking Tests (`e2e/cycle.spec.ts`) ✅ COMPLETE
 
-**New file needed** - Tests cycle calculation and phase transitions
+**File created** - Tests cycle calculation and phase transitions (11 tests)
 
 | Test Name | Description | Spec Reference |
 |-----------|-------------|----------------|
@@ -1362,9 +1368,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ---
 
-### 9. History Tests (`e2e/history.spec.ts`)
+### 9. History Tests (`e2e/history.spec.ts`) ✅ COMPLETE
 
-**New file needed** - Tests historical data viewing
+**File created** - Tests historical data viewing (7 tests)
 
 | Test Name | Description | Spec Reference |
 |-----------|-------------|----------------|
@@ -1389,9 +1395,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ---
 
-### 11. Health & Observability Tests (`e2e/health.spec.ts`)
+### 11. Health & Observability Tests (`e2e/health.spec.ts`) ✅ COMPLETE
 
-**New file needed** - Tests monitoring endpoints
+**File created** - Tests monitoring endpoints (3 tests)
 
 | Test Name | Description | Spec Reference |
 |-----------|-------------|----------------|
@@ -1401,9 +1407,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ---
 
-### 12. Exercise Plan Tests (`e2e/plan.spec.ts`)
+### 12. Exercise Plan Tests (`e2e/plan.spec.ts`) ✅ COMPLETE
 
-**New file needed** - Tests the plan/reference page
+**File created** - Tests the plan/reference page (7 tests)
 
 | Test Name | Description | Spec Reference |
 |-----------|-------------|----------------|
@@ -1440,15 +1446,17 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 
 ### E2E Test Summary
 
-#### New Test Files Needed
-1. `e2e/decision-engine.spec.ts` - 9 tests
-2. `e2e/cycle.spec.ts` - 11 tests
-3. `e2e/history.spec.ts` - 6 tests
-4. `e2e/notifications.spec.ts` - 3 tests
-5. `e2e/health.spec.ts` - 3 tests
-6. `e2e/plan.spec.ts` - 4 tests
-7. `e2e/dark-mode.spec.ts` - 2 tests
-8. `e2e/mobile.spec.ts` - 4 tests
+#### New Test Files Created ✅
+1. ✅ `e2e/decision-engine.spec.ts` - 8 tests (COMPLETE)
+2. ✅ `e2e/cycle.spec.ts` - 11 tests (COMPLETE)
+3. ✅ `e2e/history.spec.ts` - 7 tests (COMPLETE)
+4. ✅ `e2e/health.spec.ts` - 3 tests (COMPLETE)
+5. ✅ `e2e/plan.spec.ts` - 7 tests (COMPLETE)
+
+#### Additional Test Files Planned
+6. `e2e/notifications.spec.ts` - 3 tests (not yet needed)
+7. `e2e/dark-mode.spec.ts` - 2 tests (not yet needed)
+8. `e2e/mobile.spec.ts` - 4 tests (not yet needed)
 
 #### Existing Files to Extend
 1. `e2e/auth.spec.ts` - +6 tests
@@ -1459,7 +1467,7 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 6. `e2e/garmin.spec.ts` - +9 tests
 
 #### Total Test Count
-- **Current E2E tests**: 64 tests
+- **Current E2E tests**: 100 tests (UPDATED: 36 new tests added across 5 new files)
 - **New tests needed**: ~116 tests
 - **Across 15 test files** (7 existing + 8 new)
 
@@ -1500,3 +1508,4 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 15. **Dark Mode:** COMPLETE - Auto-detects system preference via prefers-color-scheme media query (P4.3)
 16. **Component Tests:** P3.11 COMPLETE - All 5 dashboard and calendar components now have comprehensive unit tests (90 tests total)
 17. **Gap Analysis (2026-01-12):** Verified 977 tests across 50 files + 64 E2E tests across 6 files. All API routes (21), pages (8), components, and lib files (12) have tests. P0-P5 complete. Project is feature complete.
+18. **E2E Test Expansion (2026-01-13):** Added 36 new E2E tests across 5 new files (health, history, plan, decision-engine, cycle). Total E2E coverage now 100 tests across 12 files.