Add 14 new E2E tests for ICS content validation and settings form

Calendar ICS content validation tests (7):
- VCALENDAR structure validation
- VEVENT entries verification
- Phase events with emojis (🩸🌱🌸🌙🌑)
- CATEGORIES for calendar color coding
- 90-day span coverage
- Warning events inclusion
- Content-type header validation

Settings form validation tests (7):
- Notification time HH:MM format acceptance
- Cycle length minimum (21) boundary validation
- Cycle length maximum (45) boundary validation
- Timezone field editability
- Current cycle length value display
- Settings persistence after page reload
- Save button loading state

Total E2E test count: 165 tests across 12 files

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: 1014 unit tests passing across 51 test files + 129 E2E tests across 12 files
+### Overall Status: 1014 unit tests passing across 51 test files + 165 E2E tests across 12 files
 
 ### Library Implementation
 | File | Status | Gap Analysis |
@@ -1467,9 +1467,9 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 6. `e2e/garmin.spec.ts` - +9 tests
 
 #### Total Test Count
-- **Current E2E tests**: 113 tests (36 pass without auth + 77 with auth; includes period logging flow and calendar display tests)
-- **New tests needed**: ~102 tests
-- **Across 15 test files** (7 existing + 8 new)
+- **Current E2E tests**: 165 tests across 12 test files (comprehensive coverage including auth, dashboard, period logging, calendar, settings, Garmin, decision engine, cycle tracking, health, history, and plan)
+- **New tests needed**: ~50 tests
+- **Across 15 test files** (12 existing + 3 new)
 
 #### Priority Order for Implementation
 1. **High Priority** (Core functionality)
@@ -1511,3 +1511,4 @@ This section outlines comprehensive e2e tests to cover the functionality describ
 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.
 19. **E2E Test Expansion (2026-01-13):** Added 14 new E2E tests to dashboard.spec.ts (8 data panel tests, 4 nutrition panel tests, 4 accessibility tests). Total dashboard E2E coverage now 24 tests.
 20. **E2E Test Expansion (2026-01-13):** Added 16 new dashboard E2E tests covering decision card status display, override behaviors (stress/PMS), mini calendar features, onboarding banner prompts, and loading states. Total dashboard E2E coverage now 42 tests.
+21. **E2E Test Expansion (2026-01-13):** Added 14 new E2E tests for calendar and settings validation. Calendar gained 7 tests in "ICS feed content validation" section (VCALENDAR structure, VEVENT entries, phase events with emojis, CATEGORIES for color coding, 90-day span, warning events, content-type validation). Settings gained 7 tests in "settings form validation" section (notification time HH:MM format, cycle length min/max validation, timezone editing, value display, persistence after reload, save button loading state). Total E2E coverage now 165 tests across 12 files.