chore(conductor): Add new track 'Testing Infrastructure'

conductor/tracks/testing_infrastructure_20260219/plan.md

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+# Implementation Plan - Testing Infrastructure
+
+## Phase 1: Environment & Mock Server
+- [ ] Task: Scaffold Docker environment
+    - [ ] Create test_data/ directory.
+    - [ ] Create docker-compose.test.yml with SilverBullet and an Nginx container serving test_data/.
+- [ ] Task: Integration Test Scaffolding
+    - [ ] Create tests/integration_test.ts that uses the actual ts-ics parser on files in test_data/.
+- [ ] Task: Conductor - User Manual Verification 'Environment & Mock Server' (Protocol in workflow.md)
+
+## Phase 2: Playwright E2E Setup
+- [ ] Task: Initialize Playwright
+    - [ ] Setup Playwright with necessary configurations for Docker (headless, CI mode).
+- [ ] Task: Implement sync smoke test
+    - [ ] Create tests/e2e/sync.spec.ts.
+    - [ ] Automate login, plug installation (icalendar.plug.js), and triggering the "iCalendar: Sync" command.
+    - [ ] Implement console listener to fail on Error or TypeError.
+- [ ] Task: Conductor - User Manual Verification 'Playwright E2E Setup' (Protocol in workflow.md)
+
+## Phase 3: Validation & Bug Fix
+- [ ] Task: Verify Infrastructure against current bug
+    - [ ] Add the problematic .ics to test_data/.
+    - [ ] Confirm that E2E and Integration tests fail with Unknown RRULE property 'WORKWEEKSTART'.
+- [ ] Task: Implement Fix for WORKWEEKSTART
+    - [ ] Update RRULE_KEY_MAP in icalendar.ts.
+    - [ ] Run tests again to confirm they pass.
+- [ ] Task: Conductor - User Manual Verification 'Validation & Bug Fix' (Protocol in workflow.md)