docs(sprint-01): add unit testing session prompt and clarify Claude's orchestrator role

- Add comprehensive UNIT_TESTING_SESSION_PROMPT.md for Sprint 01
  - Detailed testing guide for all 8 packages
  - Mock requirements and test structure
  - 80% coverage target with thresholds
  - Vitest workspace configuration guidance
  - Success criteria and validation commands

- Update ORCHESTRATION.md with clear role definition
  - Define Claude as orchestrator, NOT code executor
  - Clarify planning vs implementation separation
  - Document proper workflow for session separation
  - Prevent context mixing between phases

- Configure Vitest for monorepo testing
  - Install vitest, @vitest/ui, @vitest/coverage-v8, happy-dom
  - Create root vitest.config.ts for main app
  - Update package.json scripts (test, test:watch, test:coverage, test:ui)
  - vitest.workspace.ts already exists with proper configuration

🤖 Generated with Claude Code

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

Author: KevenWMarkham

package.json

@@ -16,9 +16,10 @@
     "lint:fix": "eslint . --fix",
     "format": "prettier --write \"src/**/*.{ts,tsx,css}\"",
     "format:check": "prettier --check \"src/**/*.{ts,tsx,css}\"",
-    "test": "jest",
-    "test:watch": "jest --watch",
-    "test:coverage": "jest --coverage",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
+    "test:ui": "vitest --ui",
     "test:e2e": "playwright test",
     "test:e2e:ui": "playwright test --ui",
     "test:e2e:headed": "playwright test --headed",
@@ -48,6 +49,10 @@
     "@ffmpeg/ffmpeg": "^0.12.15",
     "@ffmpeg/util": "^0.12.2",
     "@google/genai": "^1.34.0",
+    "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-progress": "^1.1.8",
+    "@radix-ui/react-slot": "^1.2.4",
+    "@tanstack/react-virtual": "^3.13.13",
     "@transcript-parser/ai-services": "workspace:*",
     "@transcript-parser/audio-processing": "workspace:*",
     "@transcript-parser/config": "workspace:*",
@@ -56,10 +61,6 @@
     "@transcript-parser/module-sdk": "workspace:*",
     "@transcript-parser/types": "workspace:*",
     "@transcript-parser/ui": "workspace:*",
-    "@radix-ui/react-dialog": "^1.1.15",
-    "@radix-ui/react-progress": "^1.1.8",
-    "@radix-ui/react-slot": "^1.2.4",
-    "@tanstack/react-virtual": "^3.13.13",
     "app-builder-bin": "^5.0.0-alpha.12",
     "bcrypt": "^6.0.0",
     "class-variance-authority": "^0.7.1",
@@ -95,6 +96,8 @@
     "@types/react": "^18.3.18",
     "@types/react-dom": "^18.3.5",
     "@vitejs/plugin-react": "^4.3.4",
+    "@vitest/coverage-v8": "^4.0.16",
+    "@vitest/ui": "^4.0.16",
     "autoprefixer": "^10.4.23",
     "commitizen": "^4.3.1",
     "concurrently": "^9.2.1",
@@ -109,6 +112,7 @@
     "eslint-plugin-react-hooks": "^5.0.0",
     "eslint-plugin-react-refresh": "^0.4.16",
     "globals": "^15.13.0",
+    "happy-dom": "^20.0.11",
     "husky": "^9.1.7",
     "identity-obj-proxy": "^3.0.0",
     "jest": "^30.2.0",
@@ -127,6 +131,7 @@
     "undici": "^7.16.0",
     "vite": "^6.0.5",
     "vite-plugin-pwa": "^1.2.0",
+    "vitest": "^4.0.16",
     "wait-on": "^9.0.3",
     "whatwg-fetch": "^3.6.20"
   },