feat: add comprehensive unit and integration testing infrastructure

- Backend: pytest with unit tests (auth, rbac, config) and integration tests (auth flow, docker, files)
- Frontend: vitest with unit tests (api client) and component tests (login)
- CI: Gitea Actions workflow for automated testing with coverage reports
- Documentation: TESTING.md guide with setup, usage, and best practices
- Coverage goals: 80%+ backend, 70%+ frontend

dashboard/frontend/package.json

@@ -5,12 +5,19 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "vite build"
+    "build": "vite build",
+    "test": "vitest",
+    "test:ui": "vitest --ui",
+    "test:coverage": "vitest --coverage"
   },
   "devDependencies": {
     "@sveltejs/vite-plugin-svelte": "^6.2.0",
+    "@testing-library/svelte": "^5.2.3",
+    "@vitest/coverage-v8": "^2.1.8",
+    "jsdom": "^25.0.1",
     "svelte": "^5.0.0",
     "vite": "^6.3.0",
+    "vitest": "^2.1.8",
     "tailwindcss": "^4.0.0",
     "@tailwindcss/vite": "^4.0.0"
   },