Add copy-only, color swatches, DB speed pragmas, and living docs

- Copy only (right-click -> Copy): write to clipboard without
  auto-pasting or hiding the window
- Color swatches: hex/rgb/hsl entries show a preview chip
- SQLite WAL + synchronous=NORMAL so the UI can read while the
  clipboard poller writes
- Memoize list rows (React.memo) so selection/focus changes don't
  re-render every row's preview
- Add docs/GUIDE.md (living install + usage doc), docs/SHARING.md,
  docs/TESTING.md, docs/LAUNCH-AT-LOGIN.md, docs/PRODUCT.md,
  CHANGELOG.md, ROADMAP.md
- Add homelab Gitea Actions CI (.gitea/workflows/ci.yml) + gitleaks
  allowlist
- Bump version to 0.2.0

package.json

@@ -1,7 +1,7 @@
 {
   "name": "macopy",
   "private": true,
-  "version": "0.1.0",
+  "version": "0.2.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
@@ -10,6 +10,9 @@
     "tauri": "tauri",
     "test": "vitest run",
     "test:watch": "vitest",
+    "test:ui": "vitest --ui --open --watch",
+    "test:headed": "vitest --config vitest.browser.config.ts --watch=false --browser.headless=false",
+    "test:visual": "node scripts/visual-walkthrough.mjs",
     "test:rust": "cd src-tauri && cargo test",
     "test:all": "npm run test && npm run test:rust",
     "lint": "tsc --noEmit",
@@ -32,7 +35,10 @@
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.1",
+    "@vitest/browser-playwright": "^4.1.10",
+    "@vitest/ui": "^4.1.10",
     "jsdom": "^29.1.1",
+    "playwright": "^1.61.1",
     "tailwindcss": "^4",
     "typescript": "^5.5.3",
     "vite": "^6",