feat: add guided onboarding tour

- install driver.js and add 9-step tour covering libraries, lenses,
  collections, search, statistics, appearance, upload, and book bucket
- first step context-aware: points to welcome card on first run, falls
  back to settings nav when libraries already exist
- tour state persisted in user.settings JSONB, survives across devices
- skip on mobile; any dismissal (skip or done) marks tour complete
- theme the tour popover with app design tokens (card, primary, radius)
- add "Take the tour again" button in Settings > Account (desktop only)

client/package.json

@@ -32,12 +32,13 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "dompurify": "^3.3.3",
+    "driver.js": "^1.4.0",
     "echarts": "^6.0.0",
     "howler": "^2.2.4",
     "lucide-vue-next": "^1.0.0",
     "pdfjs-dist": "^5.6.205",
     "pinia": "^3.0.4",
-    "reka-ui": "^2.9.5",
+    "reka-ui": "^2.9.6",
     "socket.io-client": "^4.8.3",
     "tailwind-merge": "^3.5.0",
     "tailwindcss": "^4.2.2",
@@ -53,7 +54,7 @@
     "@types/dompurify": "^3.2.0",
     "@types/jsdom": "^28.0.1",
     "@types/node": "^25.6.0",
-    "@vitejs/plugin-vue": "^6.0.5",
+    "@vitejs/plugin-vue": "^6.0.6",
     "@vitest/coverage-v8": "^4.1.4",
     "@vitest/eslint-plugin": "^1.6.15",
     "@vue/eslint-config-typescript": "^14.7.0",
@@ -61,12 +62,12 @@
     "@vue/tsconfig": "^0.9.1",
     "eslint": "^10.2.0",
     "eslint-config-prettier": "^10.1.8",
-    "eslint-plugin-oxlint": "~1.59.0",
+    "eslint-plugin-oxlint": "~1.60.0",
     "eslint-plugin-vue": "~10.8.0",
     "jiti": "^2.6.1",
     "jsdom": "^29.0.2",
     "npm-run-all2": "^8.0.4",
-    "oxlint": "~1.59.0",
+    "oxlint": "~1.60.0",
     "prettier": "3.8.2",
     "tw-animate-css": "^1.4.0",
     "typescript": "~5.9.3",