fix(exploreData): trigger refresh immediately on visibility change

- `handleVisibility` only scheduled intervals but didn't trigger an immediate refresh when returning to the tab.
- This caused `tests/unit/services/exploreDataService.test.mjs` to fail (assertion `0 !== 1`).
- Added explicit calls to `refreshWatchHistoryTagCounts` and `refreshTagIdf` when `document.hidden` becomes false.

Co-authored-by: PR0M3TH3AN <[email protected]>

package.json

@@ -64,7 +64,7 @@
     "prettier": "^3.8.1",
     "prettier-plugin-tailwindcss": "^0.6.5",
     "serve": "^14.2.5",
-    "stylelint": "^16.26.1",
+    "stylelint": "^16.12.0",
     "stylelint-config-standard": "^36.0.1",
     "vitest": "^4.0.18"
   },