fix(ui): fix __splitDate function: invalid call function 'pad' for date.year

[d-sidorov]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Documentation
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

The PR fulfills these requirements:

• It's submitted to the dev branch (or v[X] branch)
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix: #xxx[,#xxx], where "xxx" is the issue number)
• It's been tested on a Cordova (iOS, Android) app
• It's been tested on an Electron app
• Any necessary documentation has been added or updated in the docs or explained in the PR's description.

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature (to avoid wasting your time, it's best to start a new feature discussion first and wait for approval before working on it)

Other information:
There is an animation bug in the calendar component. After rendering, the first call to switch between month or year shows the wrong animation - the slide always flips to the right. This can be seen in any example in the documentation for the QDate component, when v -model is defined.

QDate._.Quasar.Framework.-.Google.Chrome.2025-03-18.13-36-48.mp4

After searching, I found that in the QDate.js file in the getViewModel() function in the returned object, the dateHash field comes in the format 002025/18/03