Migrate SavedSearchesModal dialogs to KDS — fixes #<issue-5470>

[JanaKocakova]

Summary

This PR migrates the two dialogs in SavedSearchesModal from Vuetify components to KDS:

• Replaced MessageDialog with KModal for delete confirmation dialog
• Replaced ActionLink with KRouterLink for saved search links
• Replaced VList, VListTile* components with semantic HTML (<ul>, <li>, <div>) and custom SCSS
• Replaced VDivider with CSS border-bottom styling
• Added notranslate class to user-generated search names to prevent Chrome auto-translation
• No logic changed - all methods, computed properties, and data remain unchanged.

Manual verification performed:

• Verified saved searches list displays correctly with proper spacing and styling
• Clicked saved search link - navigates to results and closes modal
• Tested delete flow - delete works
• Verified empty state message displays when no saved searches exist
• Tested keyboard navigation on links and buttons
• I provide screenshots before and after for Saved searches dialog, empty saved searches dialog and Delete search dialog. Firstly is "before screenshot" and later is "after screenshot":

References

Parent issue - #5060)

Reviewer guidance

• I didnt add unit tests as this change is a UI-only migration with no logic changes, and this view previously had no test coverage. I considered adding unit tests but I think that manual testing while doing screenshots is the best way to capture possible user interactions.
• I wasnt sure how should i define color for text, but I tried to follow existing examples using for example "color: var(--v-grey-base);"
• You can see difference in before and after screenshot for Delete search dialog. Originally behind this dialog was no backdrop/scrim even though there was backdrop behind Saved searches dialog. I left backdrop there as it looks like default KModal behavior.

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