feat: fixed the collections page sorting logic and add URL persistence

[Qu1et-x]

Summary

This PR improves the collection page's user experience by fixing a sorting conflict and adding state persistence to the URL.

Changes

• Fixed Sorting Logic: Removed a conflicting inline .sort() in the template that was overriding the computed property.
• Added URL Persistence: Integrated useNativeRoute and useNativeRouter to synchronize the sortBy state with the URL query parameter ?s=.
• UI Consistency: Replaced the previous search row with a DropdownSelect component, matching the design language used in the search page (index.vue).
• Improved Layout: Adjusted margins (mb-3) and input heights to create a more compact and modern look.
• Empty State: Added a visual feedback section for when no collections match the user's search query.

Technical Details

• Used a watch effect on sortBy to trigger router.replace for seamless URL updates without adding to browser history.
• Ensured orderedCollections handles both filtering and sorting in a single reactive computed property.

Verification

• Verified that sorting works as expected on both desktop and mobile.
• Confirmed that refreshing the page restores the previously selected sorting option.