✨ feat(pagination): add pagination support for products, pages, and c…

[shurco]

…arts

Changes made in this commit:

• Modified: internal/handlers/private/cart.go, internal/handlers/private/page.go, internal/handlers/private/product.go
• Modified: internal/handlers/public/cart.go, internal/handlers/public/product.go, internal/handlers/public/setting.go
• Modified: internal/queries/cart.go, internal/queries/pages.go, internal/queries/products.go, internal/queries/queries_test.go
• Modified: web/admin/src/routes/carts/+page.svelte, web/admin/src/routes/pages/+page.svelte, web/admin/src/routes/products/+page.svelte
• Modified: web/admin/src/lib/components/index.ts, web/admin/src/lib/components/Badge.svelte, web/admin/src/lib/components/page/Seo.svelte
• Modified: web/site/src/routes/+page.svelte
• Added: web/admin/src/lib/components/Pagination.svelte, web/site/src/lib/components/Pagination.svelte

Key changes:

• Add pagination support in backend queries (limit, offset parameters)
• Update handlers to parse page and limit query parameters (default: page=1, limit=20, max=100)
• Create reusable Pagination component for admin and site
• Add pagination UI to admin pages (products, pages, carts)
• Add pagination UI to site products page
• Fix Svelte 5 runes mode warnings (use $state() for reactive variables, replace svelte:component)
• Add cursor-pointer style to pagination buttons
• Maintain backward compatibility (limit=0 returns all records)

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.
Explain the details for making this change. What existing problem does the pull request solve?

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• If new dependencies exist, I have checked that they are really necessary and agreed with the maintainers/community (we want to have as few dependencies as possible)
• I tried to make my code as fast as possible with as few allocations as possible
• For new code I have written benchmarks so that they can be analyzed and improved

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