feat(skills): registry card polish and persisted pagination state

[samuv]

Follow-up polish to the Skills → Registry tab on top of #2097 / #2098.

Kapture.2026-04-24.at.19.18.32.mp4

Summary

• Normalized repo label replaces the io.github.stacklok subheading on registry cards and the namespace badge on the skill detail page. GitHub URLs render as org/repo, other hosts as host/path. The namespace stays on props — only hidden from the UI. Table view is untouched.
• Pagination bar pinned to the viewport bottom so it stays anchored with 3 cards or 30. Overflowing grids still scroll as before.
• Last-page button (>|) added to the shared Pagination component, next to the existing next/first/prev controls.
• Items-per-page is remembered across sessions via a new ui.pageSize.skillsRegistry preference, wired through the same uiPreferences IPC path used for view-mode. URL ?limit= still wins over the stored value.

[Copilot]

Pull request overview

This PR adds UI polish and state persistence improvements to the Skills → Registry experience, including normalized repo labels, pagination enhancements, and a persisted “items per page” preference stored via the existing UI preferences IPC.

Changes:

• Add getDisplayRepoLabel() utility + tests, and swap registry card/detail badge UI to show a normalized repo label instead of namespace.
• Enhance shared Pagination with a “last page” control and adjust Skills registry layout so pagination stays anchored at the bottom of the registry tab panel.
• Persist Skills Registry page size across sessions via new ui.pageSize.skillsRegistry preference with preload + main-process IPC wiring and tests.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
renderer/src/routes/skills.tsx	Makes limit optional in route search parsing and falls back to default when querying.
renderer/src/features/skills/lib/get-display-repo-label.ts	New helper to normalize repository URL display strings.
renderer/src/features/skills/lib/tests/get-display-repo-label.test.ts	Unit tests for repo label normalization behavior.
renderer/src/features/skills/components/skills-page.tsx	Wires persisted page size preference into registry query/pagination and adjusts layout classes.
renderer/src/features/skills/components/skill-detail-page.tsx	Replaces namespace badge with normalized repo label in the detail header.
renderer/src/features/skills/components/card-registry-skill.tsx	Replaces card subtitle from namespace to normalized repo label.
renderer/src/features/skills/components/tests/skills-page.test.tsx	Adds tests covering persisted page size + URL precedence.
renderer/src/features/skills/components/tests/card-registry-skill.test.tsx	Updates tests to assert namespace is hidden and repo label is shown when available.
renderer/src/common/mocks/electronAPI.ts	Extends Electron API test stub with page-size preference methods.
renderer/src/common/hooks/use-page-size-preference.ts	New React Query hook to read/write persisted page size via IPC.
renderer/src/common/hooks/tests/use-page-size-preference.test.tsx	Hook tests for loading state, read, and optimistic write behavior.
renderer/src/common/components/ui/pagination.tsx	Adds a “go to last page” button.
renderer/src/common/components/ui/tests/pagination.test.tsx	Extends pagination tests to cover the new last-page control.
preload/src/api/ui-preferences.ts	Adds preload API methods for get/set page size preference.
main/src/ui-preferences.ts	Adds page-size preference keys and DB read/write helpers with validation.
main/src/ipc-handlers/ui-preferences.ts	Adds IPC handlers for get/set page size preference.

[peppescg]

🚀