refactor(catalog): separate Studio data hooks and presentation

src/components/admin/studio/README.md

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+# Catalog Studio code map
+
+`studio-client.tsx` composes the workspace, selection and actions. Keep reusable data handling outside its render tree.
+
+## Client responsibilities
+
+- `studio-filters.ts`: pure filtering and sorting of the loaded furniture list; never mutates the input array.
+- `use-studio-translations.ts`: language selection, persisted defaults and translation requests.
+- `use-furniture-jobs.ts`: queue submission, retry identity, polling and completion notifications.
+- `furniture-jobs.tsx`: job history and retry controls.
+- `use-furniture-inspection.ts`: cancellable inspection requests and explicit rechecks.
+- `furniture-inspector.tsx`: local component status, source comparison and repair controls.
+- `import-review.tsx`: import review and attachment confirmation.
+- `studio-types.ts`: shared client data types.
+
+## Server responsibilities
+
+- `src/lib/services/furniture-inspection.ts`: reads SQL, catalog offers, furnidata and asset presence.
+- `src/lib/furni/studio-inspection.ts`: shared validation, comparison and completeness classification.
+- `src/lib/services/furniture-repair.ts`: preflight, preservation options and post-repair verification.
+- `src/lib/services/furni-job-worker.ts`: durable queued work and per-item results.
+
+Keep client modules free of filesystem/database imports. Background refreshes must not reset open editors or unsaved input. Completion status must come from verification, not optimistic UI flags.