feat(admin): refactor UMKM edit pages to match berita pattern

MIND/PLAN/refactor-umkm-edit-pages-pattern.md

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+# Plan - Refactor UMKM Edit Pages Pattern
+
+## Problem
+The edit pages for UMKM (Data UMKM and Produk) use an older UI pattern. The user wants to align them with the newer pattern used in the Berita edit page.
+
+## Strategy
+1. Analyze the pattern in `src/app/admin/(dashboard)/desa/berita/list-berita/[id]/edit/page.tsx`.
+2. Refactor `src/app/admin/(dashboard)/ekonomi/umkm/produk/[id]/edit/page.tsx` to match the pattern.
+3. Refactor `src/app/admin/(dashboard)/ekonomi/umkm/data-umkm/[id]/edit/page.tsx` to match the pattern.
+4. Add "Batal" (Reset) functionality to both pages.
+5. Standardize UI components (Header, Paper, Dropzone, Action buttons).
+6. Verify with a production build.
+7. Follow the versioning and deployment workflow.
+
+## Progress
+- [x] Analyze Berita edit page pattern
+- [x] Refactor UMKM Produk edit page
+- [x] Refactor Data UMKM edit page
+- [ ] Run build and fix any errors
+- [ ] Update version in package.json
+- [ ] Commit and push to task branch
+- [ ] Merge to stg branch