fix: resolve type errors and migrate pnpm settings to pnpm-workspace.yaml

- Move pnpm.onlyBuiltDependencies/overrides from package.json to pnpm-workspace.yaml (clears pnpm WARN)
- Allow useServerAction run() to accept actions returning void
- Make adminAction/authAction input optional so no-schema actions can be called without args
- Return ActionResult from updateBcPage
- Fix categoryPageMap value type (number | undefined)
- Declare DbService.queryCount field
- Use definite assignment for release in withFurniDataLock
- Narrow pair type in theme-contrast test

src/app/api/admin/import/furni/route.ts

@@ -625,7 +625,7 @@ export const PUT = withAdmin(
 		}
 
 		// 5. Pre-load category page map (captionSave → pageId) to avoid N+1 queries
-		const categoryPageMap = new Map<string, number>();
+		const categoryPageMap = new Map<string, number | undefined>();
 		for (const sp of subPages) {
 			if (sp.captionSave) categoryPageMap.set(sp.captionSave, sp.id);
 		}