Fix: Verbleibende any-Typen in customers route korrigiert

app/api/customers/route.ts

@@ -58,21 +58,22 @@ export async function POST(request: NextRequest) {
       })
 
       return NextResponse.json(customer, { status: 201 })
-    } catch (dbError: any) {
+    } catch (dbError: unknown) {
       console.error("Database error creating customer:", dbError)
-      const errorMessage = dbError?.message || "Database error occurred"
+      const errorMessage = dbError instanceof Error ? dbError.message : "Database error occurred"
+      const errorCode = (dbError as { code?: string })?.code
       return NextResponse.json(
         { 
           error: errorMessage,
-          code: dbError?.code,
-          details: process.env.NODE_ENV === 'development' ? dbError?.stack : undefined
+          code: errorCode,
+          details: process.env.NODE_ENV === 'development' && dbError instanceof Error ? dbError.stack : undefined
         }, 
         { status: 500 }
       )
     }
-  } catch (error: any) {
+  } catch (error: unknown) {
     console.error("Error in POST /api/customers:", error)
-    const errorMessage = error?.message || error?.toString() || "Failed to process request"
+    const errorMessage = error instanceof Error ? error.message : String(error)
     return NextResponse.json(
       { 
         error: errorMessage,