style(sandbox): fix linting errors

- Remove unused normalizeOptions function
- Fix line length violations (format long lines)
- Fix import order (alphabetical)
- Format function signatures for readability

All lint checks now passing.

src/commands/sandbox-formatters.ts

@@ -40,10 +40,14 @@ export type ContainerItem = {
   lastUsedAtMs: number;
 };
 
-export function countRunning<T extends { running: boolean }>(items: T[]): number {
+export function countRunning<T extends { running: boolean }>(
+  items: T[],
+): number {
   return items.filter((item) => item.running).length;
 }
 
-export function countMismatches<T extends { imageMatch: boolean }>(items: T[]): number {
+export function countMismatches<T extends { imageMatch: boolean }>(
+  items: T[],
+): number {
   return items.filter((item) => !item.imageMatch).length;
 }