Media files missing from Coding anki deck

If you run **Tools -> Check Media** in Anki, the following files are reported as missing:

```
dijkstra.gif
selection_sort.gif
eratosthenes.gif
quicksort_wikipedia.gif
merge_sort.gif
insertion_sort.gif
```

Start by opening the Coding Anki deck and running Tools -> Check Media to reproduce the report. Investigate how the deck stores or packages its media, then verify that dijkstra.gif, selection_sort.gif, eratosthenes.gif, quicksort_wikipedia.gif, merge_sort.gif, and insertion_sort.gif are no longer reported missing.

Written by the indexing model from the issue text.