update slides styling and content refinements

- fix course number 223015c → 223015b in termin 1
- adjust language: "fuck" → "heck" in example
- add black backgrounds for image-only slides
- add bg fit to fullscreen images
- update digital-landscape.png
- add frontmatter to termin 2-4 slides
This commit is contained in:
2025-12-18 01:22:37 +01:00
parent 3a0cb91391
commit 75c8476043
6 changed files with 64 additions and 19 deletions
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