Bugs from Pycon26

### Describe the bug

Great workshop!!! Very fun and interactive.

Some bugs my table noticed:
- Had to build a bunch of packages for Arch linux, and maybe one was missing from toml? I'm not too sure. Hopefully he emails you about this with details.

- SSL error encounted when running as desktop app.

Solved by commenting out `import ssh` and `verify=ssl.create_default_context(),`

- Guys with corporate, locked down laptops had trouble at the build step

- Darkmode on windows caused the text to appear as black on black.

- I didn't follow the prep instructions and download ahead of time :( but that's on me

Thanks so much for the great workshop!

### How to reproduce the bug

Use arch linux, or corporate windows, or mac m2 arm64…. haha we had a diverse table I guess.

### Minimum example code

```shell

```

### Screenshots

_No response_

### Environment details

- Operating system and version:
- Python version:
- Software versions:
- Briefcase:
- Toga:
- ...

### Logs

```

```

### Additional context

_No response_

The report names no files, tests, or entry points. Start by separating the Arch package, desktop SSL, locked-down build, and Windows dark-mode reports, then collect the OS, Python, Briefcase, and Toga versions plus logs for each. Done requires each report to be separately reproducible or documented as unreproducible.

Written by the indexing model from the issue text.