Add UTM attribution to outbound wavespeed.ai links

Correct API-key handling notes in README

Rebuild on shared BYOK template: user-supplied API key, v3 API, Python 3.11

Fix startup failures: pin Python 3.11, unpin pydantic, vendor example media

Fix import-time crash: lazy safety classifier, no hard raise on missing API key

fix

Update app.py

Create app.py

Delete app.py

Update requirements.txt

Update app.py

initial commit

Duplicate from gradio-templates/text-to-image-gradio-template