v0.12.8

Summary

• Reduce Gemini screenshot/media token cost by defaulting ChatGoogle media inputs to low resolution.
• Honor Agent(..., vision_detail_level=...) by forwarding it to providers with media-resolution support.
• Honor images_per_step=0 by omitting screenshot image parts from LLM prompts while keeping DOM state.
• Add modality token details to usage logs and ChatInvokeUsage.model_dump() for image/text cost attribution.

Verification

• .venv/bin/python -m unittest discover -s tests -q
• .venv/bin/python -m compileall -q python/browser_use_rs tests bench
• cargo check -p bu-py
• cargo test -p bu-cdp -p bu-dom -p bu-browser
• BROWSER_USE_RS_DISABLE_DOTENV=1 .venv/bin/python bench/release_preflight.py
• git diff --check