PLAYWRIGHT_HEADLESS=false has no effect, browser always run headless

[tsukayaa]

Description of the bug:

Bug Description

Setting PLAYWRIGHT_HEADLESS=false in .env does not show the browser window. The browser always runs headless regardless of the env var value

Root Cause

In computers/playwright/playwright.py line 114:

headless=bool(os.environ.get("PLAYWRIGHT_HEADLESS", False)),

os.environ.get() always returns a string never a Python boolean
bool("false") evaluates to True in Python because any non-empty string is truthy

So PLAYWRIGHT_HEADLESS=false -> bool("false") -> True -> always headless

Actual vs expected behavior:

1. Set PLAYWRIGHT_HEADLESS=false in .env
2. Run python main.py --query "go to google.com"
3. Expected: browser window appears
4. Actual: browser runs headless and no window shown

Counterintuitively, removing PLAYWRIGHT_HEADLESS from .env entirely shows the browser, because the default False (boolean) is never passed through bool() as a string.

Any other information you'd like to share?

Proposed Fix

Before

headless=bool(os.environ.get("PLAYWRIGHT_HEADLESS", False)),

After

headless=os.environ.get("PLAYWRIGHT_HEADLESS", "false").lower() == "true",

This ensures only the string "true" (case-insensitive) enables headless mode and treating all other values as false.

I'd like to submit a PR for this fix if the approach looks good