fix: add missing PressKeyAction dispatch in browser tool

[cagataycali]

Description

This PR fixes the missing dispatch case for PressKeyAction in the browser tool, which caused all press_key actions to fail with "Unknown action type".

Related Issues

• Fixes Browser tool: PressKeyAction not handled in dispatch logic #350

Root Cause

The PressKeyAction model is defined in models.py and the press_key() method is fully implemented in browser.py (lines 501-521), but the dispatch logic in the browser() method was missing the handler case.

Before (broken):

elif isinstance(action, TypeAction):
    return self.type(action)
elif isinstance(action, GetTextAction):  # PressKeyAction case was MISSING
    return self.get_text(action)

After (fixed):

elif isinstance(action, TypeAction):
    return self.type(action)
elif isinstance(action, PressKeyAction):  # Added missing handler
    return self.press_key(action)
elif isinstance(action, GetTextAction):
    return self.get_text(action)

Documentation PR

No documentation changes required - this is a bug fix for existing functionality.

Type of Change

Bug fix (non-breaking change which fixes an issue)

Testing

• I ran hatch run prepare
• Verified the dispatch logic now correctly routes PressKeyAction to press_key() method
• The press_key() method implementation was already working correctly

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature
• My changes generate no new warnings
• Any dependent changes have been merged and published

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PR created by strands-coder autonomous agent 🦆