stagehand-python@4.4.0a0.dev1673: fix : variable substitution in act() ( 3383)

Browserbase Stagehand releases published stagehand-python@4.4.0a0.dev1673: fix : variable substitution in act() ( 3383). This automated release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: why act does not need to substitute variables on self-heal for dragAndDrop() the only args dragAndDrop() needs are selectors what changed gated var substitution on method type test plan added tests to ensure variables do not get substituted on dragAndDrop() Summary by cubic Fixes variable substitution in act() so drag-and-drop arguments keep their literal selector values instead of being treated as text templates. Skips substituteVariablesInArguments for dragAndDrop actions while preserving it for other methods. Adds tests covering inferred, supplied, and self-heal drag actions with variables present. Written for commit 32e7744 . Summary will update on new commits.

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