Farrow v1.0.15

• New opt-in tool x_post_beta. It is off by default; turn it on under Tools as "Beta: faster X posting". It uses one browser eval per phase, does JS actions first and falls back to the TBP click only when the JS action had no effect, and inserts the text in a single step. It returns timings_ms.
• x_post is unchanged. The agent keeps using it unless you turn the beta on or ask for it.