v12: drop 30-min timeout, kill lingering heartbeat, prompt-injection defenses, seed goals.md#220

MagMueller wants to merge 1 commit into

v11-goal-passthroughbrowser-use/bux:v11-goal-passthroughfrom

v12-security-and-cleanupbrowser-use/bux:v12-security-and-cleanupCopy head branch name to clipboard