Is the wife still under the husband's marital authority ( عصمة الزوج), and how many pronouncements of divorce remain for her after he secluded himself with her and repeatedly made divorce contingent upon certain actions, without consummating the marriage?

If you are alone with your wife in a proper seclusion that allows for intercourse, it is considered as if consummation has occurred. Suspending divorce upon a condition triggers the divorce when the condition is met, according to the majority of scholars, whether the intention was to effect the divorce or to threaten. This differs from Ibn Taymiyyah, who holds that an expiation for breaking an oath is required if the intention was not to effect the divorce. If intercourse becomes impossible due to incapacitation, then there is no violation of the oath regarding the divorce suspended upon intercourse. Your statement: "You are divorced if you do not come to me" effects the divorce if she does not come within the specified or possible time. Your statement: "Then I will think about divorce" is merely a promise and a threat, and no divorce occurs thereby.