Yeah reconnecting from different terminals is a pretty tricky problem to solve (and in fact can't be solved in general because of potential skew between the terminfo db on the client machine and the remote machine). The big problem is that once you launch a shell, there is no great way to change environment variables from outside that shell, so you can't change the value of TERM for a running shell. I have thought about trying some LD_PRELOAD tricks to try to be able to call setenv() from within the shell process itself, but this always struck me as something that would require a pretty big hack.
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