Failed to load steamui.so

Can be debugged using ldd:

find /home/para/ -name "steamui.so" # then go there
ldd steamui.so

There will probably be a bunch of libraries marked as "not found". Find them and add them to the library path.
Example:
para@debian-ulb:~/.steam/ubuntu12_32$ LD_LIBRARY_PATH=/home/para/.steam/ubuntu12_32/:/home/para/.steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/:/home/para/.steam/ubuntu12_32/steam-runtime/i386/lib/i386-linux-gnu/:/usr/lib/mesa-diverted/i386-linux-gnu/ steam

Finally, add it to your .bashrc:
export LD_LIBRARY_PATH=/home/para/.steam/ubuntu12_32/:/home/para/.steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/:/home/para/.steam/ubuntu12_32/steam-runtime/i386/lib/i386-linux-gnu/:/usr/lib/mesa-diverted/i386-linux-gnu/:$LD_LIBRARY_PATH