If instead there was an autonomous computer that continuously monitored the supply of coins relative to the overall demand for them and instantly deposited the newly created supply into each citizen's wallet at a proportional and fair value relative to their existing holdings then the net effect would be a zero increase in inflation since all holders increased their holdings at the same level as before the increase. However, the new supply now enables businesses to continue operating and growing at optimal levels
There is no need in an outside computer
The system can be easily self-regulated. Create a bank inside it that would be able to create money when an entrepreneur needs to expand production and comes to the bank for a loan. Set interest rate to 0, and you will get basically the same result without externally manipulating the money supply. If the borrower defaults (e.g. his goods are not in demand or whatever), the bank sells his collateral or his assets and destroys the money
I think you are missing the point

There is no need for a bank, or debt for that matter, at all in such a system. Nor is what I propose an "external manipulation", it's totally internal and governed by the actors of the system itself (everyone agrees that more/less supply is needed and who gets it).
If you introduce a bank to manage the loans and supply it then becomes centralized and the bank can refuse loans and thus manipulate the value....which is the exact opposite to what we want.