The browser tools work on files. The desktop app works on cars — connecting over an ENET cable or a J2534 interface to read, diagnose and code live modules.
A web page cannot open a raw network socket, so ENET and DoIP communication is simply not possible from a browser — no amount of engineering changes that. Live vehicle work needs a native application, so that is what it gets.
The first version will be read-only on purpose: scan and identify modules, read and decode fault codes, read coding and vehicle order, read ISN and gearbox data. Read-only features cannot damage a control unit, which makes them the right place to start.
Every write operation will take a full automatic backup first, check supply voltage before it starts, and require explicit confirmation. Until then, the browser tools cover the file side of the job.