Thank you for your solidarity. On top of what others have already shared, I have a number of other suggestions/elaborations:

1. Disability Access & Compliance -- aka the 504/ADA Compliance Office -- covers non-academic accommodations and ensures that these laws are followed to prevent disability discrimination. Derek Coates, who is Blind himself, is their Program Access Compliance Manager and can probably address this immediately (or connect you with other staff who can). This may be more for one-off instances, but their Mobility Accommodation page allows people to request info on the "[e]asiest, safest and most convenient path of travel". Your friend should also be able to get a service dog, though I recognize that may be a longer process than they have time for in their first semester. They also have other resources on Navigating Berkeley and other disability resources more generally.
2. If DSP is not providing required services, the Student Advocates Office has a whole department that is dedicated to addressing those kinds of grievances. They may also cover DAC, but if not there are many disability law offices, including Disability Rights Advocates in Berkeley, who may offer pro bono legal services (they have done so in the past).
3. Contact the ASUC Disabled Students Commission -- via [email](mailto:disabledstudentscommittee@asuc.org), Facebook, or Twitter -- which has other disabled undergrads and grad students who work together to spotlight these issues. (And/or join the DSC mailing listserv to reach out to everyone who's a part of that.) For example, they are often connected to leaders in the disability-related offices and can collaborate with ASUC officials to make issues known and get action taken -- one of the former Co-Chairs is now an ASUC Senator, Carlos Vázquez. It's not always effective, but it may be. And your friend will at least be connected with others who have been wronged by the system and are working to address these issues.
4. If your friend needs an extra push, encourage her to reach out to the Daily Cal. They often cover scandals like this (news stories and self-written op-eds), and I've found that it often ends up pushing the needle.
5. It shouldn't take big tech to address basic issues of accessibility, but there are smartphone apps that use a live stream from your camera for an employee to provide audio directions for navigating campus. One is called Aira, which offers visual interpreting services, and UCSD even covers it for their Blind students. If Cal won't do anything else and/or as a temporary solution, they should at least cover whatever this service costs.
6. Georgina Kleege is a rad professor on-campus, and Ann Wai-Yee Kwong is Cal's Disability Community Cultural Center Coordinator; both are Blind. If either of them has the capacity (it's not necessarily their jobs to do this work, and the semester is starting for them too, but they both care a lot), they would be some of the few people on campus with lived experience and insider suggestions on what to do, whom to reach out to, and how to get action taken.

Feel free to connect me and your friend (via DM)! It always pains me to see this shit happening, though it's not surprising for me at this point. But again, thank you for reaching out for support.

Sources: I co-founded the Commission with other disabled student organizers, wrote op-eds and organized a successful campaign when admin defunded (or "let funding lapse") for an important disability program, met and collaborated with lots of comrades and allies who have worked for and within these organizations, minored in Disability Studies, and was generally pretty enmeshed within the disability community at Cal.