From 4 hours of email dread to 30 mins: Scratching my own itch with an AI Action Dashboard. Is this a viable?

Hey everyone,
I run my own business and for the longest time, my biggest bottleneck wasn't my actual work—it was my inbox.
I was easily wasting 3 to 4 hours every single day just dealing with emails. The frustrating part is that I don't even get crazy high volume. It’s just the mental friction of opening an email, seeing a client ask for a quote or an invoice, and then having to switch gears. I'd have to open my billing tools, calculate the numbers, write out a polite "corporate" response, attach everything, and send it. I’d get lazy, procrastinate on complex threads, and sometimes completely forget to reply to important leads for days.
Standard email apps just feel like a passive pile of messages. They don't help you actually do the work.
So out of pure frustration, I built a private tool to fix it for my own setup.
Instead of a standard inbox, it’s a dashboard that treats emails like a pipeline of actions. When an email comes in, an AI layer figures out what the client actually wants (like an invoice request, a quote, or a follow-up) and sets up an action panel right next to the email thread.
If a client asks to be billed for a project, the app pulls the details into interactive text boxes right on my screen (Amount, Scope of Work, Due Date). If the AI guesses a number wrong, I don't rewrite the email. I just change the number in the box, hit a keyboard shortcut, and the system automatically generates the final invoice data and drafts a polished response. I just glance, verify, and hit send.
It took my email time down from a miserable 4 hours of dread to about 30 minutes of just quick clicking and verifying.
I'm trying to decide if this is worth turning into an actual SaaS or if it's just a hyper-specific tool for myself. I'd love to get some honest feedback from other founders:
Does this inbox paralysis resonate with anyone else? Do you actually drop leads or stall on invoicing because you hate the back-and-forth admin work?
Also, if this was a real product, would you actually trust a third-party app with secure access to your email and billing tools to save that kind of time, or is that a complete dealbreaker for you?
Let me know what you think, don't hold back.