I would just give it a few days and if you don't hear from her, say "Don't think too hard now"

What happened in the background could be anything... she was down to meet at your place but a bar is high effort? She's underwhelmed by your venue choice or the distance? She's not really available but was curious about your plans?

You let her "I might be" go past unchecked. "Might be?" would have nailed down the time and progressed your soft close, or uncovered the issue.

p.s. the best use of "feeling spontaneous" is "feeling spontaneous tonight" ideally after she's mentioned she's got nothing on tonight. "Feeling spontaneous tomorrow" is just a fancy way of throwing a specific time at her, which is risky.

You had very good text game, but you missed a step at the end. When you said " Odgen and Grand.. It's a edgy but calm biker bar" I would have just said that and let her say, "Ya, I know that spot." and then hard close, "Perfect, we should get together sometime soon." Then, you would go for the schedule part. The only thing missing was the hard close, because you never really ever Hard closed, you just brought up the idea. That's why she was a little hesitant. I would recover and build on what you said. "Hopefully it involves splitting wine on my romantic balcony"