Build a financial spend dashboard

Build a Ramp-style financial spend dashboard as a single page: a left sidebar with nav items and a workspace switcher, a top row of KPI tiles (total spend, change vs last month, top category, transaction count), a bar chart of monthly spend across the last 12 months, and a recent-transactions table. Use realistic dummy data and a clean, premium fintech aesthetic. Inline CSS; vanilla JS or inline SVG for the chart — no external libraries. Return one self-contained HTML file. Output only the HTML.