Type-check passes. Now let me verify in the browser — checking the chart-type toggle and the combo series buckets.

Verified charts tab

The layout is correct: controls on top, the visualization toggle with 5 chart types (Grouped, Stacked, Line, Stacked Area, Bar + Line), the chart, then the table. The grouped bar chart now shows distinct colors per metric. Let me click "Bar + Line" to verify the combo mode shows the Bar/Line series buckets in the table.

Tested combo mode buckets

The combo "Bar + Line" mode works: the chart shows bars for most metrics plus a line for one (visible as the blue trend line at top), and the table now has a "BAR SERIES" section header with a count badge. Let me scroll a bit more to confirm both Bar and Line section headers render.

Confirmed series sections

Everything works exactly as requested. The combo mode shows two draggable section headers — BAR SERIES (4) and LINE SERIES (1) — with metrics pre-allocated into each (Customer Acquisition Cost defaults to the line). Each metric row keeps its drag handle, and the legend confirms "Drag rows between Bar / Line series."

Here's a summary of what I built:

• Intelligent chart-type toggle on top of the chart. The available types adapt to how many metrics are enabled:

  • 1 metric: Bar, Line, Area
  • 2+ metrics: Grouped Bar, Stacked Bar, Line, Stacked Area, and Bar + Line (combo)
  • If you switch to a type that becomes invalid (e.g. dropping to 1 metric while on a multi-series type), it auto-falls back to a sensible default.
• Single combined chart for all metrics (no more one-card-per-metric), with a shared legend, tooltip, and unique color per metric.
• Combo (Bar + Line) series buckets: when that type is selected, the table groups enabled metrics under draggable Bar Series and Line Series headers with live count badges. Dragging a row onto the other header (or onto a row in it) reassigns that metric's series role, and the chart updates instantly. Disabled metrics sink below a divider as before.
• The series buckets and toggle only appear on the Charts tab — the Table tab stays a plain flat table.

You're right — the combo mode only had "grouped bar + line." Let me read the current charts component and expand the combo variants to cover all meaningful combinations.

The user wants the combo (bar+line) to come in both grouped and stacked variants, since "stacked bar + line" was missing. Let me first check how the dashboard references the combo type so I update all usages consistently.

Now I understand the full picture. The complete set of meaningful combinations for multi-metric time series is: Grouped Bar, Stacked Bar, Line, Area, Stacked Area, plus two combos — Grouped Bar + Line and Stacked Bar + Line. Let me update the chart types.

Now update the isCombo detection and the combo rendering to support stacked bars:

Now update the dashboard's isCombo check to use the new helper:

Now let me type-check and verify both combo variants in the browser: