phsl / new-api

Introduce two new visualizations to the “Model Data Analysis” panel:

1. Model Consumption Trend (line chart)
   • Added `spec_model_line` state and legend support.
   • Calculates per-model counts over time and updates via `updateChartData`.
2. Model Call Ranking (bar chart)
   • Added `spec_rank_bar` state with `seriesField` and legend enabled.
   • Ranks models by total call count.

Additional changes:
• Extended tab navigation with two new `TabPane`s and adjusted chart rendering logic.
• Swapped icons/texts to match new chart purposes.
• Reused existing color mapping to ensure consistent palette.

No breaking changes; UI now offers richer insights into model usage patterns.