feat: add token usage metrics and click-to-zoom charts

This commit:
- Bakes total/prompt/completion tokens directly into results.csv
- Reverts dynamic JSON scraping backend logic for speed
- Adds modal overlay functionality to zoom Chart.js graphs on click

1 files changed, 4 insertions, 0 deletions

diff --git a/api/static/js/ui.js b/api/static/js/ui.js
index 8dd9586..2c402ab 100644
--- a/api/static/js/ui.js
+++ b/api/static/js/ui.js
@@ -16,6 +16,10 @@ export const ui = {
             interactiveCharts: document.getElementById('interactive-charts'),
             dataStats: document.getElementById('data-stats'),
             
+            chartModal: document.getElementById('chart-modal'),
+            closeModalBtn: document.getElementById('close-modal-btn'),
+            modalChartContainer: document.getElementById('modal-chart-container'),
+            
             tabTriggers: document.querySelectorAll('.tab-trigger'),
             tabPanels: document.querySelectorAll('.tab-panel')
         };