Analytics layout: larger charts with natural-width cap, one-line totals

- Charts grow to a larger intrinsic size (1052x174) and never upscale
  past it; centered with equal side margins above the cap, full width
  below, svg always within page bounds; overflow visible so wider fonts
  don't clip at the viewBox edge
- Totals row aligns its left edge with the charts and shrinks (gap first,
  then font) via container units to always stay on one line

frontend/src/analytics/chart.js

@@ -9,8 +9,8 @@
 import { DAY, HOUR, MIN5, WEEK, mondayUTC } from './time.js'
 import { formatCount } from './format.js'
 
-export const CHART_W = 720
-export const CHART_H = 126
+export const CHART_W = 1000
+export const CHART_H = 150
 export const PAD_TOP = 14 // room above the highest point
 export const MARGIN_L = 40 // y tick labels + vertical axis label
 export const MARGIN_B = 24 // x tick labels