Slice 3 step 1. Four range presets per design §10 + faraday-Q8 default:
1y (today-1y..today+1y, default), 2y, all (derives bounds from loaded
events with a +30d right pad), and custom (date-pair inputs).
mount() grows currentRangePreset + customRangeFrom + customRangeTo so
the layout-time viewport is computed from the live preset, not the
constructor-time opts. resolveRange() handles the four cases; "all"
calls rangeFromEvents() over the last fetched timeline so completing
or adding a row reflows on next repaint.
URL state in ?range=1y|2y|all|custom (omit when 1y); custom adds
?from=&to=. ISO_DATE_RE guards malformed input. Custom date-pair
shows / hides based on the preset.
i18n: 7 new keys DE+EN under projects.chart.range.*.
Design ref: docs/design-project-chart-2026-05-09.md §8.2 + §10 + §14 Q8.
mAi
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