v1.2.0

The dashboard no longer freezes on open, and a filter change no longer re-scans the whole history three times.

Changed

• Staged, observable load: settings → storage read → parse → normalize → aggregate → charts, yielding between stages, behind a full-screen progress overlay. Countable stages show a real n/N; nothing fakes a percentage. Filter/table/chart interactions are gated until the first render lands.
• One merge per open: opening the dashboard no longer pre-builds and writes the merged snapshot (handleOpenDashboard stopped calling sendDashboardData), so the pipeline runs once instead of twice. sendDashboardData now only refreshes cachedMeta; the full cachedData snapshot is no longer written (the legacy key is kept, never deleted).
• Charts update in place (chart.update("none")) instead of destroy/recreate, and the yearly heatmap reuses its ~371 cells when the week layout is unchanged (measured 93% reuse), repainting only the cells whose shade moved. Chart animations on filter change are gone by design.
• One full scan per render: aggregate() now also emits the date-range-free dailyAll/hourlyAll maps the yearly heatmap consumes, and the unpriced-model set is memoized by a data version — the separate heatmap and unpriced scans are gone.
• Decorative canvas pauses during load and runs at ~30 fps steady state.
• Popup status line reads Dashboard opened (N records); the always-false cached/latest qualifier is retired.

Fixed

• Clicking the hourly view-toggle buttons before the first load no longer throws (the handler is gated behind the data-ready flag).

Added

• tools/tests/data-safety.test.mjs — record stores survive imports (union preserved, repeat import idempotent, cachedMeta/localImportMeta kept, cachedData optional).
• tools/bench/dashboard-load.mjs + smoke test — deterministic load benchmark with median-of-N and a no-op pricer control.