SPA: dashboard rework — capture-status tiles, 14-day sparkline, stock as a stacked bar #654

Part of the SPA look-and-feel pass (design review 2026-09-02). Sibling slices: numeric typesetting, elevation hierarchy, all-caps labels, table layout, empty states, visual identity. Do this one after the typesetting / elevation / caps slices so it inherits them.

Problem

The Dashboard (web/src/routes/Dashboard.tsx) is the landing screen and the weakest one — it is deliberately not among the README screenshots (#549). It is the default treatment: three identical stat cards (big number, small caps label) above three identical panels, each a small table. It answers "how many" but not the question a farm asks at 6 am: which houses have no entry yet, and is lay rate normal?

Proposal

┌ Today, Tue 2 Sep ─────────────────────────────────────────────┐
│ House A   327 ●    House B   — no entry    House C   298 ●    │  one tile per active flock;
│ ▁▂▃▅▆▅▆▇▆▇▇█▇▇  eggs, last 14 days      hen-day 101% (▲1.2)   │  "no entry" is the alarm state
├ Stock ─────────────────────────── ┬ Recent sales ─────────────┤
│ ████████▓▓▓▓▒▒▒░  4,956 available │ SO-66C1  Customer 3 16.20 │  stacked bar by grade,
│ Large 2,719 · Medium 1,480 · …    │ …                         │  reuses .meter
└───────────────────────────────────┴───────────────────────────┘

• Capture status row replaces the Today panel table: one tile per active flock — name, today's eggs, status badge; a flock with no entry is visually the loudest thing on the screen and links straight to Daily entry for that flock.
• 14-day eggs sparkline (inline SVG, no chart library) with the 7-day hen-day % and its delta vs the previous 7 days. One additional listDailyEntries range call; the hen-day maths already exists server-side for Reports — reuse the report endpoint if it is cheaper than recomputing client-side.
• Stock as one stacked bar by grade (the .meter component already exists) with the per-grade figures as a caption, instead of a three-column table.
• Recent sales: keep, as a compact list.
• Stat cards: drop the row; the figures move into the tiles and the sparkline caption.
• Panels degrade independently, as today.

Acceptance

• A flock with no entry today is identifiable within one glance and one click from the dashboard.
• Sparkline + hen-day delta render from real data; — (never a zero) when the fetch fails, matching the existing degrade-alone rule.
• Stock bar sums to the available total and matches the Stock screen.
• ReadOnly / Denied roles still see no sales panel (Security: ReadOnly role can read customer PII + sales financials via ungated /customers and /sales reads #127).
• Light + night + four farm palettes; reduced motion respected (no animated bars).
• Vitest tests for tile status, sparkline data mapping and stock bar proportions (frontend tests in the same PR).
• Help page + specs/product/GLOSSARY.md updated if "hen-day %" or "capture status" appear as new dashboard concepts (owner directive 2026-07-17).
• i18n en / es / tl inline.
• Consider adding the dashboard to tools/simulation/ui/specs-screenshots/ once it is worth showing (docs: generated screenshots of the running SPA in the README #549 excluded it on purpose).

Siblings: #650 #651 #652 #653 #655 #656 #657