Dashboard UX round: standardized calculator metrics, mine cart train, panel cleanup

[VijitSingh97]

What

Three coherent chunks, one visual round:

1. Calculator standardization. Every earnings tab presents its estimate in the same Day / Month / Year table: coin column in accent, a ≈ fiat column once that coin's price is known, one shared precision per triplet so the rows align. Tari gains its month/year spans (long computed, never rendered) under a "Long-run Average — not steady income" heading; XvB gains the published current-tier reward as the same table; Energy grows Revenue (est.) / Power Cost / Net columns — the gross the net starts from was previously computed but invisible. One judgment colour across the card: net green in profit, red in loss; estimates stay accent/plain.

2. Mine cart train. A pixel-art strip under the hero band on every view: the chart window split into one cart per interval, token coins marking what landed — an orange ɱ coin per share interval, a pair for a found block, a purple gem for a confirmed Tari payout, a blue X for an XvB raffle win. Tipple chute, sleeping cat, drifting clouds; coins bob. Fully static under prefers-reduced-motion, hidden while there is no history. Server side, build_payouts exposes confirmed payouts per chain as {x: ms, amount: atomic} timeline points, gated on the payout-confirmation flags — txids never ship. Purple coins light up only where Tari payout confirmation is on: real income, never a guess.

3. Panel UX round (from a 3-agent review pass): progressive disclosure on stat-heavy cards (headline stats up front, "Show all (N)" for the rest), value-ordered advanced grid with Your Stack / The Wider Pool section labels, workers table tabular numerics + row hover + offline-red scoped to the name cell, hero headline accent cue, chart active chips green→accent (green keeps meaning "healthy"), topology zone tints + marching-ants on live routes, Total Hashes (Node)/(Pool) disambiguation.

Review pass (pre-PR)

Three read-only agents swept the diff for coverage gaps, dead code, and doc drift, plus a ponytail over-engineering pass; everything found was fixed in this branch:

• dead kind/CART_KINDS/KIND_RANK machinery deleted from minecart.mjs (renderer reads per-event counts); ponytail then also killed the orphaned fill/peak/xvb-folding chain left over from the ore-pile design — carts now carry event counts and bounds, nothing else
• coin-slot collision fixed: a block's ɱ pair no longer squeezes out a same-interval Tari/XvB coin
• build_state payouts wiring now tested end-to-end (incl. txid-never-ships assertion); cartTitle plurals, single-point history, all-gap history, gross-without-cost gating, topology ants class all covered
• stale "≈-fiat rows" doc paragraph rewritten; Revenue-needs-cost_per_kwh gating stated in both docs
• fixture generator un-rotted (get_xvb_standby pin — broken on develop since Warm the backup stack's XvB donation state so a failover doesn't cold-start the split #249) and the fixture regenerated to the current contract

Verification

• make test-dashboard 1598 passed, 96.86% coverage; patch coverage 100%
• frontend 259/259; stack 1622; selftest 132; fakes 23
• lint (js/py/sh/md/yaml/docs-voice) clean — lint-proto not run locally (needs Docker; no proto changes)
• Verified visually against a scrubbed real prod capture (267 kH/s Whale-tier fleet, light+dark, all four calculator tabs, train with real share/block/win cargo)

Not in scope: Tari-block chart series (no server event exists — the payouts payload is the honest source), Luck sign-colouring (value ships as an opaque formatted string; needs a server variant field), notification tray (needs an alerts payload — proposed as its own slice).

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