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feat: crypto portfolio analytics (history chart, allocation, P&L, cost basis)

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Adds the analytics half of the CoinMarketCap reference: a value-over-time
chart (GET /crypto/history, forward-filled from AssetValuation like Net
Worth's own series but scoped to crypto assets), an allocation breakdown by
coin, and stat tiles for all-time profit, total invested (cost basis), and
best/worst performer.

Deliberately no "24h" range — history is only as dense as the sync cadence
(button or once/day), so a 24h chart would be one or two points, not a
smooth intraday line. Cost basis / all-time profit / best-worst performer
aren't separate endpoints: they're trivial to derive client-side from
fields already in GET /crypto/holdings, so no redundant backend logic.

Allocation card follows the dataviz skill's categorical rule: top 7 coins
by value get a fixed-order color from the app's already-validated 8-slot
ramp, an 8th+ folds into "Other" rather than generating a new hue.

82/82 backend tests passing (3 new for /crypto/history). Verified live
against the real CoinGecko API — and caught a real holding the user had
already added directly through the UI between messages, which the smoke
test correctly left untouched while cleaning up only its own test data.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01855PiW5Wd8n4aRW4n9kByY
This commit is contained in:
ZProger
2026-08-30 04:38:51 +03:00
parent e8cd536584
commit 4ea83a9cda
14 changed files with 593 additions and 19 deletions
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22
frontend/src/lib/i18n.ts
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@@ -146,6 +146,17 @@ const ru = {
"crypto.history.empty": "Пока нет ни одной сделки.",
"crypto.history.confirmDelete": "Удалить эту сделку? Количество и средняя цена будут пересчитаны.",
"crypto.history.viewButton": "Смотреть историю",
"crypto.holdingsTitle": "Активы",
"crypto.chart.show": "Показать сумму",
"crypto.chart.hide": "Скрыть сумму",
"crypto.allocation.title": "Распределение по монетам",
"crypto.allocation.other": "Другое",
"crypto.stats.allTimeProfit": "Прибыль за всё время",
"crypto.stats.costBasis": "Вложено всего",
"crypto.stats.costBasisHint": "сумма покупок по факту",
"crypto.stats.bestPerformer": "Лучший рост",
"crypto.stats.worstPerformer": "Худшее падение",
"crypto.stats.since": "с момента покупки {{name}}",
"roi.calculator.title": "Калькулятор ROI",
"roi.calculator.investmentLabel": "Сумма инвестиции",
@@ -594,6 +605,17 @@ const en: Record<keyof typeof ru, string> = {
"crypto.history.empty": "No trades yet.",
"crypto.history.confirmDelete": "Delete this trade? Quantity and average price will be recalculated.",
"crypto.history.viewButton": "View history",
"crypto.holdingsTitle": "Holdings",
"crypto.chart.show": "Show amount",
"crypto.chart.hide": "Hide amount",
"crypto.allocation.title": "Allocation by coin",
"crypto.allocation.other": "Other",
"crypto.stats.allTimeProfit": "All-time profit",
"crypto.stats.costBasis": "Total invested",
"crypto.stats.costBasisHint": "actual amount spent buying",
"crypto.stats.bestPerformer": "Best Performer",
"crypto.stats.worstPerformer": "Worst Performer",
"crypto.stats.since": "since buying {{name}}",
"roi.calculator.title": "ROI Calculator",
"roi.calculator.investmentLabel": "Investment amount",