feat: Phase 1 – Konten, Kategorien, Transaktionen, EZB-Währungsumrechnung
Backend: - Modelle + Migration 0002: accounts, account_identifiers, category_groups, categories, transactions, exchange_rates (alle owner-gescoped). - EZB-Kursdienst (90-Tage/Historie) + Backfill-Skript; Umrechnung EUR<->CHF zum Buchungsdatum mit lokalem Cache und manueller Übersteuerung; EUR-Pivot (amount_eur_cents) eingefroren. - Kontostände + Netto-Vermögen (Umrechnung in Hauptwährung). - Router: accounts (inkl. IBAN-Identifikatoren), categories (Gruppen+Kategorien), transactions (Ausgabe/Einnahme/Transfer, cross-currency), rates. - Gruppierte Standard-Kategorien je Nutzer beim Anlegen. - pytest-Suite: Währung, Salden, Cross-Currency-Transfer, Nutzer-Isolation. Frontend: - Seiten Konten, Kategorien, Buchungen; Icon-Chip, Geldbetrag mit Umrechnung, Icon-/Farbwähler, Modal; erweitertes SVG-Icon-Set (Konto-/Kategorie-Icons). - Währungs-/Datumsformatierung (EUR de-DE, CHF de-CH), i18n DE/EN erweitert. - Live-Umrechnungs-Vorschau im Transfer-Formular. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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"""Wechselkurse: Status und Umrechnungs-Vorschau (für das Buchungsformular)."""
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from datetime import date
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from fastapi import APIRouter, Depends
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from sqlalchemy import func
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from sqlalchemy.orm import Session
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from ..database import get_db
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from ..deps import get_current_user
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from ..models import ExchangeRate, User
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from ..schemas import ConversionOut, RateStatus
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from ..services import currency
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router = APIRouter(prefix="/rates", tags=["rates"])
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@router.get("/status", response_model=list[RateStatus])
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def status(db: Session = Depends(get_db), _: User = Depends(get_current_user)):
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out: list[RateStatus] = []
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currencies = [
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row[0] for row in db.query(ExchangeRate.currency).distinct().order_by(ExchangeRate.currency)
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]
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for ccy in currencies:
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agg = db.query(
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func.count(ExchangeRate.date),
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func.min(ExchangeRate.date),
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func.max(ExchangeRate.date),
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).filter(ExchangeRate.currency == ccy).one()
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latest = (
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db.query(ExchangeRate)
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.filter(ExchangeRate.currency == ccy)
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.order_by(ExchangeRate.date.desc())
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.first()
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)
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out.append(
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RateStatus(
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currency=ccy,
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count=agg[0] or 0,
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min_date=agg[1],
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max_date=agg[2],
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latest_rate=float(latest.rate_per_eur) if latest else None,
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)
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)
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return out
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@router.get("/convert", response_model=ConversionOut)
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def convert(
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amount_cents: int,
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from_currency: str,
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to_currency: str,
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on: date | None = None,
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db: Session = Depends(get_db),
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_: User = Depends(get_current_user),
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):
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on = on or date.today()
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from_currency = from_currency.upper()
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to_currency = to_currency.upper()
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converted = currency.convert(db, amount_cents, from_currency, to_currency, on)
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# Anzeige-Kurs: EZB-Kurs der Nicht-EUR-Währung (Einheiten je 1 EUR).
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non_eur = to_currency if to_currency != "EUR" else from_currency
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rate = currency.rate_on(db, non_eur, on)
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return ConversionOut(
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amount_cents=amount_cents,
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from_currency=from_currency,
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to_currency=to_currency,
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date=on,
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converted_cents=converted,
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rate=float(rate) if rate is not None else None,
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)
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