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Stefan Lange-Hegermann 5a5e8b8fbe Optimize affiliate system and add locale-aware defaults

- Show BOM button for unsaved loads (no longer requires save first)
- Set US fallback affiliate tag for unknown countries
- Localize Amazon search queries in all 5 languages (EN/DE/ES/FR/NL)
- Add affiliate URL/country fields to SavedBattery model
- Auto-detect unit system (imperial for US locale, metric otherwise)
- Set charger input voltage based on locale (120V US, 230V EU)
- Remove StoreKitManager and CableProPaywallView
- Add CLAUDE.md project instructions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-17 23:06:45 +01:00

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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build & Test Commands

# Build
xcodebuild -scheme Cable -destination 'platform=iOS Simulator,name=iPhone 15' build

# Run all tests (unit + UI)
xcodebuild -scheme Cable -destination 'platform=iOS Simulator,name=iPhone 15' test

# Run only unit tests
xcodebuild -scheme Cable -destination 'platform=iOS Simulator,name=iPhone 15' -only-testing:CableTests test

# Open in Xcode (preferred for UI iteration with previews)
open Cable.xcodeproj

Requires Xcode 15+ and iOS 17 simulator. No external dependencies beyond the Xcode toolchain.

Architecture

SwiftUI + SwiftData app for sizing low-voltage electrical conductors (boats, RVs, off-grid).

Data Model Hierarchy

ElectricalSystem (top-level container) owns collections of:

SavedLoad — individual electrical loads with wire sizing parameters
SavedBattery — battery banks with chemistry-specific capacity rules
SavedCharger — charging equipment specs

All are @Model classes persisted via SwiftData. The container is configured in CableApp.swift and injected into the SwiftUI environment.

Key Layers

Calculation engine (Loads/ElectricalCalculations.swift): Pure static functions for wire cross-section sizing, voltage drop, power loss, and fuse recommendations. Uses copper resistivity (0.017 Ω·mm²/m) with a 5% max voltage drop constraint. Supports both metric (mm²) and imperial (AWG) wire standards.
CableCalculator (Loads/CableCalculator.swift): ObservableObject wrapper that bridges the calculation engine to SwiftUI views.
App-wide state: UnitSystemSettings (metric/imperial, persisted to UserDefaults) and StoreKitManager (subscription status) are injected as @EnvironmentObject.

SystemsView (root list) → LoadsView (per-system TabView with 4 tabs: Overview, Components, Batteries, Chargers) → individual editor modals for each entity type.

Feature Organization

Each feature has its own directory under Cable/: Loads/, Systems/, Batteries/, Chargers/, Overview/, Paywall/. Models and views for each feature live together.

Code Style

4-space indentation, trailing commas on multiline collections, 120-char soft line limit
UpperCamelCase for types, lowerCamelCase for methods/properties
Test naming: testScenario_expectedResult
Commit messages: short imperative subjects under 50 characters

Localization

5 languages: English (base), German, Spanish, French, Dutch. UI strings use String(localized:). Translation files are in *.lproj/Localizable.strings and Localizable.stringsdict.

StoreKit

Subscription product IDs: app.voltplan.cable.weekly, app.voltplan.cable.yearly. Pro features are gated via StoreKitManager.isPro.

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