docs(04): phase 4 drag interaction (broken)

.planning/codebase/STACK.md

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+# Technology Stack
+
+**Analysis Date:** 2026-01-18
+
+## Languages
+
+**Primary:**
+- Swift 5.0 - iOS app (`SportsTime/`)
+- Python 3.11+ - Data scraping and CloudKit uploading (`Scripts/sportstime_parser/`)
+
+**Secondary:**
+- JSON - Data interchange format, bundled bootstrap data, configuration
+
+## Runtime
+
+**iOS Environment:**
+- iOS 26+ (iOS 26.2 targeted per Xcode 26.2)
+- Swift 6 concurrency model enabled (`SWIFT_APPROACHABLE_CONCURRENCY = YES`, `SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor`)
+- Deployment targets: iPhone and iPad (`TARGETED_DEVICE_FAMILY = "1,2"`)
+
+**Python Environment:**
+- Python 3.11, 3.12, or 3.13
+- No lockfile (uses requirements.txt + pyproject.toml)
+
+## Frameworks
+
+**Core iOS Frameworks:**
+- SwiftUI - UI framework (entire app)
+- SwiftData - Local persistence (`Core/Models/Local/`)
+- CloudKit - Remote data sync (`Core/Services/CloudKitService.swift`)
+- StoreKit 2 - In-app purchases (`Core/Store/StoreManager.swift`)
+- MapKit - Geocoding, routing, map snapshots, EV chargers
+- CoreLocation - Location services
+- PDFKit - PDF generation (`Export/PDFGenerator.swift`)
+- BackgroundTasks - Background sync scheduling
+- Network - Network path monitoring (`NWPathMonitor`)
+- Photos/PhotosUI - Photo library access for visit imports
+- CryptoKit - Hash generation for canonical data
+
+**Testing:**
+- XCTest - Unit and UI tests (`SportsTimeTests/`, `SportsTimeUITests/`)
+- pytest 8.0+ - Python tests (`Scripts/sportstime_parser/tests/`)
+
+**Build/Dev:**
+- Xcode 26.2 - Build system
+- Swift Package Manager - Dependency management (single package)
+
+## Key Dependencies
+
+**iOS - Swift Package Manager:**
+- SwiftSoup (HTML parsing) - Used in `HistoricalGameScraper.swift` for Sports-Reference scraping
+
+**Python - pip:**
+| Package | Version | Purpose |
+|---------|---------|---------|
+| requests | 2.31.0+ | HTTP client for API calls |
+| beautifulsoup4 | 4.12.0+ | HTML parsing |
+| lxml | 5.0.0+ | XML/HTML parser backend |
+| rapidfuzz | 3.5.0+ | Fuzzy string matching for team names |
+| python-dateutil | 2.8.0+ | Date parsing |
+| pytz | 2024.1+ | Timezone handling |
+| rich | 13.7.0+ | CLI output formatting |
+| pyjwt | 2.8.0+ | JWT token generation for CloudKit auth |
+| cryptography | 42.0.0+ | ECDSA signing for CloudKit requests |
+
+**Dev Dependencies (Python):**
+- pytest 8.0+ - Test runner
+- pytest-cov 4.1+ - Coverage reporting
+- responses 0.25+ - HTTP mocking
+
+## Configuration
+
+**Environment Variables:**
+- CloudKit Web Services requires ECDSA private key for server-to-server auth
+- iOS app uses iCloud container identifier: `iCloud.com.sportstime.app`
+
+**Build Settings:**
+| Setting | Value | Purpose |
+|---------|-------|---------|
+| `SWIFT_VERSION` | 5.0 | Swift language version |
+| `SWIFT_APPROACHABLE_CONCURRENCY` | YES | Modern concurrency |
+| `SWIFT_DEFAULT_ACTOR_ISOLATION` | MainActor | Default isolation |
+| `SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY` | YES | Swift 6 prep |
+
+**Info.plist:**
+- Background modes: `remote-notification`, `fetch`, `processing`
+- Background task IDs: `com.sportstime.app.refresh`, `com.sportstime.app.db-cleanup`
+- Photo library usage description for visit imports
+
+**Entitlements:**
+- CloudKit: `iCloud.com.sportstime.app`
+- Push notifications: `aps-environment` (development)
+
+## Platform Requirements
+
+**Development:**
+- macOS with Xcode 26.2
+- Python 3.11+ for data scraping
+- iCloud account for CloudKit testing
+
+**Production:**
+- iOS 26+ (uses iOS 26 APIs, deprecated CLGeocoder annotations)
+- iCloud account for data sync (optional, works offline)
+- Network for CloudKit sync (offline-first architecture)
+
+## Data Architecture
+
+**Three-Tier Storage:**
+1. **Bundled JSON** (`SportsTime/Resources/`) - Bootstrap data for first launch
+2. **SwiftData** (local) - Runtime source of truth, offline-capable
+3. **CloudKit** (remote) - Public database for schedule updates
+
+**Key Data Files:**
+- `games_canonical.json` - Pre-bundled game schedules
+- `teams_canonical.json` - Team definitions
+- `stadiums_canonical.json` - Stadium definitions
+- `league_structure.json` - League/conference/division hierarchy
+- `team_aliases.json` - Historical team name mappings
+- `stadium_aliases.json` - Historical stadium name mappings
+
+**SwiftData Models:**
+- Canonical: `CanonicalStadium`, `CanonicalTeam`, `CanonicalGame`, `CanonicalSport`
+- User: `SavedTrip`, `StadiumVisit`, `UserPreferences`, `Achievement`
+- Sync: `SyncState`, `LeagueStructureModel`, `TeamAlias`, `StadiumAlias`
+
+---
+
+*Stack analysis: 2026-01-18*