migration start

tasks/native-business-logic-migration/03-implement-ios-data-models.md

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+# 03. Implement iOS data models (Swift)
+
+meta:
+  id: native-business-logic-migration-03
+  feature: native-business-logic-migration
+  priority: P0
+  depends_on: [native-business-logic-migration-02]
+  tags: [implementation, ios, data-models]
+
+objective:
+- Implement all data models in Swift following iOS conventions
+
+deliverables:
+- FeedItem.swift
+- Feed.swift
+- FeedSubscription.swift
+- SearchResult.swift
+- SearchFilters.swift
+- NotificationPreferences.swift
+- ReadingPreferences.swift
+- Supporting types and extensions
+
+tests:
+- Unit: Test property encoding/decoding
+- Unit: Test custom string interpolation
+- Unit: Test equality conformance
+
+acceptance_criteria:
+- All models conform to Codable
+- All models have proper equatable conformance
+- Date properties use ISO8601 formatter
+- Optional properties properly handled
+- Custom debug description implemented
+
+validation:
+- Run `swift test` in Xcode
+- Verify compilation with no warnings
+
+notes:
+- Use Swift 5.9+ features
+- Follow Apple's API design guidelines
+- Consider using Identifiable protocol for List conformance