Add PlantGuide iOS app with plant identification and care management

- Implement camera capture and plant identification workflow
- Add Core Data persistence for plants, care schedules, and cached API data
- Create collection view with grid/list layouts and filtering
- Build plant detail views with care information display
- Integrate Trefle botanical API for plant care data
- Add local image storage for captured plant photos
- Implement dependency injection container for testability
- Include accessibility support throughout the app

Bug fixes in this commit:
- Fix Trefle API decoding by removing duplicate CodingKeys
- Fix LocalCachedImage to load from correct PlantImages directory
- Set dateAdded when saving plants for proper collection sorting

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

PlantGuideTests/TestFixtures/PlantCareSchedule+TestFixtures.swift

@@ -0,0 +1,163 @@
+//
+//  PlantCareSchedule+TestFixtures.swift
+//  PlantGuideTests
+//
+//  Test fixtures for PlantCareSchedule entity - provides factory methods for
+//  creating test instances with sensible defaults.
+//
+
+import Foundation
+@testable import PlantGuide
+
+// MARK: - PlantCareSchedule Test Fixtures
+
+extension PlantCareSchedule {
+
+    // MARK: - Factory Methods
+
+    /// Creates a mock care schedule with default values for testing
+    /// - Parameters:
+    ///   - id: The schedule's unique identifier. Defaults to a new UUID.
+    ///   - plantID: ID of the plant this schedule belongs to. Defaults to a new UUID.
+    ///   - lightRequirement: Light needs. Defaults to .partialShade.
+    ///   - wateringSchedule: Watering description. Defaults to "Weekly".
+    ///   - temperatureRange: Safe temp range. Defaults to 18...26.
+    ///   - fertilizerSchedule: Fertilizer description. Defaults to "Monthly".
+    ///   - tasks: Array of care tasks. Defaults to empty.
+    /// - Returns: A configured PlantCareSchedule instance for testing
+    static func mock(
+        id: UUID = UUID(),
+        plantID: UUID = UUID(),
+        lightRequirement: LightRequirement = .partialShade,
+        wateringSchedule: String = "Weekly",
+        temperatureRange: ClosedRange<Int> = 18...26,
+        fertilizerSchedule: String = "Monthly",
+        tasks: [CareTask] = []
+    ) -> PlantCareSchedule {
+        PlantCareSchedule(
+            id: id,
+            plantID: plantID,
+            lightRequirement: lightRequirement,
+            wateringSchedule: wateringSchedule,
+            temperatureRange: temperatureRange,
+            fertilizerSchedule: fertilizerSchedule,
+            tasks: tasks
+        )
+    }
+
+    /// Creates a mock schedule with watering tasks
+    /// - Parameters:
+    ///   - plantID: ID of the plant this schedule belongs to
+    ///   - taskCount: Number of watering tasks to generate. Defaults to 4.
+    ///   - startDate: Starting date for first task. Defaults to tomorrow.
+    /// - Returns: A schedule with generated watering tasks
+    static func mockWithWateringTasks(
+        plantID: UUID = UUID(),
+        taskCount: Int = 4,
+        startDate: Date = Calendar.current.date(byAdding: .day, value: 1, to: Date())!
+    ) -> PlantCareSchedule {
+        let tasks = (0..<taskCount).map { index in
+            CareTask.mockWatering(
+                plantID: plantID,
+                scheduledDate: Calendar.current.date(byAdding: .day, value: index * 7, to: startDate)!
+            )
+        }
+        return mock(
+            plantID: plantID,
+            wateringSchedule: "Every 7 days",
+            tasks: tasks
+        )
+    }
+
+    /// Creates a mock schedule with mixed care tasks
+    /// - Parameters:
+    ///   - plantID: ID of the plant this schedule belongs to
+    /// - Returns: A schedule with watering and fertilizing tasks
+    static func mockWithMixedTasks(plantID: UUID = UUID()) -> PlantCareSchedule {
+        let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: Date())!
+        let nextWeek = Calendar.current.date(byAdding: .day, value: 7, to: Date())!
+        let nextMonth = Calendar.current.date(byAdding: .day, value: 30, to: Date())!
+
+        let tasks: [CareTask] = [
+            .mockWatering(plantID: plantID, scheduledDate: tomorrow),
+            .mockWatering(plantID: plantID, scheduledDate: nextWeek),
+            .mockFertilizing(plantID: plantID, scheduledDate: nextMonth)
+        ]
+
+        return mock(
+            plantID: plantID,
+            wateringSchedule: "Weekly",
+            fertilizerSchedule: "Monthly during growing season",
+            tasks: tasks
+        )
+    }
+
+    /// Creates a mock schedule for a tropical plant (high humidity, frequent watering)
+    static func mockTropical(plantID: UUID = UUID()) -> PlantCareSchedule {
+        mock(
+            plantID: plantID,
+            lightRequirement: .partialShade,
+            wateringSchedule: "Every 3 days",
+            temperatureRange: 20...30,
+            fertilizerSchedule: "Biweekly during growing season"
+        )
+    }
+
+    /// Creates a mock schedule for a succulent (low water, full sun)
+    static func mockSucculent(plantID: UUID = UUID()) -> PlantCareSchedule {
+        mock(
+            plantID: plantID,
+            lightRequirement: .fullSun,
+            wateringSchedule: "Every 14 days",
+            temperatureRange: 15...35,
+            fertilizerSchedule: "Monthly during spring and summer"
+        )
+    }
+
+    /// Creates a mock schedule for a shade-loving plant
+    static func mockShadePlant(plantID: UUID = UUID()) -> PlantCareSchedule {
+        mock(
+            plantID: plantID,
+            lightRequirement: .lowLight,
+            wateringSchedule: "Weekly",
+            temperatureRange: 16...24,
+            fertilizerSchedule: "Every 6 weeks"
+        )
+    }
+
+    /// Creates a mock schedule with overdue tasks
+    static func mockWithOverdueTasks(plantID: UUID = UUID()) -> PlantCareSchedule {
+        let yesterday = Calendar.current.date(byAdding: .day, value: -1, to: Date())!
+        let lastWeek = Calendar.current.date(byAdding: .day, value: -7, to: Date())!
+        let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: Date())!
+
+        let tasks: [CareTask] = [
+            .mockWatering(plantID: plantID, scheduledDate: lastWeek),    // Overdue
+            .mockWatering(plantID: plantID, scheduledDate: yesterday),   // Overdue
+            .mockWatering(plantID: plantID, scheduledDate: tomorrow)     // Upcoming
+        ]
+
+        return mock(
+            plantID: plantID,
+            tasks: tasks
+        )
+    }
+
+    /// Creates a mock schedule with completed tasks
+    static func mockWithCompletedTasks(plantID: UUID = UUID()) -> PlantCareSchedule {
+        let yesterday = Calendar.current.date(byAdding: .day, value: -1, to: Date())!
+        let tomorrow = Calendar.current.date(byAdding: .day, value: 1, to: Date())!
+        let nextWeek = Calendar.current.date(byAdding: .day, value: 7, to: Date())!
+
+        let tasks: [CareTask] = [
+            .mockWatering(plantID: plantID, scheduledDate: yesterday, completedDate: yesterday),
+            .mockWatering(plantID: plantID, scheduledDate: tomorrow),
+            .mockWatering(plantID: plantID, scheduledDate: nextWeek)
+        ]
+
+        return mock(
+            plantID: plantID,
+            tasks: tasks
+        )
+    }
+}