```

refactor: 重命名项目名称从"体己"到"康康"

将整个项目的目录结构从"体己"重命名为"康康"，包括所有源代码文件、
资源文件、测试文件以及Xcode项目配置文件。此更改涉及项目中所有的
文件路径和应用入口点(App/TijiApp.swift → App/KangkangApp.swift)。
```

康康Tests/ModelsSchemaTests.swift

@@ -0,0 +1,79 @@
+import Testing
+import SwiftData
+import Foundation
+@testable import 体己
+
+struct ModelsSchemaTests {
+
+    private func makeContainer() throws -> ModelContainer {
+        let schema = Schema([
+            Indicator.self,
+            Report.self,
+            DiaryEntry.self,
+            Asset.self,
+            ChatTurn.self,
+        ])
+        let config = ModelConfiguration(schema: schema, isStoredInMemoryOnly: true)
+        return try ModelContainer(for: schema, configurations: [config])
+    }
+
+    @Test func insertIndicatorWithReportRelationship() throws {
+        let container = try makeContainer()
+        let ctx = ModelContext(container)
+
+        let report = Report(title: "春检", type: .checkup, reportDate: .now)
+        let indicator = Indicator(
+            name: "ALT",
+            value: "32",
+            unit: "U/L",
+            range: "9-50",
+            status: .normal,
+            report: report
+        )
+        ctx.insert(report)
+        ctx.insert(indicator)
+        try ctx.save()
+
+        #expect(report.indicators.count == 1)
+        #expect(indicator.report?.title == "春检")
+    }
+
+    @Test func cascadeDeleteReportRemovesIndicators() throws {
+        let container = try makeContainer()
+        let ctx = ModelContext(container)
+
+        let report = Report(title: "春检", type: .checkup, reportDate: .now)
+        let indicator = Indicator(
+            name: "ALT", value: "32", unit: "U/L", range: "9-50",
+            status: .normal, report: report
+        )
+        ctx.insert(report)
+        ctx.insert(indicator)
+        try ctx.save()
+
+        ctx.delete(report)
+        try ctx.save()
+
+        let remaining = try ctx.fetch(FetchDescriptor<Indicator>())
+        #expect(remaining.isEmpty)
+    }
+
+    @Test func chatTurnPersistsReferencedIDs() throws {
+        let container = try makeContainer()
+        let ctx = ModelContext(container)
+
+        let turn = ChatTurn(
+            question: "我的 LDL 怎么样?",
+            answer: "近 3 个月 LDL 偏高 [1]",
+            referencedIndicatorIDs: ["abc"],
+            referencedReportIDs: [],
+            decodeRate: 24.3
+        )
+        ctx.insert(turn)
+        try ctx.save()
+
+        let all = try ctx.fetch(FetchDescriptor<ChatTurn>())
+        #expect(all.count == 1)
+        #expect(all.first?.referencedIndicatorIDs == ["abc"])
+    }
+}