feat(me,home): 模型推理自检 + 启动容错 + 首页假数据清理

- KangkangApp: ModelContainer 创建失败时重置本地 store 重建,
  避免 demo 阶段 schema 演进导致旧真机启动崩溃(注:生产需正式迁移)
- ModelSelfTestView: 正式的推理自检页(固定 prompt + 流式输出 + tok/s),
  仅当 LLM 模型就绪时从「模型管理」出现入口
- 删除 DEBUG-only 的 DebugAIRunner,自检转正为就绪后可见的正式入口
- HomeView: 删除写死的「今日摘记」假数据卡;问候改为按时段动态
  (早安/下午好/晚上好)+ 当天日期;影像档案数字接真实 @Query 计数
- MeView: 模型管理卡动态状态 + 关于页接真实版本号(用户改动一并纳入)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

康康/Features/Me/ModelSelfTestView.swift

@@ -0,0 +1,119 @@
+import SwiftUI
+
+/// 模型推理自检:加载 LLM 跑一段固定 prompt,流式显示输出 + tok/s。
+/// 模型就绪后从「我的 · 模型管理」进入,用于现场快速验证本地推理是否正常。
+struct ModelSelfTestView: View {
+    @State private var output = ""
+    @State private var phase: Phase = .idle
+    @State private var rate: Double = 0
+
+    private enum Phase: Equatable {
+        case idle, loading, running, done, failed(String)
+
+        var label: String {
+            switch self {
+            case .idle:            return "未开始"
+            case .loading:         return "加载模型…"
+            case .running:         return "推理中…"
+            case .done:            return "完成 ✓"
+            case .failed(let m):   return "失败:\(m)"
+            }
+        }
+    }
+
+    private let prompt = "用中文一句话介绍肝功能里 ALT 这个指标。"
+
+    private var isBusy: Bool { phase == .loading || phase == .running }
+
+    private var statusColor: Color {
+        switch phase {
+        case .failed: return Tj.Palette.brick
+        case .done:   return Tj.Palette.leaf
+        default:      return Tj.Palette.text2
+        }
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 16) {
+            VStack(alignment: .leading, spacing: 6) {
+                Text("测试 PROMPT")
+                    .font(.system(size: 11, weight: .semibold))
+                    .tracking(0.5)
+                    .foregroundStyle(Tj.Palette.text3)
+                Text(prompt)
+                    .font(.system(size: 14))
+                    .foregroundStyle(Tj.Palette.text)
+            }
+            .padding(14)
+            .frame(maxWidth: .infinity, alignment: .leading)
+            .tjCard()
+
+            HStack {
+                Text(phase.label)
+                    .font(.system(size: 13, weight: .medium))
+                    .foregroundStyle(statusColor)
+                    .lineLimit(1)
+                Spacer()
+                if rate > 0 {
+                    Text(String(format: "%.1f tok/s", rate))
+                        .font(.system(size: 12, design: .monospaced))
+                        .foregroundStyle(Tj.Palette.text3)
+                }
+            }
+
+            Button {
+                Task { await run() }
+            } label: {
+                Text(isBusy ? "运行中…" : "运行推理自检").frame(maxWidth: .infinity)
+            }
+            .buttonStyle(TjPrimaryButton())
+            .disabled(isBusy)
+
+            ScrollView {
+                Text(output.isEmpty ? "(暂无输出)" : output)
+                    .font(.system(.footnote, design: .monospaced))
+                    .foregroundStyle(Tj.Palette.text)
+                    .frame(maxWidth: .infinity, alignment: .leading)
+                    .textSelection(.enabled)
+                    .padding(12)
+            }
+            .frame(maxHeight: 280)
+            .background(
+                RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                    .fill(Tj.Palette.paper)
+            )
+            .overlay(
+                RoundedRectangle(cornerRadius: Tj.Radius.md, style: .continuous)
+                    .strokeBorder(Tj.Palette.lineSoft, lineWidth: 1)
+            )
+
+            Spacer()
+        }
+        .padding(16)
+        .background(Tj.Palette.sand.ignoresSafeArea())
+        .navigationTitle("推理自检")
+        .navigationBarTitleDisplayMode(.inline)
+    }
+
+    @MainActor
+    private func run() async {
+        output = ""
+        rate = 0
+        phase = .loading
+        do {
+            try await AIRuntime.shared.prepare()
+            phase = .running
+            for try await chunk in await AIRuntime.shared.generate(prompt: prompt, maxTokens: 200) {
+                output += chunk.text
+                rate = chunk.decodeRate
+            }
+            phase = .done
+        } catch {
+            phase = .failed(error.localizedDescription)
+        }
+    }
+}
+
+#Preview {
+    NavigationStack { ModelSelfTestView() }
+}