feat: 实现故居续学弹窗功能

新增功能：
- 统一续学逻辑：8个故居首页接入自动续学提示弹窗
- 完成判定：基于拼图碎片统一判断对话/体悟/内化是否完成
- 断点续学：对话回lastVisitedPlace、体悟回reflectionRoute、内化回internalization
- 触发条件：会话内每故居仅提示一次 + 首页视频播完后 + store加载成功/空时
- 安全防护：组件卸载后不再setState、同步失败不弹窗避免用旧状态误导

新增组件：
- ContinueLearningModal：纯CSS哑光米纸+朱红古籍风弹窗
- useResidenceContinue：封装触发逻辑+跳转+去重的共享hook

涉及文件：
- src/config/progression.ts：getResidenceStageCompletion、resolveResidenceContinueTarget
- src/hooks/useResidenceContinue.ts：统一续学hook
- src/components/layout/alert/continue-learning-modal.tsx：弹窗组件
- src/pages/*/home.tsx：8个故居首页接入

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/layout/alert/continue-learning-modal.tsx

@@ -0,0 +1,103 @@
+import type { MouseEvent } from 'react'
+
+export interface ContinueLearningModalProps {
+  /** 是否可见 */
+  visible?: boolean
+  /** 标题 */
+  title?: string
+  /** 提示正文 */
+  message?: string
+  /** 继续按钮文案 */
+  continueText?: string
+  /** 取消按钮文案 */
+  cancelText?: string
+  /** 点击「继续学习」回调 */
+  onContinue?: () => void
+  /** 点击「取消」或遮罩回调 */
+  onCancel?: () => void
+}
+
+/**
+ * ContinueLearningModal - 「未完成，是否继续学习」二选一确认弹窗
+ * 纯 CSS 实现，暖纸 + 朱红 + 金线古籍风，不依赖图片素材。
+ */
+const ContinueLearningModal = ({
+  visible = true,
+  title = '温馨提示',
+  message = '你还没有完成本故居的学习，是否继续上次的进度？',
+  continueText = '继续学习',
+  cancelText = '取消',
+  onContinue,
+  onCancel,
+}: ContinueLearningModalProps) => {
+  if (!visible) return null
+
+  const swallow = (e: MouseEvent) => {
+    e.preventDefault()
+    e.stopPropagation()
+  }
+
+  return (
+    <div className="fixed inset-0 z-10000 flex items-center justify-center">
+      {/* 遮罩 */}
+      <div className="absolute inset-0 bg-[#1f0e06]/65" onClick={onCancel} />
+
+      {/* 哑光米纸卡片 */}
+      <div
+        className="relative z-10 w-[920px] rounded-[28px] border-[3px] border-[#bfa05c] bg-gradient-to-b from-[#e4d4b2] to-[#d6c198] px-20 py-14 shadow-[0_24px_70px_rgba(20,8,4,0.5)]"
+        onClick={swallow}
+      >
+        {/* 内层细金线描边 */}
+        <div className="pointer-events-none absolute inset-[10px] rounded-[20px] border border-[#bfa05c]/55" />
+
+        <div className="relative flex flex-col items-center">
+          {/* 标题 */}
+          <div className="text-5xl font-bold tracking-[10px] text-[#a8281c]">{title}</div>
+
+          {/* 菱形分隔线 */}
+          <div className="mt-6 flex items-center gap-4">
+            <span className="h-[2px] w-24 bg-gradient-to-r from-transparent to-[#c0392b]/70" />
+            <span className="h-3 w-3 rotate-45 bg-[#c0392b]" />
+            <span className="h-[2px] w-24 bg-gradient-to-l from-transparent to-[#c0392b]/70" />
+          </div>
+
+          {/* 正文 */}
+          <p className="mt-10 max-w-[720px] text-center text-4xl font-medium leading-relaxed tracking-wide text-[#5c3a1e]">
+            {message}
+          </p>
+
+          {/* 按钮组 */}
+          <div className="mt-12 flex items-center gap-12">
+            {/* 取消（次要：米底描边） */}
+            <button
+              type="button"
+              className="cursor-pointer rounded-full border-2 border-[#bfa05c] bg-[#ecdcb6] px-14 py-3.5 text-3xl font-bold tracking-[4px] text-[#8a5326] transition-all duration-200 hover:bg-[#e2d0a8] active:scale-95"
+              onMouseDown={swallow}
+              onClick={(e) => {
+                swallow(e)
+                onCancel?.()
+              }}
+            >
+              {cancelText}
+            </button>
+
+            {/* 继续学习（主要：朱红渐变 + 金边） */}
+            <button
+              type="button"
+              className="cursor-pointer rounded-full border-2 border-[#e8c06a] bg-gradient-to-b from-[#d4452f] to-[#a8281c] px-14 py-3.5 text-3xl font-bold tracking-[4px] text-[#fdf1da] shadow-[0_8px_20px_rgba(150,40,25,0.45)] transition-all duration-200 hover:brightness-110 active:scale-95"
+              onMouseDown={swallow}
+              onClick={(e) => {
+                swallow(e)
+                onContinue?.()
+              }}
+            >
+              {continueText}
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ContinueLearningModal