写作台适配手机：列表与章节工作区分屏切换

- 手机上章节列表与工作区分两屏，点章节进入工作区，左上角返回
- 列表页顶部提供「继续下一章」与流程说明；工作区顶栏使用紧凑版控制按钮
- 在列表页启动写作后自动进入即将处理的章节
- 精简标签页文字、正文留白与版本信息，避免小屏截断

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/pages/projects/[id]/index.vue

@@ -17,6 +17,20 @@ watch(() => chapters.value.find(c => c.status === 'writing')?.id, (id) => {
   if (id) selectedId.value = id
 })
 
+// 手机上列表和工作区分两屏：URL 带 ?c= 时显示章节工作区
+const showDetail = computed(() => Boolean(route.query.c))
+function backToList() {
+  const { c: _c, ...rest } = route.query
+  router.replace({ query: rest })
+}
+// 在列表页点「继续下一章」后，直接进入即将处理的章节
+watch(running, (v) => {
+  if (!v || route.query.c) return
+  const next = chapters.value.find(c => c.status !== 'approved')
+  if (next) selectedId.value = next.id
+})
+const nextChapter = computed(() => chapters.value.find(c => c.status !== 'approved'))
+
 const totalWords = computed(() => chapters.value.reduce((s, c) => s + c.wordCount, 0))
 const approvedCount = computed(() => chapters.value.filter(c => c.status === 'approved').length)
 
@@ -48,7 +62,7 @@ function liveWords(chapterId: string) {
 </script>
 
 <template>
-  <UDashboardPanel id="chapter-list" :default-size="22" :min-size="16" :max-size="35" resizable>
+  <UDashboardPanel id="chapter-list" :default-size="22" :min-size="16" :max-size="35" resizable :class="showDetail ? 'hidden lg:flex' : ''">
     <template #header>
       <UDashboardNavbar title="章节">
         <template #right>
@@ -65,6 +79,18 @@ function liveWords(chapterId: string) {
       </UDashboardNavbar>
     </template>
     <template #body>
+      <!-- 手机端：写作入口与说明（桌面端在右侧顶部） -->
+      <div class="lg:hidden rounded-lg border border-default bg-elevated/40 p-3 mb-3 space-y-2">
+        <RunControls />
+        <p class="text-xs text-muted leading-relaxed">
+          <template v-if="nextChapter">
+            点「继续下一章」：主编为第{{ nextChapter.index }}章写简报 → 作家写正文 → 写完暂停等你确认。也可以点下面任意一章，手动生成简报、指定作家后再写。
+          </template>
+          <template v-else>
+            点「继续下一章」，主编会先规划后续章节。
+          </template>
+        </p>
+      </div>
       <div class="text-xs text-muted flex gap-3 px-1 -mt-1 mb-2">
         <span>{{ approvedCount }}/{{ chapters.length }} 章已确认</span>
         <span>{{ formatWords(totalWords) }}</span>
@@ -88,6 +114,7 @@ function liveWords(chapterId: string) {
             <span class="text-xs text-muted tabular-nums w-10 shrink-0">第{{ c.index }}章</span>
             <span class="truncate text-sm font-medium flex-1">{{ c.title || '（未命名）' }}</span>
             <UIcon v-if="c.status === 'writing'" name="i-lucide-loader-circle" class="size-3.5 animate-spin text-warning" />
+            <UIcon name="i-lucide-chevron-right" class="size-4 text-muted lg:hidden" />
           </div>
           <div class="flex items-center gap-2 mt-1 ps-12">
             <UBadge :color="CHAPTER_STATUS_COLOR[c.status]" variant="subtle" size="sm">
@@ -101,11 +128,19 @@ function liveWords(chapterId: string) {
     </template>
   </UDashboardPanel>
 
-  <UDashboardPanel id="chapter-main">
+  <UDashboardPanel id="chapter-main" :class="showDetail ? '' : 'hidden lg:flex'">
     <template #header>
-      <UDashboardNavbar :title="store.project.value?.title">
+      <UDashboardNavbar :title="store.project.value?.title" :ui="{ title: 'truncate' }">
+        <template #leading>
+          <UButton icon="i-lucide-arrow-left" label="章节" color="neutral" variant="ghost" size="sm" class="lg:hidden -ms-1.5" @click="backToList" />
+        </template>
         <template #right>
-          <RunControls />
+          <div class="hidden lg:block">
+            <RunControls />
+          </div>
+          <div class="lg:hidden">
+            <RunControls compact />
+          </div>
         </template>
       </UDashboardNavbar>
     </template>