fix(V0.2): 任务模块 4 个 bug —— 覆盖层安全区/返回键/项目列表排序/键盘遮挡

1. 项目管理等 cs-page 覆盖层与系统状态栏重合:
   .cs-page 补 padding-top: var(--safe-top) (复用 main.jsx 实测校准的变量)

2. 项目管理按返回键跑到上一个 Tab:
   新增 useOverlayBack —— 覆盖层打开时 pushState 哨兵, 返回键先关覆盖层
   应用于 项目管理(内层视图先回主区) 与 任务详情弹层

3. 更多项目页:
   - 头部补「+ 新建」入口
   - 项目列表支持长按拖动排序(纵向), 顺序存设备端, 与首屏最近项目共用 recentOrder
   - 顺带修复首屏 RecentProjects 拖动排序的闭包缺陷(监听器读到旧下标, 首次移动
     会 splice(-1)); 两处均改为 ref 取当前下标

4. 任务详情输入子任务被键盘遮挡:
   新增 useKeyboardInset (visualViewport 差值), 键盘弹出时抬升弹层内容并收缩
   maxHeight; 输入框聚焦后再 scrollIntoView 到可视区中部 (双保险)

已验证: 99 文件语法 0 错误、相对导入 0 缺失

src/components/task/RecentProjects.jsx

@@ -12,7 +12,8 @@ const MOVE_TOLERANCE = 8
 
 export default function RecentProjects({ projects, currentId, onSelect, onMore }) {
   const [ver, setVer] = useState(0)             // 手动排序后强制重算
-  const [dragIdx, setDragIdx] = useState(-1)    // 拖拽中的卡片下标
+  const [dragIdx, setDragIdx] = useState(-1)    // 拖拽中的卡片下标 (视觉态)
+  const dragIdxRef = useRef(-1)                 // 监听器闭包读的下标 (state 在闭包里是旧值)
   const barRef = useRef(null)
   const timer = useRef(null)
   const start = useRef(null)
@@ -51,9 +52,9 @@ export default function RecentProjects({ projects, currentId, onSelect, onMore }
   }
 
   // 按横坐标计算落点下标 (卡片宽 96 + 间距 8)
-  function indexAt(x) {
+  function indexAt(x, fallback = -1) {
     const rect = barRef.current?.getBoundingClientRect()
-    if (!rect) return dragIdx
+    if (!rect) return fallback
     const rel = x - rect.left + 4
     return Math.max(0, Math.min(shown.length - 1, Math.floor(rel / 104)))
   }
@@ -68,13 +69,16 @@ export default function RecentProjects({ projects, currentId, onSelect, onMore }
       return
     }
     if (ev.cancelable) ev.preventDefault()
-    const to = indexAt(p.x)
+    // 用 ref 取当前拖拽下标: 监听器闭包里的 state 是旧值
-    if (to !== dragIdx && to >= 0) {
+    const from = dragIdxRef.current
+    const to = indexAt(p.x, from)
+    if (to !== from && to >= 0 && from >= 0) {
       // 实时换位: 重写设备端顺序, ver 触发重算 (shown 由 memo 派生)
       const ids = shown.map((p2) => p2.id)
-      const [moved] = ids.splice(dragIdx, 1)
+      const [moved] = ids.splice(from, 1)
       ids.splice(to, 0, moved)
       setRecentOrder(ids)
+      dragIdxRef.current = to
       setDragIdx(to)
       setVer((v) => v + 1)
     }
@@ -83,6 +87,7 @@ export default function RecentProjects({ projects, currentId, onSelect, onMore }
   function onEnd() {
     if (active.current) setVer((v) => v + 1)
     cleanup()
+    dragIdxRef.current = -1
     setDragIdx(-1)
   }
 
@@ -92,6 +97,7 @@ export default function RecentProjects({ projects, currentId, onSelect, onMore }
     start.current = p
     active.current = false
     cleanup()
+    dragIdxRef.current = i
     timer.current = setTimeout(() => {
       active.current = true
       setDragIdx(i)

src/hooks/useKeyboardInset.js

@@ -0,0 +1,27 @@
+import { useEffect, useState } from 'react'
+
+// 键盘弹出时的"插入量": window.innerHeight 与 visualViewport.height 的差
+// Android WebView 键盘弹出时 visualViewport 变小; 用它把底部弹层的内容抬到键盘上方,
+// 避免输入框(如任务详情里的"添加子任务")被键盘遮挡。
+// 阈值 90px 过滤掉地址栏收起之类的轻微抖动; 无 visualViewport 时恒为 0 (iOS 原生键盘通常整体缩放, 无需处理)。
+export default function useKeyboardInset() {
+  const [inset, setInset] = useState(0)
+
+  useEffect(() => {
+    const vv = window.visualViewport
+    if (!vv) return
+    const onChange = () => {
+      const diff = window.innerHeight - vv.height - vv.offsetTop
+      setInset(diff > 90 ? Math.round(diff) : 0)
+    }
+    vv.addEventListener('resize', onChange)
+    vv.addEventListener('scroll', onChange)
+    onChange()
+    return () => {
+      vv.removeEventListener('resize', onChange)
+      vv.removeEventListener('scroll', onChange)
+    }
+  }, [])
+
+  return inset
+}

src/hooks/useOverlayBack.js

@@ -0,0 +1,24 @@
+import { useEffect } from 'react'
+
+// 弹层 / 全屏覆盖层打开时拦截返回键: 先关弹层, 而不是离开当前路由 (bug: 返回跑到上一个 Tab)
+// 原理: 打开时 pushState 一条哨兵记录 (URL 不变), 返回键先消费它;
+//       popstate => 视为"关闭弹层"。正常关闭 (点 X / 遮罩) 时在 cleanup 里 history.back() 撤掉哨兵。
+// 注意: close 必须把 open 置 false, 否则 cleanup 不会执行、哨兵残留。
+export default function useOverlayBack(open, close) {
+  useEffect(() => {
+    if (!open) return
+    let closedByBack = false
+    window.history.pushState({ __overlay: true }, '')
+    const onPop = () => {
+      closedByBack = true
+      close()
+    }
+    window.addEventListener('popstate', onPop)
+    return () => {
+      window.removeEventListener('popstate', onPop)
+      // 正常关闭: 撤销哨兵 (不产生可见的后退, 因为 URL 未变)
+      if (!closedByBack) window.history.back()
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+}

src/pages/task/ProjectManage.jsx

@@ -2,6 +2,7 @@ import { useState } from 'react'
 import { Dialog, Input, Toast } from 'antd-mobile'
 import { projectApi } from '../../api/task.js'
 import { useAuth } from '../../auth/AuthContext.jsx'
+import useOverlayBack from '../../hooks/useOverlayBack.js'
 import ColumnSettings from './ColumnSettings.jsx'
 import ProjectMembers from './ProjectMembers.jsx'
 
@@ -17,6 +18,9 @@ export default function ProjectManage({ project, onClose, onChanged, onExited })
   const isOwner = user?.id === project.ownerId
   const isPersonal = !!project.isPersonal
 
+  // 返回键: 内层视图(列设置/成员)先回主区, 主区再关闭整个项目管理
+  useOverlayBack(true, () => { if (view !== 'main') setView('main'); else onClose() })
+
   if (view === 'columns') {
     return (
       <ColumnSettings

src/pages/task/TaskDetail.jsx

@@ -5,6 +5,8 @@ import { STATUS_OPTIONS, STATUS_LABEL } from './date.js'
 import ExtrasCard from '../../components/task/ExtrasCard.jsx'
 import UserPicker from '../../components/task/UserPicker.jsx'
 import StatusDot from '../../components/task/StatusDot.jsx'
+import useKeyboardInset from '../../hooks/useKeyboardInset.js'
+import useOverlayBack from '../../hooks/useOverlayBack.js'
 
 // 任务详情 (T-TK-01~13, T-ST-03, T-AS-05)
 export default function TaskDetail({ task, columns, members, onClose, onSaved, onChanged }) {
@@ -23,6 +25,11 @@ export default function TaskDetail({ task, columns, members, onClose, onSaved, o
   const [picker, setPicker] = useState(null) // 'assignee' | 'members'
   const [copies, setCopies] = useState(null) // 其他项目列表(拷贝用)
 
+  // 键盘弹出插入量: 抬升弹层内容, 输入框不被遮挡 (bug#4)
+  const kb = useKeyboardInset()
+  // 返回键: 先关详情弹层, 不离开任务页
+  useOverlayBack(true, onClose)
+
   const assigneeName = members.find((m) => m.userId === form.assigneeId)?.name
   const memberNames = members.filter((m) => form.memberIds.includes(m.userId)).map((m) => m.name)
 
@@ -133,7 +140,14 @@ export default function TaskDetail({ task, columns, members, onClose, onSaved, o
       visible
       onMaskClick={onClose}
       position="bottom"
-      bodyStyle={{ borderTopLeftRadius: 12, borderTopRightRadius: 12, maxHeight: '88vh', overflowY: 'auto', padding: '16px 16px calc(env(safe-area-inset-bottom, 0px) + 20px)' }}
+      bodyStyle={{
+        borderTopLeftRadius: 12,
+        borderTopRightRadius: 12,
+        maxHeight: `calc(88vh - ${kb}px)`,
+        overflowY: 'auto',
+        // 键盘弹出时抬升内容 (kb), 否则"添加子任务"输入框被键盘遮挡
+        padding: `16px 16px calc(env(safe-area-inset-bottom, 0px) + 20px + ${kb}px)`,
+      }}
     >
       <div className="sheet-title">{task.title}</div>
       <div className="sheet-sub">
@@ -223,6 +237,10 @@ export default function TaskDetail({ task, columns, members, onClose, onSaved, o
           maxLength={200}
           onChange={(e) => setNewSub(e.target.value)}
           onKeyDown={(e) => { if (e.key === 'Enter') addSub() }}
+          onFocus={(e) => {
+            // 键盘弹出动画 (~300ms) 后把输入框滚到可视区中部, 双保险防遮挡
+            setTimeout(() => e.target.scrollIntoView({ block: 'center', behavior: 'smooth' }), 300)
+          }}
         />
       </div>
 

src/pages/task/TaskPage.jsx

@@ -1,17 +1,18 @@
-import { useCallback, useEffect, useState } from 'react'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { useLocation, useNavigate, useParams } from 'react-router-dom'
 import { Dialog, DotLoading, Input, Toast } from 'antd-mobile'
 import PageHeader from '../../components/PageHeader.jsx'
 import { projectApi } from '../../api/task.js'
 import {
   getLastProjectId, setLastProjectId, setRecentIds, prunePrefs,
+  getRecentIds, getRecentOrder, setRecentOrder,
 } from './prefs.js'
 import RecentProjects from '../../components/task/RecentProjects.jsx'
 import ProjectView from './ProjectView.jsx'
 
 // 任务模块容器 (T-PM-06, T-VW-08/09)
 //   /task        首屏: 上 = 最近项目条(3 个 + 更多入口), 下 = 当前项目的任务管理
-//   /task/list   完整项目列表(从「更多项目」进入)
+//   /task/list   完整项目列表(从「更多项目」进入; 支持拖动排序 + 新建)
 //   /task/:pid   打开指定项目(深链), 布局同首屏
 export default function TaskPage() {
   const { pid } = useParams()
@@ -21,6 +22,7 @@ export default function TaskPage() {
   const [projects, setProjects] = useState(null)
   const [err, setErr] = useState('')
   const [currentId, setCurrentId] = useState(null)
+  const [createSignal, setCreateSignal] = useState(0) // 通知项目列表弹起新建对话框
 
   const load = useCallback(() => {
     setErr('')
@@ -66,6 +68,9 @@ export default function TaskPage() {
         <div className="navbar-sub task-projbar">
           <span className="back" onClick={() => navigate('/task')}>‹</span>
           <span className="title">我的项目</span>
+          <div className="right">
+            <span className="mini-btn solid" onClick={() => setCreateSignal((v) => v + 1)}>+ 新建</span>
+          </div>
         </div>
         <div className="task-content">
           <ProjectList
@@ -74,6 +79,7 @@ export default function TaskPage() {
             onRetry={load}
             onOpen={(id) => { selectProject(id); navigate('/task') }}
             onChanged={load}
+            createSignal={createSignal}
           />
         </div>
       </div>
@@ -119,11 +125,40 @@ export default function TaskPage() {
   )
 }
 
+const COLORS = ['#1677ff', '#00b578', '#ff8f1f', '#a855f7', '#14b8a6', '#f43f9e']
+const colorOf = (p) => COLORS[Math.abs(p.id) % COLORS.length]
+const LONG_PRESS = 300
+const MOVE_TOLERANCE = 8
+
 // 完整项目列表 (从「更多项目」进入)
-function ProjectList({ projects, err, onRetry, onOpen, onChanged }) {
+//   顺序: 手动排序(recentOrder, 拖动结果)优先 > 最近访问 > 列表序; 已归档固定在底部
+function ProjectList({ projects, err, onRetry, onOpen, onChanged, createSignal }) {
   const [creating, setCreating] = useState(false)
   const [name, setName] = useState('')
   const [saving, setSaving] = useState(false)
+  const [ver, setVer] = useState(0)               // 拖动排序后强制重算
+  const [dragId, setDragId] = useState(null)      // 拖拽中的项目 id (视觉态)
+  const listRef = useRef(null)
+  const timer = useRef(null)
+  const startRef = useRef(null)
+  const activeRef = useRef(false)
+  const dragIdRef = useRef(null)
+
+  // 头部「+ 新建」→ 弹起新建对话框
+  useEffect(() => { if (createSignal) setCreating(true) }, [createSignal])
+
+  const active = useMemo(() => {
+    const manual = getRecentOrder()
+    const score = new Map(manual.map((id, i) => [id, i]))
+    let n = score.size
+    getRecentIds().forEach((id) => { if (!score.has(id)) score.set(id, n++) })
+    const fb = n + 1000
+    return projects
+      .filter((p) => !p.archived)
+      .slice()
+      .sort((a, b) => (score.get(a.id) ?? fb) - (score.get(b.id) ?? fb))
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [projects, ver])
 
   if (err) {
     return (
@@ -138,7 +173,6 @@ function ProjectList({ projects, err, onRetry, onOpen, onChanged }) {
     return <div className="empty"><div className="ico">··</div><p>加载中…</p><DotLoading color="#1677ff" /></div>
   }
 
-  const active = projects.filter((p) => !p.archived)
   const archived = projects.filter((p) => p.archived)
 
   async function create() {
@@ -159,14 +193,92 @@ function ProjectList({ projects, err, onRetry, onOpen, onChanged }) {
     }
   }
 
-  const COLORS = ['#1677ff', '#00b578', '#ff8f1f', '#a855f7', '#14b8a6', '#f43f9e']
+  // ---- 长按拖动排序 (纵向): 复用首屏卡片同一套 prefs.recentOrder ----
-  const colorOf = (p) => COLORS[Math.abs(p.id) % COLORS.length]
+  function cleanup() {
+    if (timer.current) { clearTimeout(timer.current); timer.current = null }
+    activeRef.current = false
+    startRef.current = null
+    dragIdRef.current = null
+    document.removeEventListener('touchmove', onMove, { passive: false })
+    document.removeEventListener('touchend', onEnd)
+    document.removeEventListener('mousemove', onMove)
+    document.removeEventListener('mouseup', onEnd)
+  }
+
+  const pointOf = (ev) => {
+    const t = ev.touches?.[0] || ev.changedTouches?.[0] || ev
+    return { x: t.clientX, y: t.clientY }
+  }
+
+  function indexAt(y) {
+    const items = Array.from(listRef.current?.querySelectorAll('[data-pid]') || [])
+    for (let i = 0; i < items.length; i++) {
+      const r = items[i].getBoundingClientRect()
+      if (y < r.top + r.height / 2) return i
+    }
+    return Math.max(0, items.length - 1)
+  }
+
+  function onMove(ev) {
+    const p = pointOf(ev)
+    if (!activeRef.current) {
+      if (startRef.current && (Math.abs(p.x - startRef.current.x) > MOVE_TOLERANCE || Math.abs(p.y - startRef.current.y) > MOVE_TOLERANCE)) {
+        if (timer.current) { clearTimeout(timer.current); timer.current = null }
+      }
+      return
+    }
+    if (ev.cancelable) ev.preventDefault()
+    const ids = active.map((x) => x.id)
+    const from = ids.indexOf(dragIdRef.current)
+    if (from < 0) return
+    const to = indexAt(p.y)
+    if (to !== from) {
+      const [moved] = ids.splice(from, 1)
+      ids.splice(to, 0, moved)
+      setRecentOrder(ids)
+      setVer((v) => v + 1)
+    }
+  }
+
+  function onEnd() {
+    cleanup()
+    setDragId(null)
+  }
+
+  function beginPress(p, ev) {
+    if (ev.button && ev.button !== 0) return
+    const pt = pointOf(ev)
+    startRef.current = pt
+    activeRef.current = false
+    cleanup()
+    dragIdRef.current = p.id
+    timer.current = setTimeout(() => {
+      activeRef.current = true
+      setDragId(p.id)
+      if (navigator.vibrate) navigator.vibrate(10)
+    }, LONG_PRESS)
+    document.addEventListener('touchmove', onMove, { passive: false })
+    document.addEventListener('touchend', onEnd)
+    document.addEventListener('mousemove', onMove)
+    document.addEventListener('mouseup', onEnd)
+  }
+
+  useEffect(() => () => cleanup(), [])
 
   return (
-    <>
+    <div ref={listRef}>
-      <div style={{ height: 8 }} />
+      <div className="rp-drag-tip" style={{ padding: '8px 14px 6px' }}>
+        长按项目可拖动排序（本机记忆，与首屏最近项目一致）
+      </div>
       {active.map((p) => (
-        <div className="proj-item" key={p.id} onClick={() => onOpen(p.id)}>
+        <div
+          className={`proj-item${p.id === dragId ? ' dragging' : ''}`}
+          key={p.id}
+          data-pid={p.id}
+          onTouchStart={(ev) => beginPress(p, ev)}
+          onMouseDown={(ev) => beginPress(p, ev)}
+          onClick={() => { if (!activeRef.current && !dragId) onOpen(p.id) }}
+        >
           <div className="pico" style={{ background: colorOf(p) }}>
             {(p.name || '?').slice(0, 1)}
           </div>
@@ -179,7 +291,7 @@ function ProjectList({ projects, err, onRetry, onOpen, onChanged }) {
               {p.taskCount ?? 0} 个任务 · {p.memberCount ?? 1} 人
             </div>
           </div>
-          <div className="pcount">›</div>
+          <div className="pcount">⠿</div>
         </div>
       ))}
 
@@ -223,6 +335,6 @@ function ProjectList({ projects, err, onRetry, onOpen, onChanged }) {
         ]}
         onClose={() => setCreating(false)}
       />
-    </>
+    </div>
   )
 }

src/styles/globals.css

@@ -1019,7 +1019,8 @@ body.me-safe-top .app-safe-top { height: 0; }
 }
 
 /* ---- 列设置 / 成员页 ---- */
-.cs-page { position: fixed; inset: 0; z-index: 1000; background: var(--color-bg); display: flex; flex-direction: column; }
+/* fixed 覆盖层要自己让出顶部状态栏 (复用 main.jsx 校准的 --safe-top), 否则与系统工具栏重合 */
+.cs-page { position: fixed; inset: 0; z-index: 1000; background: var(--color-bg); display: flex; flex-direction: column; padding-top: var(--safe-top); }
 .cs-page .navbar-sub { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: #fff; border-bottom: 1px solid var(--color-border); flex-shrink: 0; }
 .cs-page .navbar-sub .back { font-size: 20px; color: #666; line-height: 1; cursor: pointer; }
 .cs-page .navbar-sub .title { font-size: 16px; font-weight: 700; }
@@ -1131,3 +1132,6 @@ textarea.inp { resize: vertical; }
 .task-projbar .title { font-size: 15px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 .task-projbar .right { margin-left: auto; display: flex; gap: 6px; flex-shrink: 0; }
 .pv-embed .task-content { flex: 1 1 auto; }
+
+/* ---- 项目列表拖动排序 (bug#3) ---- */
+.proj-item.dragging { opacity: .65; transform: scale(.98); box-shadow: 0 8px 18px rgba(15,23,42,.16); z-index: 5; position: relative; }