DAG画布：文字清晰 + 无边画布 + 删除区回收站

1. 文字看不清修复：.dag-node hover stroke 继承到文字导致白色小字被描边盖糊 → label/sub 加 stroke:none，字号加大(13/11px)加粗
2. 无边画布：bg rect 扩大至±4000且与画布同色 + svg overflow:visible，大幅平移缩放不再露出边缘/裁剪节点
3. 删除区与回收站：
- 画布左下角🗑️删除区，节点拖入即软删除（deleted=1）
- 点击删除区打开回收站：恢复/彻底删除
- 后端 tasks 加 deleted/deleted_at 列，全查询过滤，trash/restore/hard-delete API，看板删除改软删
- 修复画布重建后事件失效：box监听每次重绘重绑、window监听只绑一次且拖拽状态提升为模块级(dagDrag)

app.py

@@ -166,8 +166,8 @@ def projects():
         return jsonify({'ok': True, 'id': pid})
     rows = db.q('SELECT * FROM projects ORDER BY id DESC')
     for r in rows:
-        r['task_count'] = db.q('SELECT COUNT(*) c FROM tasks WHERE project_id=?', (r['id'],))[0]['c']
+        r['task_count'] = db.q('SELECT COUNT(*) c FROM tasks WHERE project_id=? AND deleted=0', (r['id'],))[0]['c']
-        r['done_count'] = db.q('SELECT COUNT(*) c FROM tasks WHERE project_id=? AND status="done"',
+        r['done_count'] = db.q('SELECT COUNT(*) c FROM tasks WHERE project_id=? AND status="done" AND deleted=0',
                                (r['id'],))[0]['c']
     return jsonify({'ok': True, 'data': rows})
 
@@ -327,9 +327,9 @@ def tasks():
         return jsonify({'ok': True, 'id': tid})
     pid = request.args.get('project_id')
     if pid:
-        rows = db.q('SELECT * FROM tasks WHERE project_id=? ORDER BY id DESC', (int(pid),))
+        rows = db.q('SELECT * FROM tasks WHERE project_id=? AND deleted=0 ORDER BY id DESC', (int(pid),))
     else:
-        rows = db.q('SELECT * FROM tasks ORDER BY id DESC LIMIT 200')
+        rows = db.q('SELECT * FROM tasks WHERE deleted=0 ORDER BY id DESC LIMIT 200')
     return jsonify({'ok': True, 'data': [db.serialize_task(t) for t in rows]})
 
 
@@ -348,10 +348,14 @@ def task_detail(tid):
                                (t['worker_id'],), one=True)
         return jsonify({'ok': True, 'data': t})
     if request.method == 'DELETE':
+        # 软删除（进回收站）；?hard=1 物理删除
+        if request.args.get('hard') == '1':
             db.w('DELETE FROM task_logs WHERE task_id=?', (tid,))
             db.w('DELETE FROM cost_records WHERE task_id=?', (tid,))
             db.w('DELETE FROM tasks WHERE id=?', (tid,))
             return jsonify({'ok': True})
+        db.w('UPDATE tasks SET deleted=1, deleted_at=? WHERE id=?', (db.now(), tid))
+        return jsonify({'ok': True, 'trashed': True})
     d = request.get_json(force=True)
     # 只允许在非运行中修改基础字段
     if t['status'] == 'running':
@@ -372,12 +376,59 @@ def task_detail(tid):
     return jsonify({'ok': True})
 
 
+@app.route('/api/tasks/trash')
+@require_auth
+def tasks_trash():
+    """回收站：已软删除的任务列表"""
+    pid = request.args.get('project_id')
+    if pid:
+        rows = db.q('SELECT * FROM tasks WHERE deleted=1 AND project_id=? ORDER BY deleted_at DESC',
+                    (int(pid),))
+    else:
+        rows = db.q('SELECT * FROM tasks WHERE deleted=1 ORDER BY deleted_at DESC LIMIT 200')
+    return jsonify({'ok': True, 'data': [db.serialize_task(t) for t in rows]})
+
+
+@app.route('/api/tasks/<int:tid>/trash', methods=['POST'])
+@require_auth
+def task_trash(tid):
+    """软删除：移入回收站"""
+    t = db.q('SELECT * FROM tasks WHERE id=?', (tid,), one=True)
+    if not t:
+        return jsonify({'ok': False, 'error': '任务不存在'}), 404
+    if t['status'] == 'running':
+        return jsonify({'ok': False, 'error': '任务执行中，禁止删除'}), 400
+    db.w('UPDATE tasks SET deleted=1, deleted_at=? WHERE id=?', (db.now(), tid))
+    db.w('INSERT INTO task_logs (task_id, level, message, created_at) VALUES (?,?,?,?)',
+         (tid, 'warn', '🗑️ 任务已移入回收站', db.now()))
+    enterprise.audit(enterprise.current_actor(), 'task.trash', f'task#{tid}',
+                     f'「{t["title"]}」移入回收站', request.remote_addr or '')
+    return jsonify({'ok': True})
+
+
+@app.route('/api/tasks/<int:tid>/restore', methods=['POST'])
+@require_auth
+def task_restore(tid):
+    """从回收站恢复任务"""
+    t = db.q('SELECT * FROM tasks WHERE id=?', (tid,), one=True)
+    if not t:
+        return jsonify({'ok': False, 'error': '任务不存在'}), 404
+    db.w('UPDATE tasks SET deleted=0, deleted_at=NULL WHERE id=?', (tid,))
+    db.w('INSERT INTO task_logs (task_id, level, message, created_at) VALUES (?,?,?,?)',
+         (tid, 'info', '♻️ 任务已从回收站恢复', db.now()))
+    enterprise.audit(enterprise.current_actor(), 'task.restore', f'task#{tid}',
+                     f'「{t["title"]}」恢复', request.remote_addr or '')
+    return jsonify({'ok': True})
+
+
 @app.route('/api/tasks/<int:tid>/run', methods=['POST'])
 @require_auth
 def task_run(tid):
     t = db.q('SELECT * FROM tasks WHERE id=?', (tid,), one=True)
     if not t:
         return jsonify({'ok': False, 'error': '任务不存在'}), 404
+    if t['deleted']:
+        return jsonify({'ok': False, 'error': '任务已在回收站，请先恢复'}), 400
     if t['status'] == 'running':
         return jsonify({'ok': False, 'error': '任务已在执行中'}), 400
     ok, blockers = engine.check_dependencies(t)
@@ -477,8 +528,8 @@ def stats():
            'by_status': {}, 'recent': [], 'daily_cost': []}
     out['projects'] = db.q('SELECT COUNT(*) c FROM projects')[0]['c']
     out['workers'] = db.q('SELECT COUNT(*) c FROM workers')[0]['c']
-    out['tasks'] = db.q('SELECT COUNT(*) c FROM tasks')[0]['c']
+    out['tasks'] = db.q('SELECT COUNT(*) c FROM tasks WHERE deleted=0')[0]['c']
-    for r in db.q('SELECT status, COUNT(*) c FROM tasks GROUP BY status'):
+    for r in db.q('SELECT status, COUNT(*) c FROM tasks WHERE deleted=0 GROUP BY status'):
         out['by_status'][r['status']] = r['c']
     c = db.q('SELECT COALESCE(SUM(cost),0) cost, COALESCE(SUM(total_tokens),0) tokens '
              'FROM cost_records')[0]
@@ -486,14 +537,14 @@ def stats():
 
     # 一次通过率：done 且 rejection_count=0
     done = out['by_status'].get('done', 0)
-    clean = db.q('SELECT COUNT(*) c FROM tasks WHERE status="done" AND rejection_count=0')[0]['c']
+    clean = db.q('SELECT COUNT(*) c FROM tasks WHERE status="done" AND rejection_count=0 AND deleted=0')[0]['c']
     out['one_pass_rate'] = round(clean / done * 100, 1) if done else None
-    out['rework_count'] = db.q('SELECT COALESCE(SUM(rejection_count),0) c FROM tasks')[0]['c']
+    out['rework_count'] = db.q('SELECT COALESCE(SUM(rejection_count),0) c FROM tasks WHERE deleted=0')[0]['c']
 
     out['recent'] = db.q(
         'SELECT t.id, t.title, t.status, t.project_id, p.name AS project_name, t.updated_at '
         'FROM tasks t LEFT JOIN projects p ON p.id=t.project_id '
-        'ORDER BY t.updated_at DESC LIMIT 10')
+        'WHERE t.deleted=0 ORDER BY t.updated_at DESC LIMIT 10')
 
     # 近 7 天成本
     import datetime
@@ -522,7 +573,7 @@ def logs():
 @require_auth
 def workflow_run(pid):
     """执行整个工作流：跑所有就绪（无未完成前置）任务"""
-    rows = db.q('SELECT * FROM tasks WHERE project_id=? AND status IN ("todo","failed")', (pid,))
+    rows = db.q('SELECT * FROM tasks WHERE project_id=? AND deleted=0 AND status IN ("todo","failed")', (pid,))
     started, blocked = [], []
     for t in rows:
         ok, blockers = engine.check_dependencies(t)
@@ -538,7 +589,7 @@ def workflow_run(pid):
 @require_auth
 def project_dag(pid):
     """DAG 图数据：节点 + 边"""
-    rows = db.q('SELECT * FROM tasks WHERE project_id=? ORDER BY id', (pid,))
+    rows = db.q('SELECT * FROM tasks WHERE project_id=? AND deleted=0 ORDER BY id', (pid,))
     nodes, edges, id_map = [], [], {}
     for t in rows:
         node = db.serialize_task(t)

db.py

@@ -282,6 +282,10 @@ def _migrate():
     if 'depends_on' not in cols:
         conn.execute("ALTER TABLE tasks ADD COLUMN depends_on TEXT DEFAULT '[]'")
         conn.execute('CREATE INDEX IF NOT EXISTS idx_tasks_depends ON tasks(depends_on)')
+    if 'deleted' not in cols:
+        conn.execute('ALTER TABLE tasks ADD COLUMN deleted INTEGER DEFAULT 0')
+        conn.execute('ALTER TABLE tasks ADD COLUMN deleted_at INTEGER')
+        conn.execute('CREATE INDEX IF NOT EXISTS idx_tasks_deleted ON tasks(deleted)')
     conn.commit()
     conn.close()
 

engine.py

@@ -153,7 +153,7 @@ def _build_messages(task, worker):
 
 def _trigger_downstream(task):
     """DAG：任务完成后自动触发所有就绪的下游任务"""
-    rows = db.q('SELECT * FROM tasks WHERE status IN ("todo","failed")')
+    rows = db.q('SELECT * FROM tasks WHERE deleted=0 AND status IN ("todo","failed")')
     triggered = []
     for t in rows:
         deps = _deps(t)

static/app.js

@@ -360,13 +360,14 @@ function drawDag() {
   };
   body.innerHTML = `
     <div class="toolbar" style="margin-bottom:10px">
-      <span class="pager-tip">共 ${tasks.length} 个节点 · ${edges.length} 条依赖边${ready.length ? ` · ${ready.length} 个任务就绪` : ''} · 拖节点调位 / 滚轮缩放 / 拖空白平移 / 双击复位</span>
+      <span class="pager-tip">共 ${tasks.length} 个节点 · ${edges.length} 条依赖边${ready.length ? ` · ${ready.length} 个任务就绪` : ''} · 拖节点调位 / 滚轮缩放 / 拖空白平移 / 双击复位 / 拖节点到左下角🗑️删除</span>
       <button class="btn success" ${ready.length ? '' : 'disabled'} onclick="runWorkflow()">▶ 执行整个工作流（${ready.length}）</button>
     </div>
     <div class="dag-box" id="dag-box">
-      <svg id="dag-svg" width="100%" height="${Math.max(480, height)}" viewBox="0 0 ${width} ${height}" style="transform-origin:0 0">
+      <div class="dag-trash" id="dag-trash" onclick="openDagTrash()" title="点击查看回收站">🗑️ 删除区<span class="cnt" id="dag-trash-cnt">0</span></div>
+      <svg id="dag-svg" width="${width}" height="${Math.max(480, height)}" viewBox="0 0 ${width} ${height}" style="transform-origin:0 0">
         <defs><marker id="arrow" markerWidth="8" markerHeight="8" refX="7" refY="3" orient="auto"><path d="M0,0 L8,3 L0,6 Z" fill="#4a5878"/></marker></defs>
-        <rect id="dag-bg" x="-2000" y="-2000" width="${width + 4000}" height="${height + 4000}" fill="transparent"/>
+        <rect id="dag-bg" x="-4000" y="-4000" width="${width + 8000}" height="${height + 8000}" fill="var(--panel)"/>
         ${edges.map(e => {
           const a = dagState.pos[e.from], b = dagState.pos[e.to];
           if (!a || !b) return '';
@@ -388,97 +389,34 @@ function drawDag() {
     <div class="tab-note" style="margin-top:10px">💡 节点点击查看详情；拖动节点可自定义布局（自动记忆）；前置任务完成后下游自动触发。执行整个工作流 = 派发所有就绪任务（含失败重试）。</div>`;
   dagApplyView();
   bindDagEvents();
+  dagTrashCount();
 }
 
+let dagBound = false;   // window 级监听只绑定一次
+let dagDrag = null;        // 模块级拖拽状态（box 重绑后 window handler 仍可访问）
 function bindDagEvents() {
   const box = $('#dag-box');
-  const svg = $('#dag-svg');
+  if (!box) return;
-  if (!box || !svg) return;
   const s = dagState;
-  let down = null;   // {type:'node'|'pan', id?, sx, sy, ox, oy}
+  const svgEl = () => $('#dag-svg');
 
+  // box 级监听：每次 DOM 重建后重新绑定（box 是新元素）
   box.addEventListener('mousedown', e => {
     if (e.button !== 0) return;
     const nodeEl = e.target.closest('.dag-node');
     if (nodeEl) {
       const id = Number(nodeEl.dataset.id);
       const p = s.pos[id];
-      down = {type: 'node', id, sx: e.clientX, sy: e.clientY, ox: p.x, oy: p.y, moved: false};
+      dagDrag = {type: 'node', id, sx: e.clientX, sy: e.clientY, ox: p.x, oy: p.y, moved: false};
       nodeEl.style.cursor = 'grabbing';
-      svg.style.cursor = 'grabbing';
+      const sv = svgEl(); if (sv) sv.style.cursor = 'grabbing';
     } else {
-      down = {type: 'pan', sx: e.clientX, sy: e.clientY, ox: s.tx, oy: s.ty, moved: false};
+      dagDrag = {type: 'pan', sx: e.clientX, sy: e.clientY, ox: s.tx, oy: s.ty, moved: false};
-      svg.style.cursor = 'grabbing';
+      const sv = svgEl(); if (sv) sv.style.cursor = 'grabbing';
     }
     e.preventDefault();
   });
 
-  window.addEventListener('mousemove', e => {
-    if (!down) return;
-    const dx = e.clientX - down.sx, dy = e.clientY - down.sy;
-    if (!down.moved && Math.abs(dx) + Math.abs(dy) < 3) return;
-    down.moved = true;
-    if (down.type === 'node') {
-      const p = s.pos[down.id];
-      if (p) { p.x = down.ox + dx / s.scale; p.y = down.oy + dy / s.scale; }
-    } else {
-      s.tx = down.ox + dx;
-      s.ty = down.oy + dy;
-    }
-    dagApplyView();
-    if (down.type === 'node') {
-      // 轻量更新：节点坐标 + 关联连线
-      const svgEl = $('#dag-svg');
-      if (!svgEl) return;
-      svgEl.querySelectorAll('.dag-node').forEach(g => {
-        const nid = Number(g.dataset.id);
-        const pp = s.pos[nid];
-        if (!pp) return;
-        g.querySelector('rect').setAttribute('x', pp.x - 70);
-        g.querySelector('rect').setAttribute('y', pp.y - 24);
-        const ts = g.querySelectorAll('text');
-        ts[0].setAttribute('x', pp.x); ts[0].setAttribute('y', pp.y - 2);
-        ts[1].setAttribute('x', pp.x); ts[1].setAttribute('y', pp.y + 15);
-      });
-      // 以拖动节点为中心更新相关连线
-      const touched = new Set([down.id]);
-      projCtx.tasks.forEach(t => (t.depends_on || []).forEach(d => {
-        if (d === down.id || t.id === down.id) { touched.add(d); touched.add(t.id); }
-      }));
-      touched.forEach(tid => {
-        const a = s.pos[tid];
-        if (!a) return;
-        projCtx.tasks.forEach(t => {
-          if (t.id !== tid) return;
-          (t.depends_on || []).forEach(d => {
-            const b = s.pos[d];
-            if (!b) return;
-            const path = svgEl.querySelector(`path[data-e="${d}-${tid}"]`);
-            if (!path) return;
-            const mx = (b.x + a.x) / 2;
-            path.setAttribute('d', `M${b.x + 70},${b.y} C${mx},${b.y} ${mx},${a.y} ${a.x - 70},${a.y}`);
-          });
-        });
-      });
-    }
-  });
-
-  window.addEventListener('mouseup', () => {
-    if (!down) return;
-    const wasNode = down.type === 'node';
-    if (wasNode) {
-      const nodeEl = svg.querySelector('.dag-node[data-id="' + down.id + '"]');
-      if (nodeEl) nodeEl.style.cursor = 'grab';
-    }
-    svg.style.cursor = '';
-    if (down.moved) {
-      dagState.suppressClick = true;
-      setTimeout(() => { if (dagState) dagState.suppressClick = false; }, 400);
-      saveDagState();
-    }
-    down = null;
-  });
-
   // 滚轮缩放（以鼠标为锚点）
   box.addEventListener('wheel', e => {
     e.preventDefault();
@@ -486,7 +424,6 @@ function bindDagEvents() {
     const mx = e.clientX - rect.left, my = e.clientY - rect.top;
     const factor = e.deltaY < 0 ? 1.12 : 1 / 1.12;
     const ns = Math.min(3, Math.max(0.25, s.scale * factor));
-    // 保持鼠标指向的内容坐标不动
     const cx = (mx - s.tx) / s.scale, cy = (my - s.ty) / s.scale;
     s.scale = ns;
     s.tx = mx - cx * ns;
@@ -510,6 +447,165 @@ function bindDagEvents() {
     if (dagState.suppressClick) { dagState.suppressClick = false; return; }
     openTaskDetail(Number(nodeEl.dataset.id));
   });
+
+  // window 级监听：只绑定一次（handler 内现查 DOM，兼容画布重建）
+  if (dagBound) return;
+  dagBound = true;
+  window.addEventListener('mousemove', e => {
+    if (!dagDrag) return;
+    const st = dagState;
+    if (!st) return;
+    const dx = e.clientX - dagDrag.sx, dy = e.clientY - dagDrag.sy;
+    if (!dagDrag.moved && Math.abs(dx) + Math.abs(dy) < 3) return;
+    dagDrag.moved = true;
+    const trashEl = $('#dag-trash');
+    if (trashEl) {
+      const tb = trashEl.getBoundingClientRect();
+      trashEl.classList.toggle('hover',
+        e.clientX >= tb.left && e.clientX <= tb.right && e.clientY >= tb.top && e.clientY <= tb.bottom);
+    }
+    if (dagDrag.type === 'node') {
+      const p = st.pos[dagDrag.id];
+      if (p) { p.x = dagDrag.ox + dx / st.scale; p.y = dagDrag.oy + dy / st.scale; }
+    } else {
+      st.tx = dagDrag.ox + dx;
+      st.ty = dagDrag.oy + dy;
+    }
+    dagApplyView();
+    if (dagDrag.type === 'node') {
+      const svgEl2 = $('#dag-svg');
+      if (!svgEl2) return;
+      svgEl2.querySelectorAll('.dag-node').forEach(g => {
+        const nid = Number(g.dataset.id);
+        const pp = s.pos[nid];
+        if (!pp) return;
+        g.querySelector('rect').setAttribute('x', pp.x - 70);
+        g.querySelector('rect').setAttribute('y', pp.y - 24);
+        const ts = g.querySelectorAll('text');
+        ts[0].setAttribute('x', pp.x); ts[0].setAttribute('y', pp.y - 2);
+        ts[1].setAttribute('x', pp.x); ts[1].setAttribute('y', pp.y + 15);
+      });
+      const touched = new Set([dagDrag.id]);
+      projCtx.tasks.forEach(t => (t.depends_on || []).forEach(d => {
+        if (d === dagDrag.id || t.id === dagDrag.id) { touched.add(d); touched.add(t.id); }
+      }));
+      touched.forEach(tid => {
+        const a = st.pos[tid];
+        if (!a) return;
+        projCtx.tasks.forEach(t => {
+          if (t.id !== tid) return;
+          (t.depends_on || []).forEach(d => {
+            const b = s.pos[d];
+            if (!b) return;
+            const path = svgEl2.querySelector(`path[data-e="${d}-${tid}"]`);
+            if (!path) return;
+            const mx = (b.x + a.x) / 2;
+            path.setAttribute('d', `M${b.x + 70},${b.y} C${mx},${b.y} ${mx},${a.y} ${a.x - 70},${a.y}`);
+          });
+        });
+      });
+    }
+  });
+
+  window.addEventListener('mouseup', e => {
+    if (!dagDrag) return;
+    const wasNode = dagDrag.type === 'node';
+    const trashEl = $('#dag-trash');
+    let dropped = false;
+    if (wasNode && dagDrag.moved && trashEl) {
+      const tb = trashEl.getBoundingClientRect();
+      if (e.clientX >= tb.left && e.clientX <= tb.right && e.clientY >= tb.top && e.clientY <= tb.bottom) {
+        dropped = true;
+        dagTrashNode(dagDrag.id);
+      }
+    }
+    const sv = $('#dag-svg');
+    if (wasNode) {
+      const nodeEl = sv ? sv.querySelector('.dag-node[data-id="' + dagDrag.id + '"]') : null;
+      if (nodeEl) nodeEl.style.cursor = 'grab';
+    }
+    if (sv) sv.style.cursor = '';
+    if (trashEl) trashEl.classList.remove('hover');
+    if (dagDrag.moved && !dropped) {
+      dagState.suppressClick = true;
+      setTimeout(() => { if (dagState) dagState.suppressClick = false; }, 400);
+      saveDagState();
+    }
+    dagDrag = null;
+  });
+}
+
+/* --- DAG 回收站：软删除 / 恢复 / 彻底删除 --- */
+async function dagTrashCount() {
+  try {
+    const r = await api(`/api/tasks/trash?project_id=${projCtx.pid}`);
+    const el = $('#dag-trash-cnt');
+    if (el) el.textContent = r.data.length;
+  } catch (e) {}
+}
+
+async function dagTrashNode(taskId) {
+  try {
+    const t = projCtx.tasks.find(x => x.id === taskId);
+    await api(`/api/tasks/${taskId}/trash`, {method: 'POST'});
+    toast(`🗑️ 任务「${t?.title || taskId}」已移入回收站`, 'ok');
+    // 重新拉取项目数据并重绘画布
+    const tasks = (await api(`/api/tasks?project_id=${projCtx.pid}`)).data;
+    projCtx.tasks = tasks;
+    const idMap = {};
+    tasks.forEach(t => { idMap[t.id] = t; });
+    const {pos} = dagLayout(tasks, idMap);
+    Object.entries(dagState.pos).forEach(([k, v]) => { if (pos[k]) pos[k] = v; });
+    dagState.pos = pos;
+    drawDag();
+  } catch (e) { toast('删除失败：' + e.message, 'err'); }
+}
+
+async function openDagTrash() {
+  const r = await api(`/api/tasks/trash?project_id=${projCtx.pid}`);
+  const rows = r.data;
+  openModal(`
+    <h3>🗑️ 回收站 <span class="tag">${rows.length} 个已删除任务</span></h3>
+    <div class="tab-note">被删除的任务都在这里，可恢复或彻底删除（不可恢复）。</div>
+    <table><thead><tr><th>ID</th><th>标题</th><th>状态</th><th>删除时间</th><th>操作</th></tr></thead><tbody>
+    ${rows.map(t => `
+      <tr>
+        <td class="mono">#${t.id}</td>
+        <td>${esc(t.title)}</td>
+        <td>${STATUS[t.status]?.label || t.status}</td>
+        <td>${fmtTime(t.deleted_at)}</td>
+        <td><button class="btn mini success" onclick="dagRestoreTask(${t.id})">♻️ 恢复</button>
+            <button class="btn mini danger" onclick="dagHardDelete(${t.id})">彻底删除</button></td>
+      </tr>`).join('') || '<tr><td colspan="5" class="empty-td">回收站是空的</td></tr>'}
+    </tbody></table>
+    <button class="btn" data-close>关闭</button>`);
+}
+
+async function dagRestoreTask(taskId) {
+  try {
+    await api(`/api/tasks/${taskId}/restore`, {method: 'POST'});
+    toast('♻️ 已恢复', 'ok');
+    const tasks = (await api(`/api/tasks?project_id=${projCtx.pid}`)).data;
+    projCtx.tasks = tasks;
+    const idMap = {};
+    tasks.forEach(t => { idMap[t.id] = t; });
+    const {pos} = dagLayout(tasks, idMap);
+    Object.entries(dagState.pos).forEach(([k, v]) => { if (pos[k]) pos[k] = v; });
+    dagState.pos = pos;
+    drawDag();
+    closeModal();
+  } catch (e) { toast('恢复失败：' + e.message, 'err'); }
+}
+
+async function dagHardDelete(taskId) {
+  if (!confirm('彻底删除后不可恢复，确定？')) return;
+  try {
+    await api(`/api/tasks/${taskId}?hard=1`, {method: 'DELETE'});
+    toast('已彻底删除', 'ok');
+    closeModal();
+    openDagTrash();
+    dagTrashCount();
+  } catch (e) { toast('删除失败：' + e.message, 'err'); }
 }
 
 function renderDag() {
@@ -741,9 +837,9 @@ async function reopenTask(tid) {
   toast('任务已重新打开', 'ok'); closeModal(); refreshProj();
 }
 async function delTask(tid) {
-  if (!confirm('确认删除该任务及其日志/成本记录？')) return;
+  if (!confirm('删除后任务将移入回收站（DAG 画布左下角🗑️可恢复），确定？')) return;
   await api(`/api/tasks/${tid}`, {method:'DELETE'});
-  toast('已删除', 'ok'); closeModal(); refreshProj();
+  toast('已移入回收站', 'ok'); closeModal(); refreshProj();
 }
 
 /* ---------- AI 规划 WBS ---------- */

static/style.css

@@ -132,14 +132,17 @@ tr:hover td{background:var(--panel2)}
 .tabs a{padding:9px 16px;color:var(--muted);text-decoration:none;border-bottom:2px solid transparent;font-size:13px}
 .tabs a.active{color:var(--accent);border-bottom-color:var(--accent)}
 .dag-box{background:var(--panel);border:1px solid var(--border);border-radius:12px;overflow:hidden;height:520px;position:relative;touch-action:none;user-select:none;cursor:grab}
-.dag-box svg{display:block;transition:transform .05s linear}
+.dag-box svg{display:block;transition:transform .05s linear;overflow:visible}
 .dag-node{stroke:var(--border);stroke-width:1.5;rx:10;cursor:grab}
 .dag-node:hover{stroke:var(--accent)}
 .dag-node rect{stroke-width:1.5;rx:10}
-.dag-label{font-size:12px;fill:#ffffff;text-anchor:middle;pointer-events:none}
+.dag-label{font-size:13px;font-weight:600;fill:#ffffff;stroke:none;text-anchor:middle;pointer-events:none}
-.dag-sub{font-size:10px;fill:rgba(255,255,255,.78);text-anchor:middle;pointer-events:none}
+.dag-sub{font-size:11px;fill:rgba(255,255,255,.82);stroke:none;text-anchor:middle;pointer-events:none}
 .dag-edge{stroke:var(--border);stroke-width:1.5;fill:none;marker-end:url(#arrow)}
 .dag-edge.act{stroke:var(--accent)}
+.dag-trash{position:absolute;left:14px;bottom:14px;background:rgba(255,107,107,.1);border:1.5px dashed var(--danger);color:var(--danger);border-radius:10px;padding:8px 14px;font-size:12px;cursor:pointer;z-index:5;display:flex;align-items:center;gap:6px;backdrop-filter:blur(2px)}
+.dag-trash:hover,.dag-trash.hover{background:rgba(255,107,107,.25);border-style:solid}
+.dag-trash .cnt{background:var(--danger);color:#fff;border-radius:8px;padding:0 6px;font-size:11px}
 .alert-row{border-left:3px solid var(--border);padding:12px 14px;margin-bottom:8px;background:var(--panel2);border-radius:0 10px 10px 0;cursor:pointer}
 .alert-row.unread{border-left-color:var(--warn)}
 .alert-row.critical{border-left-color:var(--danger)}