feat: task timestamps, dirty state, confirmation dialog

- Task 模型增加 CreatedAt/CompletedAt，DB 读取和快照同步
- 总览页最近任务显示时间，限制5条，增加"更多 →"链接
- 任务中心增加创建时间/完成时间列
- 管控台"保存并下发"按钮：修改功能或视频源后才激活
- 下发前弹出变更摘要确认对话框
- 下发后回到管控台并显示任务ID

internal/models/task.go

@@ -2,6 +2,7 @@ package models
 
 import (
     "sync"
+    "time"
 )
 
 type TaskStatus string
@@ -21,13 +22,15 @@ type DeviceTaskStatus struct {
 }
 
 type Task struct {
-    ID        string                       `json:"task_id"`
+    ID          string                       `json:"task_id"`
-    Type      string                       `json:"type"`
+    Type        string                       `json:"type"`
-    DeviceIDs []string                     `json:"device_ids"`
+    DeviceIDs   []string                     `json:"device_ids"`
-    Payload   interface{}                  `json:"payload"`
+    Payload     interface{}                  `json:"payload"`
-    Status    TaskStatus                   `json:"status"`
+    Status      TaskStatus                   `json:"status"`
-    Devices   map[string]*DeviceTaskStatus `json:"devices"`
+    Devices     map[string]*DeviceTaskStatus `json:"devices"`
-    Mu        sync.RWMutex                 `json:"-"`
+    CreatedAt   string                       `json:"created_at"`
+    CompletedAt string                       `json:"completed_at"`
+    Mu          sync.RWMutex                 `json:"-"`
 }
 
 func NewTask(id, t string, deviceIDs []string, payload interface{}) *Task {
@@ -45,5 +48,6 @@ func NewTask(id, t string, deviceIDs []string, payload interface{}) *Task {
         Payload:   payload,
         Status:    TaskPending,
         Devices:   devices,
+        CreatedAt: time.Now().Format("2006-01-02 15:04:05"),
     }
 }

internal/service/task.go

@@ -98,12 +98,14 @@ func (s *TaskService) ListTasks() []models.Task {
         t.Mu.RLock()
 
         snap := models.Task{
-            ID:        t.ID,
+            ID:          t.ID,
-            Type:      t.Type,
+            Type:        t.Type,
-            DeviceIDs: append([]string(nil), t.DeviceIDs...),
+            DeviceIDs:   append([]string(nil), t.DeviceIDs...),
-            Payload:   t.Payload,
+            Payload:     t.Payload,
-            Status:    t.Status,
+            Status:      t.Status,
-            Devices:   make(map[string]*models.DeviceTaskStatus, len(t.Devices)),
+            CreatedAt:   t.CreatedAt,
+            CompletedAt: t.CompletedAt,
+            Devices:     make(map[string]*models.DeviceTaskStatus, len(t.Devices)),
         }
         for did, ds := range t.Devices {
             snap.Devices[did] = &models.DeviceTaskStatus{
@@ -149,6 +151,8 @@ func (s *TaskService) LoadPersistedTasks() error {
         item := items[i]
         s.tasks[item.ID] = models.NewTask(item.ID, item.Type, append([]string(nil), item.DeviceIDs...), item.Payload)
         s.tasks[item.ID].Status = item.Status
+        s.tasks[item.ID].CreatedAt = item.CreatedAt
+        s.tasks[item.ID].CompletedAt = item.CompletedAt
         for did, ds := range item.Devices {
             if ds == nil {
                 continue

internal/storage/tasks_repo.go

@@ -87,7 +87,7 @@ func (r *TasksRepo) List() ([]models.Task, error) {
         return nil, nil
     }
     rows, err := r.db.Query(`
-SELECT task_id, type, payload_json, status
+SELECT task_id, type, payload_json, status, COALESCE(created_at,''), COALESCE(finished_at,'')
 FROM tasks
 ORDER BY created_at DESC, task_id DESC
 `)
@@ -101,7 +101,8 @@ ORDER BY created_at DESC, task_id DESC
         var (
             id, tType, payloadJSON, status string
         )
-        if err := rows.Scan(&id, &tType, &payloadJSON, &status); err != nil {
+        var createdAt, finishedAt string
+        if err := rows.Scan(&id, &tType, &payloadJSON, &status, &createdAt, &finishedAt); err != nil {
             return nil, err
         }
         var payload any
@@ -111,11 +112,13 @@ ORDER BY created_at DESC, task_id DESC
             }
         }
         task := models.Task{
-            ID:      id,
+            ID:          id,
-            Type:    tType,
+            Type:        tType,
-            Payload: payload,
+            Payload:     payload,
-            Status:  models.TaskStatus(status),
+            Status:      models.TaskStatus(status),
-            Devices: map[string]*models.DeviceTaskStatus{},
+            CreatedAt:   createdAt,
+            CompletedAt: finishedAt,
+            Devices:     map[string]*models.DeviceTaskStatus{},
         }
 
         deviceRows, err := r.db.Query(`

internal/web/ui.go

@@ -485,6 +485,12 @@ func NewUI(discovery *service.DiscoveryService, registry *service.RegistryServic
             }
             return a / b
         },
+        "shortID": func(v string) string {
+            if len(v) > 8 {
+                return v[:8]
+            }
+            return v
+        },
     }).ParseFS(uiFS, "ui/templates/*.html")
     if err != nil {
         return nil, err
@@ -1186,12 +1192,11 @@ func (u *UI) actionConsoleSave(w http.ResponseWriter, r *http.Request) {
     }
 
     if len(taskIDs) == 1 {
-        http.Redirect(w, r, "/ui/tasks/"+taskIDs[0], http.StatusFound)
+        http.Redirect(w, r, "/ui/console?task="+taskIDs[0], http.StatusFound)
         return
     }
     if len(taskIDs) > 1 {
-        // Multiple devices: redirect to tasks list.
+        http.Redirect(w, r, "/ui/console?task="+taskIDs[0]+"&msg="+url.QueryEscape(fmt.Sprintf("已为 %d 台设备创建下发任务", len(taskIDs))), http.StatusFound)
-        http.Redirect(w, r, "/ui/tasks?msg="+url.QueryEscape(fmt.Sprintf("已为 %d 台设备创建配置下发任务", len(taskIDs))), http.StatusFound)
         return
     }
     if len(errs) > 0 {

internal/web/ui/templates/console.html

@@ -14,9 +14,9 @@
       <a class="nav-link console-tab" data-panel="video" role="tab" aria-selected="false">🎥 视频视图</a>
     </li>
     <li style="margin-left:auto;display:flex;gap:10px;align-items:center;padding:0 12px">
-      <span class="muted small">⬤ 上次下发成功</span>
+      <span id="console-status" class="muted small"></span>
-      <form method="post" action="/ui/console" style="display:inline">
+      <form id="console-form" method="post" action="/ui/console" style="display:inline">
-        <button class="btn" type="submit" style="padding:4px 14px;font-size:12px">保存并下发</button>
+        <button id="console-save-btn" class="btn" type="button" disabled style="padding:4px 14px;font-size:12px;opacity:0.5">保存并下发</button>
       </form>
     </li>
   </ul>
@@ -284,6 +284,104 @@
     div.innerHTML = html;
     document.body.appendChild(div.firstElementChild);
   }
+
+  // ---- dirty state tracking ----
+  var initialFeatures = {};
+  var initialSources = {};
+  document.querySelectorAll('.console-device-row').forEach(function(row) {
+    var did = row.getAttribute('data-device-id');
+    initialFeatures[did] = [];
+    initialSources[did] = [];
+    row.querySelectorAll('input[type=checkbox]').forEach(function(cb) {
+      if (cb.checked) initialFeatures[did].push(cb.value);
+    });
+    row.querySelectorAll('input[type=hidden][name^=device_]').forEach(function(h) {
+      initialSources[did].push(h.value);
+    });
+  });
+
+  function isDirty() {
+    var rows = document.querySelectorAll('.console-device-row');
+    for (var i = 0; i < rows.length; i++) {
+      var did = rows[i].getAttribute('data-device-id');
+      var feats = [];
+      rows[i].querySelectorAll('input[type=checkbox]:checked').forEach(function(cb) { feats.push(cb.value); });
+      if (feats.sort().join(',') !== (initialFeatures[did]||[]).sort().join(',')) return true;
+      var srcs = [];
+      rows[i].querySelectorAll('input[type=hidden][name^=device_]').forEach(function(h) { srcs.push(h.value); });
+      if (srcs.sort().join(',') !== (initialSources[did]||[]).sort().join(',')) return true;
+    }
+    return false;
+  }
+
+  function updateSaveButton() {
+    var btn = document.getElementById('console-save-btn');
+    if (isDirty()) {
+      btn.disabled = false;
+      btn.style.opacity = '1';
+      btn.style.cursor = 'pointer';
+    } else {
+      btn.disabled = true;
+      btn.style.opacity = '0.5';
+      btn.style.cursor = 'default';
+    }
+  }
+
+  // Listen for changes
+  document.querySelectorAll('.console-device-row input[type=checkbox]').forEach(function(cb) {
+    cb.addEventListener('change', updateSaveButton);
+  });
+
+  // Override addSourceToDeviceForm to also trigger dirty check
+  var _origAddSource = addSourceToDeviceForm;
+  addSourceToDeviceForm = function(did, src) {
+    _origAddSource(did, src);
+    updateSaveButton();
+  };
+
+  // Confirmation dialog
+  document.getElementById('console-save-btn').addEventListener('click', function() {
+    if (!isDirty()) return;
+    var summary = '';
+    document.querySelectorAll('.console-device-row').forEach(function(row) {
+      var did = row.getAttribute('data-device-id');
+      var nameEl = row.querySelector('.console-device-name');
+      var dname = nameEl ? nameEl.textContent : did;
+      summary += '<div style="font-weight:600;margin:8px 0 4px">' + dname + '</div>';
+      row.querySelectorAll('input[type=checkbox]:checked').forEach(function(cb) {
+        summary += '<div style="font-size:12px;padding-left:12px">☑ ' + cb.value + '</div>';
+      });
+      row.querySelectorAll('input[type=hidden][name^=device_]').forEach(function(h) {
+        summary += '<div style="font-size:12px;padding-left:12px;color:var(--muted)">🎥 ' + h.value + '</div>';
+      });
+    });
+    if (!summary) { alert('未选择任何检测功能或视频源'); return; }
+    var overlay = document.createElement('div');
+    overlay.className = 'confirm-overlay';
+    overlay.style.cssText = 'position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:9999;display:flex;align-items:center;justify-content:center';
+    overlay.innerHTML = '<div style="background:var(--surface);border-radius:8px;padding:24px;min-width:360px;max-width:500px" onclick="event.stopPropagation()">' +
+      '<div style="font-size:16px;font-weight:600;margin-bottom:4px">确认下发配置</div>' +
+      '<div style="font-size:12px;color:var(--muted);margin-bottom:16px">以下配置将被渲染并下发到设备，media-server 将热更新。</div>' +
+      summary +
+      '<div style="margin-top:16px;display:flex;gap:8px;justify-content:flex-end">' +
+      '<button class="btn secondary" style="font-size:12px" onclick="this.closest(\'.confirm-overlay\').remove()">取消</button>' +
+      '<button class="btn" style="font-size:12px" id="confirm-deploy-btn">确认下发</button>' +
+      '</div></div>';
+    overlay.addEventListener('click', function() { overlay.remove(); });
+    document.body.appendChild(overlay);
+    document.getElementById('confirm-deploy-btn').addEventListener('click', function() {
+      overlay.remove();
+      document.getElementById('console-form').submit();
+    });
+  });
+
+  // Show saved task info from URL param
+  (function() {
+    var m = location.search.match(/[?&]task=([^&]+)/);
+    if (m) {
+      document.getElementById('console-status').innerHTML = '✅ 任务 ' + m[1].substring(0,8) + ' 已创建';
+    }
+  })();
 })();
 </script>
 <style>

internal/web/ui/templates/dashboard.html

@@ -48,20 +48,26 @@
 </div>
 
 <div class="card">
-  <h2>最近任务</h2>
+  <div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:8px">
+    <h2 style="margin:0">最近任务</h2>
+    <a class="btn ghost" href="/ui/tasks" style="font-size:11px">更多 →</a>
+  </div>
   <div class="table-wrap" style="margin-top:10px">
     <table>
-      <thead><tr><th>任务标识</th><th>操作</th><th>状态</th><th>节点数</th></tr></thead>
+      <thead><tr><th>任务</th><th>操作</th><th>状态</th><th>创建时间</th><th>完成时间</th></tr></thead>
       <tbody>
-        {{range .Tasks}}
+        {{range $i, $t := .Tasks}}
+        {{if lt $i 5}}
         <tr>
-          <td><a class="mono" href="/ui/tasks/{{.ID}}">{{.ID}}</a></td>
+          <td><a class="mono" href="/ui/tasks/{{$t.ID}}">{{shortID $t.ID}}</a></td>
-          <td>{{taskActionLabel .Type}}</td>
+          <td>{{taskActionLabel $t.Type}}</td>
-          <td><span class="{{taskStatusClass .Status}}">{{taskStatusLabel .Status}}</span></td>
+          <td><span class="{{taskStatusClass $t.Status}}">{{taskStatusLabel $t.Status}}</span></td>
-          <td>{{len .DeviceIDs}}</td>
+          <td class="muted small">{{$t.CreatedAt}}</td>
+          <td class="muted small">{{$t.CompletedAt}}</td>
         </tr>
+        {{end}}
         {{else}}
-        <tr><td colspan="4" class="muted">暂无任务记录。</td></tr>
+        <tr><td colspan="5" class="muted">暂无任务记录。</td></tr>
         {{end}}
       </tbody>
     </table>

internal/web/ui/templates/tasks.html

@@ -4,13 +4,13 @@
   <div class="table-wrap" style="margin-top:10px">
     <table>
       <thead>
-        <tr><th>任务</th><th>类型</th><th>目标设备数</th><th>状态</th></tr>
+        <tr><th>任务</th><th>类型</th><th>设备数</th><th>状态</th><th>创建时间</th><th>完成时间</th></tr>
       </thead>
       <tbody>
         {{range .Tasks}}
         <tr>
           <td>
-            <div><a class="mono" href="/ui/tasks/{{.ID}}">{{.ID}}</a></div>
+            <div><a class="mono" href="/ui/tasks/{{.ID}}">{{shortID .ID}}</a></div>
             <div class="muted small">{{taskActionLabel .Type}}</div>
           </td>
           <td>
@@ -20,6 +20,8 @@
           <td>
             <span class="{{taskStatusClass .Status}}">{{taskStatusLabel .Status}}</span>
           </td>
+          <td class="muted small">{{.CreatedAt}}</td>
+          <td class="muted small">{{.CompletedAt}}</td>
         </tr>
         {{else}}
         <tr>

internal/web/ui_test.go

@@ -949,7 +949,7 @@ func TestUI_TaskPageRendersBatchSummaryAndDeviceResults(t *testing.T) {
         t.Fatalf("expected task page 200, got %d: %s", rrTask.Code, rrTask.Body.String())
     }
     body := rrTask.Body.String()
-    for _, want := range []string{"任务概览", "返回任务列表", "设备结果", "执行进度", "任务类型", "目标设备数", "批量配置", "下发识别配置", "2 台", "入口识别节点", "辅助节点", "edge-01", "edge-02", `id="task-status-value"`, "syncTaskStatus()", `href="/ui/tasks"`} {
+    for _, want := range []string{"任务概览", "返回任务列表", "设备结果", "执行进度", "任务类型", "设备数", "批量配置", "下发识别配置", "2 台", "入口识别节点", "辅助节点", "edge-01", "edge-02", `id="task-status-value"`, "syncTaskStatus()", `href="/ui/tasks"`} {
         if !strings.Contains(body, want) {
             t.Fatalf("expected task page to contain %q, got:\n%s", want, body)
         }
@@ -3366,7 +3366,7 @@ func TestUI_AuditAndSystemPagesDefineNewScopes(t *testing.T) {
 
     rrAudit := httptest.NewRecorder()
     ui.pageAudit(rrAudit, httptest.NewRequest(http.MethodGet, "/ui/audit", nil))
-    for _, want := range []string{"系统设置 / 日志审计 / 审计记录", "审计记录", "批量配置", "批量服务", "目标设备数", "2 台", "下发设备分配", "重启视频分析服务"} {
+    for _, want := range []string{"系统设置 / 日志审计 / 审计记录", "审计记录", "批量配置", "批量服务", "设备数", "2 台", "下发设备分配", "重启视频分析服务"} {
         if !strings.Contains(rrAudit.Body.String(), want) {
             t.Fatalf("expected audit HTML to contain %q", want)
         }
@@ -3384,7 +3384,7 @@ func TestUI_AuditAndSystemPagesDefineNewScopes(t *testing.T) {
 
     rrTasks := httptest.NewRecorder()
     ui.pageTasks(rrTasks, httptest.NewRequest(http.MethodGet, "/ui/tasks", nil))
-    for _, want := range []string{"执行历史", "目标设备数"} {
+    for _, want := range []string{"执行历史", "设备数"} {
         if !strings.Contains(rrTasks.Body.String(), want) {
             t.Fatalf("expected tasks HTML to contain %q", want)
         }
@@ -3701,7 +3701,7 @@ func TestUI_TasksPageOwnsBatchExecutionDomain(t *testing.T) {
     ui := newTestUI(t)
     html := renderPage(t, ui, "/ui/tasks")
 
-    for _, text := range []string{"执行历史", "目标设备数"} {
+    for _, text := range []string{"执行历史", "设备数"} {
         if !strings.Contains(html, text) {
             t.Fatalf("expected tasks text %q in html: %s", text, html)
         }