fix(frontend): polish integration channel card actions

Align add-card height with channel cards, show actions on hover,
and replace delete dialogs with in-place popconfirm like model settings.

frontend/src/components/AgentEmbedChannelPanel.vue

@@ -45,12 +45,32 @@
                   variant="text"
                   shape="square"
                   size="small"
-                  class="channel-card__more"
+                  class="channel-card__action-btn channel-card__more"
                   @click.stop
                 >
                   <template #icon><t-icon name="ellipsis" /></template>
                 </t-button>
               </t-dropdown>
+              <t-popconfirm
+                :content="$t('embedPublish.deleteConfirm')"
+                :confirm-btn="{ content: $t('common.delete'), theme: 'danger' }"
+                :cancel-btn="{ content: $t('common.cancel') }"
+                placement="bottom-right"
+                @confirm="() => removeChannel(ch.id)"
+              >
+                <t-tooltip :content="$t('common.delete')" placement="top">
+                  <t-button
+                    theme="danger"
+                    shape="square"
+                    variant="text"
+                    size="small"
+                    class="channel-card__action-btn channel-card__delete"
+                    @click.stop
+                  >
+                    <template #icon><t-icon name="delete" /></template>
+                  </t-button>
+                </t-tooltip>
+              </t-popconfirm>
             </div>
           </button>
 
@@ -524,7 +544,7 @@
 <script setup lang="ts">
 import { computed, nextTick, reactive, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { DialogPlugin, MessagePlugin } from 'tdesign-vue-next'
+import { MessagePlugin } from 'tdesign-vue-next'
 import { useAuthStore } from '@/stores/auth'
 import SettingDrawer from '@/components/settings/SettingDrawer.vue'
 import EmbedChannelPreview from '@/components/EmbedChannelPreview.vue'
@@ -680,7 +700,7 @@ const defaultLocaleOptions = computed(() => ([
 ]))
 
 const channelMenuOptions = (ch: EmbedChannel) => {
-  const items: Array<{ content: string; value: string; theme?: 'error' }> = []
+  const items: Array<{ content: string; value: string }> = []
   if (isAdmin.value) {
     items.push({ content: t('embedPublish.preview'), value: 'preview' })
   }
@@ -688,9 +708,6 @@ const channelMenuOptions = (ch: EmbedChannel) => {
     content: ch.enabled ? t('common.off') : t('common.on'),
     value: 'toggle',
   })
-  if (isAdmin.value) {
-    items.push({ content: t('common.delete'), value: 'delete', theme: 'error' })
-  }
   return items
 }
 
@@ -701,10 +718,6 @@ function handleChannelMenuClick(data: { value?: string }, ch: EmbedChannel) {
   }
   if (data.value === 'toggle') {
     void toggleEnabled(ch, !ch.enabled)
-    return
-  }
-  if (data.value === 'delete') {
-    confirmRemoveChannel(ch.id)
   }
 }
 
@@ -1216,20 +1229,6 @@ const performRotate = async (id: string) => {
   }
 }
 
-const confirmRemoveChannel = (id: string) => {
-  const dialog = DialogPlugin.confirm({
-    header: t('common.delete'),
-    body: t('embedPublish.deleteConfirm'),
-    confirmBtn: { content: t('common.delete'), theme: 'danger' },
-    cancelBtn: t('common.cancel'),
-    onConfirm: async () => {
-      dialog.destroy()
-      await removeChannel(id)
-    },
-    onClose: () => dialog.destroy(),
-  })
-}
-
 const removeChannel = async (id: string) => {
   await deleteEmbedChannel(id)
   const map = loadStoredTokens()

frontend/src/components/IMChannelPanel.vue

@@ -51,12 +51,32 @@
                   variant="text"
                   shape="square"
                   size="small"
-                  class="channel-card__more"
+                  class="channel-card__action-btn channel-card__more"
                   @click.stop
                 >
                   <template #icon><t-icon name="ellipsis" /></template>
                 </t-button>
               </t-dropdown>
+              <t-popconfirm
+                :content="$t('agentEditor.im.deleteConfirm')"
+                :confirm-btn="{ content: $t('common.delete'), theme: 'danger' }"
+                :cancel-btn="{ content: $t('common.cancel') }"
+                placement="bottom-right"
+                @confirm="() => handleDelete(channel.id)"
+              >
+                <t-tooltip :content="$t('common.delete')" placement="top">
+                  <t-button
+                    theme="danger"
+                    shape="square"
+                    variant="text"
+                    size="small"
+                    class="channel-card__action-btn channel-card__delete"
+                    @click.stop
+                  >
+                    <template #icon><t-icon name="delete" /></template>
+                  </t-button>
+                </t-tooltip>
+              </t-popconfirm>
             </div>
           </button>
 
@@ -565,7 +585,7 @@
 <script setup lang="ts">
 import { ref, onMounted, watch, onUnmounted, computed } from 'vue';
 import { useI18n } from 'vue-i18n';
-import { DialogPlugin, MessagePlugin } from 'tdesign-vue-next';
+import { MessagePlugin } from 'tdesign-vue-next';
 import {
   listIMChannels, createIMChannel, updateIMChannel, deleteIMChannel, toggleIMChannel,
   getWeChatQRCode, pollWeChatQRCodeStatus, listAllIMChannels, listAgents,
@@ -703,7 +723,6 @@ const channelMenuOptions = (channel: IMChannel | IMChannelOverview) => ([
     content: channel.enabled ? t('common.off') : t('common.on'),
     value: 'toggle',
   },
-  { content: t('common.delete'), value: 'delete', theme: 'error' as const },
 ]);
 
 function handleChannelMenuClick(
@@ -712,10 +731,6 @@ function handleChannelMenuClick(
 ) {
   if (data.value === 'toggle') {
     void handleToggle(channel);
-    return;
-  }
-  if (data.value === 'delete') {
-    confirmDelete(channel.id);
   }
 }
 
@@ -935,20 +950,6 @@ function openDrawer(channel: IMChannel | IMChannelOverview) {
   void editChannel(channel);
 }
 
-function confirmDelete(id: string) {
-  const dialog = DialogPlugin.confirm({
-    header: t('common.delete'),
-    body: t('agentEditor.im.deleteConfirm'),
-    confirmBtn: { content: t('common.delete'), theme: 'danger' },
-    cancelBtn: t('common.cancel'),
-    onConfirm: async () => {
-      dialog.destroy();
-      await handleDelete(id);
-    },
-    onClose: () => dialog.destroy(),
-  });
-}
-
 async function editChannel(channel: IMChannel | IMChannelOverview) {
   wizardStep.value = 0;
   let fullChannel: IMChannel | null = null;

frontend/src/components/css/channel-panel-list.less

@@ -41,6 +41,8 @@
   gap: 12px;
   height: 100%;
   box-sizing: border-box;
+  // Match two-line body (title + agent name) so the add card aligns with existing channels.
+  min-height: calc(20px + 14px * 1.4 + 4px + 12px * 1.4);
   padding: 10px 12px;
   border: 1px solid var(--td-component-stroke);
   border-radius: 10px;
@@ -54,6 +56,12 @@
     cursor: pointer;
     width: 100%;
 
+    .channel-card__actions:not(.channel-card__actions--spacer) {
+      opacity: 0;
+      pointer-events: none;
+      transition: opacity 0.15s ease;
+    }
+
     &:hover,
     &:focus-visible {
       border-color: var(--td-brand-color-3, var(--td-brand-color));
@@ -61,12 +69,25 @@
       outline: none;
     }
 
+    &:hover .channel-card__actions:not(.channel-card__actions--spacer),
+    &:focus-within .channel-card__actions:not(.channel-card__actions--spacer) {
+      opacity: 1;
+      pointer-events: auto;
+    }
+
     &:focus-visible {
       outline: 2px solid var(--td-brand-color);
       outline-offset: 2px;
     }
   }
 
+  @media (hover: none) {
+    &--clickable .channel-card__actions:not(.channel-card__actions--spacer) {
+      opacity: 1;
+      pointer-events: auto;
+    }
+  }
+
   &--add {
     align-items: center;
     justify-content: flex-start;
@@ -160,16 +181,18 @@
     margin-left: auto;
 
     &--spacer {
-      width: 24px;
+      width: 52px;
       height: 24px;
     }
   }
 
-  &__more {
+  &__action-btn {
     flex-shrink: 0;
     padding: 2px;
+  }
+
+  &__more {
     color: var(--td-text-color-placeholder);
-    transition: color 0.15s ease, background 0.15s ease;
 
     &:hover,
     &:focus-visible {
@@ -177,6 +200,16 @@
       color: var(--td-text-color-primary);
     }
   }
+
+  &__delete {
+    color: var(--td-error-color);
+
+    &:hover,
+    &:focus-visible {
+      background: color-mix(in srgb, var(--td-error-color) 12%, transparent);
+      color: var(--td-error-color);
+    }
+  }
 }
 
 .agent-field-row {