diff --git a/mateclaw-ui/src/components/channels/ChannelEditModal.vue b/mateclaw-ui/src/components/channels/ChannelEditModal.vue
index 26d17cbc..03b24d54 100644
--- a/mateclaw-ui/src/components/channels/ChannelEditModal.vue
+++ b/mateclaw-ui/src/components/channels/ChannelEditModal.vue
@@ -424,6 +424,7 @@ import { ref, computed, onMounted } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { ElMessage } from 'element-plus'
 import { CHANNEL_FIELD_DEFS } from '@/types'
+import { copyToClipboard } from '@/utils/clipboard'
 import type { Agent, Channel, ChannelFieldDef } from '@/types'
 import {
   buildConfigJson,
@@ -629,7 +630,7 @@ const copyLabel = ref(t('channels.webhook.copy'))
 
 async function copyWebhookUrl() {
   try {
-    await navigator.clipboard.writeText(webhookUrl.value)
+    await copyToClipboard(webhookUrl.value)
     copyLabel.value = t('channels.webhook.copied')
     setTimeout(() => { copyLabel.value = t('channels.webhook.copy') }, 2000)
   } catch {
@@ -639,7 +640,7 @@ async function copyWebhookUrl() {
 
 async function copyText(text: string) {
   try {
-    await navigator.clipboard.writeText(text)
+    await copyToClipboard(text)
     ElMessage.success(t('common.copied'))
   } catch {
     ElMessage.warning(t('channels.webhook.copyFailed'))
diff --git a/mateclaw-ui/src/components/chat/MessageBubble.vue b/mateclaw-ui/src/components/chat/MessageBubble.vue
index 2586c036..3647a396 100644
--- a/mateclaw-ui/src/components/chat/MessageBubble.vue
+++ b/mateclaw-ui/src/components/chat/MessageBubble.vue
@@ -366,6 +366,7 @@ import { useMarkdownRenderer } from '@/composables/useMarkdownRenderer'
 import { useAuthenticatedAttachment } from '@/composables/useAuthenticatedAttachment'
 import { useToolLabel } from '@/composables/useToolLabel'
 import { http } from '@/api'
+import { copyToClipboard } from '@/utils/clipboard'
 import TypingCursor from './TypingCursor.vue'
 import BrowserTimeline from './BrowserTimeline.vue'
 import ToolCallSegment from './ToolCallSegment.vue'
@@ -563,7 +564,7 @@ let copyTimer: ReturnType<typeof setTimeout> | null = null
 function copyMessage() {
   const text = displayContent.value || props.message.content || ''
   if (!text) return
-  navigator.clipboard.writeText(text).then(() => {
+  copyToClipboard(text).then(() => {
     copyState.value = 'copied'
     if (copyTimer) clearTimeout(copyTimer)
     copyTimer = setTimeout(() => { copyState.value = 'idle' }, 2000)
diff --git a/mateclaw-ui/src/utils/clipboard.ts b/mateclaw-ui/src/utils/clipboard.ts
new file mode 100644
index 00000000..c1c881cf
--- /dev/null
+++ b/mateclaw-ui/src/utils/clipboard.ts
@@ -0,0 +1,18 @@
+/**
+ * Copy text to clipboard with fallback for non-HTTPS contexts
+ * where navigator.clipboard is undefined.
+ */
+export async function copyToClipboard(text: string): Promise<void> {
+  if (navigator.clipboard) {
+    return navigator.clipboard.writeText(text)
+  }
+  // Fallback: textarea + execCommand('copy')
+  const ta = document.createElement('textarea')
+  ta.value = text
+  ta.style.position = 'fixed'
+  ta.style.left = '-9999px'
+  document.body.appendChild(ta)
+  ta.select()
+  document.execCommand('copy')
+  document.body.removeChild(ta)
+}
diff --git a/mateclaw-ui/src/views/AgentContext.vue b/mateclaw-ui/src/views/AgentContext.vue
index 830cfed6..d69dac7c 100644
--- a/mateclaw-ui/src/views/AgentContext.vue
+++ b/mateclaw-ui/src/views/AgentContext.vue
@@ -208,6 +208,7 @@ import { useI18n } from 'vue-i18n'
 import { ElMessage } from 'element-plus'
 import { mcConfirm } from '@/components/common/useConfirm'
 import { agentApi, agentContextApi } from '@/api/index'
+import { copyToClipboard } from '@/utils/clipboard'
 import type { Agent, WorkspaceFile } from '@/types/index'
 import { useMarkdownRenderer } from '@/composables/useMarkdownRenderer'
 import { plainTextIcon } from '@/composables/usePixelarticons'
@@ -330,7 +331,7 @@ function handlePreviewClick(e: MouseEvent) {
   const encoded = btn.getAttribute('data-code')
   if (!encoded) return
   const code = decodeURIComponent(encoded)
-  navigator.clipboard.writeText(code).then(() => {
+  copyToClipboard(code).then(() => {
     btn.classList.add('copied')
     const textEl = btn.querySelector('.code-block__copy-text')
     if (textEl) textEl.textContent = t('chat.copied') || 'Copied'
diff --git a/mateclaw-ui/src/views/ChatConsole.vue b/mateclaw-ui/src/views/ChatConsole.vue
index ef5dc920..65ae2387 100644
--- a/mateclaw-ui/src/views/ChatConsole.vue
+++ b/mateclaw-ui/src/views/ChatConsole.vue
@@ -317,6 +317,7 @@ import { mcConfirm } from '@/components/common/useConfirm'
 import { ChatDotRound, Delete, Plus, Setting, UploadFilled } from '@element-plus/icons-vue'
 import { conversationApi, agentApi, modelApi, chatApi, cronJobApi } from '@/api/index'
 import { channelIconUrl } from '@/utils/channelSource'
+import { copyToClipboard } from '@/utils/clipboard'
 import { useChat } from '@/composables/chat/useChat'
 import { reconstructErrorInfo } from '@/types/chatError'
 import { reconcileMessages, extractMessages } from '@/utils/messageReconcile'
@@ -1741,7 +1742,7 @@ function handleCodeCopy(e: MouseEvent) {
   const encoded = btn.getAttribute('data-code')
   if (!encoded) return
   const code = decodeURIComponent(encoded)
-  navigator.clipboard.writeText(code).then(() => {
+  copyToClipboard(code).then(() => {
     btn.classList.add('copied')
     const textEl = btn.querySelector('.code-block__copy-text')
     if (textEl) textEl.textContent = t('chat.copied')
diff --git a/mateclaw-ui/src/views/Settings/Models/modals/DeviceCodeDialog.vue b/mateclaw-ui/src/views/Settings/Models/modals/DeviceCodeDialog.vue
index 0b5e8319..6e38057f 100644
--- a/mateclaw-ui/src/views/Settings/Models/modals/DeviceCodeDialog.vue
+++ b/mateclaw-ui/src/views/Settings/Models/modals/DeviceCodeDialog.vue
@@ -41,6 +41,7 @@
 import { computed, onBeforeUnmount, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { ElMessage } from 'element-plus'
+import { copyToClipboard } from '@/utils/clipboard'
 
 const props = defineProps<{
   visible: boolean
@@ -83,7 +84,7 @@ onBeforeUnmount(() => {
 
 async function copyCode() {
   try {
-    await navigator.clipboard.writeText(props.userCode)
+    await copyToClipboard(props.userCode)
     copied.value = true
     setTimeout(() => { copied.value = false }, 2000)
   } catch {