feat: Add webhook push functionality for bot message events (#1768)

* Initial plan

* Backend: Add webhook persistence model, service, API endpoints and message push functionality

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Frontend: Rename API Keys to API Integration, add webhook management UI with tabs

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* Fix frontend linting issues and formatting

Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>

* chore: perf ui in api integration dialog

* perf: webhook data pack structure

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RockChinQ <45992437+RockChinQ@users.noreply.github.com>
Co-authored-by: Junyan Qin <rockchinq@gmail.com>

web/src/i18n/locales/en-US.ts

@@ -59,7 +59,9 @@ const enUS = {
     changePasswordSuccess: 'Password changed successfully',
     changePasswordFailed:
       'Failed to change password, please check your current password',
+    apiIntegration: 'API Integration',
     apiKeys: 'API Keys',
+    manageApiIntegration: 'Manage API Integration',
     manageApiKeys: 'Manage API Keys',
     createApiKey: 'Create API Key',
     apiKeyName: 'API Key Name',
@@ -74,6 +76,20 @@ const enUS = {
     noApiKeys: 'No API keys configured',
     apiKeyHint:
       'API keys allow external systems to access LangBot Service APIs',
+    webhooks: 'Webhooks',
+    createWebhook: 'Create Webhook',
+    webhookName: 'Webhook Name',
+    webhookUrl: 'Webhook URL',
+    webhookDescription: 'Webhook Description',
+    webhookEnabled: 'Enabled',
+    webhookCreated: 'Webhook created successfully',
+    webhookDeleted: 'Webhook deleted successfully',
+    webhookDeleteConfirm: 'Are you sure you want to delete this webhook?',
+    webhookNameRequired: 'Webhook name is required',
+    webhookUrlRequired: 'Webhook URL is required',
+    noWebhooks: 'No webhooks configured',
+    webhookHint:
+      'Webhooks allow LangBot to push person and group message events to external systems',
     actions: 'Actions',
     apiKeyCreatedMessage: 'Please copy this API key.',
   },