feat: 统一管理端弹窗与内容区交互样式

- 收敛管理端公共 Modal 链路，新增表单弹窗与普通内容弹窗包装\n- 迁移 Bot、知识库、插件、工作流、资源、MCP、数据中枢与系统管理页面级弹窗\n- 统一内容区工具栏、列表容器、导航与顶部按钮的视觉密度和交互节奏

easyflow-ui-admin/app/src/locales/langs/en-US/bot.json

@@ -45,6 +45,25 @@
   "publicChatCopySuccess": "Copied",
   "publicChatCopyFail": "Copy failed",
   "basicInfo": "Basic Info",
+  "modal": {
+    "createDescription": "Set the assistant appearance, identity and base availability.",
+    "editDescription": "Update the assistant presentation and base availability.",
+    "previewEyebrow": "Assistant Preview",
+    "previewTitleFallback": "Untitled Assistant",
+    "previewAliasFallback": "The alias will appear here after it is filled in",
+    "previewDescriptionFallback": "Describe the tasks this assistant is good at in one sentence.",
+    "previewStatusEnabled": "Enabled",
+    "previewStatusDisabled": "Disabled",
+    "sectionAppearanceTitle": "Basic Info",
+    "sectionAppearanceDescription": "Define the avatar, name and category.",
+    "sectionIdentityTitle": "Identity",
+    "sectionIdentityDescription": "Configure a stable alias and an external description.",
+    "sectionPublishTitle": "Availability",
+    "sectionPublishDescription": "Control whether the assistant is currently available.",
+    "aliasHint": "Use letters, numbers or hyphens for a stable access identifier.",
+    "descriptionHint": "This summary helps teammates understand when to use the assistant.",
+    "statusHint": "When disabled, the assistant configuration is kept but shown as inactive."
+  },
   "placeholder": {
     "welcome": "Please enter welcome message",
     "prompt": "You are an AI assistant. Please provide clear and accurate answers based on the user's questions.",