refactor(channels): make built-in channels self-contained (#4908)

* refactor(channels): own setup and instance contracts

* refactor(channels): isolate management contracts

* refactor(channels): normalize activation contracts

* fix(channels): enforce management contracts

* refactor(channels): finish setup ownership migration

* fix(channels): harden management contracts

* fix(channels): enforce lazy loading and runtime ownership

* fix(feishu): make multi-instance startup idempotent

* fix(webui): render channel setup contracts cleanly

* fix(feishu): stop websocket clients cleanly

* fix(channels): enforce persistence and activation gates

* fix(channels): preserve global feature action scope

* fix(channels): apply defaults for single plugins

* fix(channels): enforce management contract boundaries

* refactor(feishu): remove identity helper indirection

* fix(channels): preserve management setup contracts

* refactor(channels): generalize instance settings UI

* refactor(channels): package channel plugins with web UI metadata

* refactor(channels): make built-ins self-contained packages

* test(channels): colocate tests with channel packages

* fix(dingtalk): use official brand icon

* feat(channels): colocate webui translations

* docs(channels): clarify plugin ownership

* test(exec): remove output wait race

* refactor(channels): unify plugin descriptors

* fix(channels): enforce descriptor-owned contracts

* refactor(channels): finish package-owned plugin setup

* refactor(channels): use repository-owned packages only

* fix(channels): self-describe dependencies and runtime state

* fix(channels): warn about legacy entry points

webui/src/i18n/locales/zh-CN/common.json

@@ -510,7 +510,7 @@
     },
     "channels": {
       "description": "把聊天应用、邮箱和 WebUI 连接到 nanobot。",
-      "caption": "{{enabled}} 个已启用 · 共 {{total}} 个渠道",
+      "caption": "{{enabled}} 个运行中 · 共 {{total}} 个渠道",
       "searchPlaceholder": "搜索渠道",
       "backToChannels": "所有渠道",
       "catalog": "渠道",
@@ -527,13 +527,51 @@
       "needsConfig": "需要配置",
       "connect": "连接",
       "reconnect": "重新连接",
-      "feishuQrAlt": "飞书连接二维码",
-      "feishuScanTitle": "使用飞书扫码",
-      "feishuScanDescription": "用手机上的飞书或 Lark 扫描二维码。授权完成后，nanobot 会自动完成配置。",
-      "feishuWaiting": "正在等待授权...",
-      "feishuConnected": "飞书已连接。",
-      "feishuConnectStopped": "连接已停止。",
-      "feishuConnecting": "正在连接..."
+      "advanced": "高级",
+      "checkAndEnable": "检查并启用",
+      "checkConnection": "检查连接",
+      "checkedAndEnabled": "已检查并启用。",
+      "checking": "正在检查...",
+      "checkOnly": "仅检查",
+      "commandCopied": "命令已复制。",
+      "commandCopyFailed": "无法复制命令。",
+      "configuredInstances": "已配置 {{count}} 个实例",
+      "connectPreview": "下一步将在浏览器内连接。目前请先运行下方命令。",
+      "copyCommand": "复制命令",
+      "filterAll": "全部",
+      "filterOff": "未运行",
+      "filterOn": "运行中",
+      "helperCopied": "已复制 {{name}}。",
+      "helperCopyFailed": "无法复制 {{name}}。",
+      "hideSecret": "隐藏密钥",
+      "instanceConfigured": "已配置",
+      "instanceNeedsSetup": "需要配置",
+      "runtimeFailed": "启动失败",
+      "runtimeStarting": "正在启动",
+      "runtimeStopped": "未运行",
+      "managedByWebui": "由 WebUI 管理",
+      "officialGuide": "官方指南",
+      "optional": "可选",
+      "providerPreset": "服务商",
+      "requiredSetup": "必需配置",
+      "savedSecret": "已保存",
+      "savedSecretPlaceholder": "已保存的密钥",
+      "savedSettings": "设置已保存。",
+      "saveSettings": "保存设置",
+      "selectChannel": "查看 {{name}} 设置",
+      "setupSteps": "后续步骤",
+      "showSecret": "显示密钥",
+      "toggleChannel": "{{name}} 渠道",
+      "toggleInstance": "{{name}} 实例",
+      "tryIt": "试一试",
+      "validationFailed": "启用前请检查必需配置。",
+      "validation": {
+        "connected": "已连接",
+        "configured": "手动配置",
+        "needs_setup": "需要配置",
+        "invalid": "无效",
+        "unsupported": "手动配置"
+      }
     },
     "nanobotFeatures": {
       "enabled": "已启用",