feat: remote control 支持 auto bind 功能 (#300)

* feat: acp-link 支持 --group 参数指定 channel group

- 添加 --group CLI flag，校验格式 [a-zA-Z0-9_-]+
- 支持 ACP_RCS_GROUP 环境变量 fallback
- 传递 channelGroupId 到 RcsUpstreamClient
- 更新 README 文档说明 --group 和相关环境变量

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: RCS 后端 session 复用与 group 绑定

- storeFindEnvironmentByMachineName 匹配 offline 状态，防止重连创建重复 session
- registerEnvironment 复用已有 session 而非每次新建
- EnvironmentResponse 返回 channel_group_id 字段
- 注册时将 session 绑定到 group ID，支持 web UI 按 group 查询
- apiKeyAuth 不再设置 uuid，由 uuidAuth 统一处理

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: Web UI Token Manager — 多 token 切换与 session 隔离

- 新增 useTokens hook 管理 localStorage token CRUD
- 新增 TokenManagerDialog 弹窗组件（添加/编辑/删除/切换 token）
- api client 支持Bearer token 认证，UUID 跟随 token 变化
- Navbar 添加 token 切换按钮
- 切换 token 时自动 reload，实现 session 数据隔离

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: 修复 useTokens useState 初始化函数签名错误

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/remote-control-server/src/services/environment.ts

@@ -6,6 +6,7 @@ import {
   storeUpdateEnvironment,
   storeListActiveEnvironments,
   storeListActiveEnvironmentsByUsername,
+  storeListSessionsByEnvironment,
 } from "../store";
 import type { RegisterEnvironmentRequest, EnvironmentResponse } from "../types/api";
 import type { EnvironmentRecord } from "../store";
@@ -20,6 +21,7 @@ function toResponse(row: EnvironmentRecord): EnvironmentResponse {
     username: row.username,
     last_poll_at: row.lastPollAt ? row.lastPollAt.getTime() / 1000 : null,
     worker_type: row.workerType,
+    channel_group_id: row.bridgeId,
     capabilities: row.capabilities,
   };
 }
@@ -41,14 +43,19 @@ export function registerEnvironment(req: RegisterEnvironmentRequest & { metadata
   });
 
   let sessionId: string | undefined;
-  // ACP agents: auto-create a session so they appear in the dashboard sessions list
+  // ACP agents: reuse existing session or create one
   if (workerType === "acp") {
-    const session = storeCreateSession({
-      environmentId: record.id,
-      title: req.machine_name || "ACP Agent",
-      source: "acp",
-    });
-    sessionId = session.id;
+    const existing = storeListSessionsByEnvironment(record.id);
+    if (existing.length > 0) {
+      sessionId = existing[0].id;
+    } else {
+      const session = storeCreateSession({
+        environmentId: record.id,
+        title: req.machine_name || "ACP Agent",
+        source: "acp",
+      });
+      sessionId = session.id;
+    }
   }
 
   return { environment_id: record.id, environment_secret: record.secret, status: record.status as "active", session_id: sessionId };