feat(cli): 强制使用用户现有浏览器并移除 profile/channel

- 禁用 --profile/AGENT_BROWSER_PROFILE 与 --channel/AGENT_BROWSER_CHANNEL，并给出项目策略提示

- 默认模式强制连接 localhost:9333，连接失败直接报错，不再自动回退新开浏览器

- 同步更新 README、技能文档、docs 与 --help 输出

- 版本升级到 0.14.0-fork.2 并同步 cli/Cargo.toml 与 Cargo.lock

docs/src/app/sessions/page.mdx

@@ -34,29 +34,6 @@ Each session has its own:
 - Navigation history
 - Authentication state
 
-## Persistent profiles
-
-By default, browser state is lost when the browser closes. Use `--profile` to persist state across restarts:
-
-```bash
-# Use a persistent profile directory
-agent-browser --profile ~/.myapp-profile open myapp.com
-
-# Login once, then reuse the authenticated session
-agent-browser --profile ~/.myapp-profile open myapp.com/dashboard
-
-# Or via environment variable
-AGENT_BROWSER_PROFILE=~/.myapp-profile agent-browser open myapp.com
-```
-
-The profile directory stores:
-
-- Cookies and localStorage
-- IndexedDB data
-- Service workers
-- Browser cache
-- Login sessions
-
 ## Session persistence
 
 Use `--session-name` to automatically save and restore cookies and localStorage across browser restarts: