清理项目冗余文件与死代码

删除内容：
- config.py：旧架构配置残留，已被 core/config.py 替代
- README_SOCKS.md：内容严重过时（引用已删除的 api_server.py 和测试脚本），功能说明已合并至 README
- frontend/src/api/types.js：纯 JSDoc typedef，未被任何模块引用，属于死文档
- frontend/src/assets/vue.svg：默认模板资源，项目中无任何页面引用
- frontend/src/utils/clipboard.js：移除 copyTextFallback 函数（使用已废弃的 document.execCommand）

frontend/src/api/types.js

@@ -1,57 +0,0 @@
-/**
- * @typedef {object} ApiResponse<T>
- * @property {number} code
- * @property {string} message
- * @property {T} data
- */
-
-/**
- * @typedef {object} StatsData
- * @property {number} total
- * @property {number} available
- * @property {number} today_new
- * @property {number} avg_score
- * @property {number} http_count
- * @property {number} https_count
- * @property {number} socks4_count
- * @property {number} socks5_count
- */
-
-/**
- * @typedef {object} Proxy
- * @property {string} ip
- * @property {number} port
- * @property {string} protocol
- * @property {number} score
- * @property {string} last_check
- */
-
-/**
- * @typedef {object} ProxyListData
- * @property {Proxy[]} list
- * @property {number} total
- */
-
-/**
- * @typedef {object} Plugin
- * @property {string|number} id
- * @property {string} name
- * @property {string} description
- * @property {boolean} enabled
- * @property {number} success_count
- * @property {number} failure_count
- * @property {string|null} last_run
- */
-
-/**
- * @typedef {object} SettingsData
- * @property {string} db_path
- * @property {number} crawl_timeout
- * @property {number} validation_timeout
- * @property {number} max_retries
- * @property {number} default_concurrency
- * @property {number} min_proxy_score
- * @property {number} proxy_expiry_days
- */
-
-export {}

frontend/src/assets/vue.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="37.07" height="36" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 198"><path fill="#41B883" d="M204.8 0H256L128 220.8L0 0h97.92L128 51.2L157.44 0h47.36Z"></path><path fill="#41B883" d="m0 0l128 220.8L256 0h-51.2L128 132.48L50.56 0H0Z"></path><path fill="#35495E" d="M50.56 0L128 133.12L204.8 0h-47.36L128 51.2L97.92 0H50.56Z"></path></svg>

frontend/src/utils/clipboard.js

@@ -39,25 +39,3 @@ export async function copyProxy(proxy) {
   return copyToClipboard(text)
 }
 
-/**
- * 复制文本（备选方案：使用 DOM）
- * @param {string} text
- * @returns {boolean}
- */
-export function copyTextFallback(text) {
-  const textarea = document.createElement('textarea')
-  textarea.value = text
-  textarea.style.cssText = 'position:fixed;left:-9999px;opacity:0;'
-  document.body.appendChild(textarea)
-  
-  try {
-    textarea.select()
-    textarea.setSelectionRange(0, text.length)
-    const success = document.execCommand('copy')
-    document.body.removeChild(textarea)
-    return success
-  } catch {
-    document.body.removeChild(textarea)
-    return false
-  }
-}