refactor: 移除未使用的依赖和功能，优化代码结构

移除sharp模块及相关缩略图功能
删除webpack配置文件和安装脚本
清理未使用的依赖项
重构PHP服务端代码，优化缓存处理逻辑

source.js

@@ -5,11 +5,10 @@ const querystring = require('querystring');
 const fs = require('fs');
 const pathModule = require('path');
 const crypto = require('crypto');
-const sharp = require('sharp');
 
 const CACHE_DIR_NAME = '.cache';
 const DEFAULT_PORT = 9001;
-const DEFAULT_API_ENDPOINT = 'http://183.6.121.121:9521/alist';
+const DEFAULT_API_ENDPOINT = 'http://183.6.121.121:9519/api';
 
 const cacheDir = pathModule.join(__dirname, CACHE_DIR_NAME);
 const pathIndex = {};
@@ -375,23 +374,6 @@ async function fetchApiData(reqPath, token, sign) {
     });
 }
 
-// createThumbnail
-function createThumbnail(data, cacheContentFile) {
-    const { path, thumb } = data;
-
-    const thumbCacheFile = pathModule.join(cacheDir, `thumb_${thumb.uniqid}.jpeg`);
-    if (fs.existsSync(thumbCacheFile)) return thumbCacheFile;
-
-    const isVideo = path && typeof path === 'string' && path.includes('.mp4');
-    if (isVideo || !thumb) return;
-    const width = thumb.width && thumb.width > 0 ? thumb.width : undefined;
-    const height = thumb.height && thumb.height > 0 ? thumb.height : undefined;
-    if (!width) return;
-    sharp(cacheContentFile).resize(width, height).toFile(thumbCacheFile);
-    return thumbCacheFile;
-}
-
-
 // 从真实 URL 获取数据并写入缓存
 const REAL_URL_FETCH_TIMEOUT_MS = 0; // 0 means no timeout for the actual file download
 
@@ -457,10 +439,6 @@ const fetchAndServe = (data, tempCacheContentFile, cacheContentFile, cacheMetaFi
                         fs.renameSync(tempCacheContentFile, cacheContentFile);
                         console.log(`Successfully cached: ${cacheContentFile}`);
 
-                        // 生成缩略图
-                        if (data.thumb) {
-                            createThumbnail(data, cacheContentFile);
-                        }
                     } catch (renameError) {
                         console.error(`Error renaming temp cache file ${tempCacheContentFile} to ${cacheContentFile}:`, renameError);
                         // If rename fails, try to remove the temp file to avoid clutter
@@ -505,22 +483,6 @@ function serveFromCache(cacheData, cacheContentFile, cacheMetaFile, res) {
         'Date': new Date().toUTCString(),
         'Last-Modified': (cacheData.headers && cacheData.headers['last-modified']) || new Date(fs.statSync(cacheMetaFile).mtime).toUTCString(),
     };
-    if (cacheData.thumb) {
-        var thumbCacheFile = createThumbnail(cacheData, cacheContentFile)
-        if (thumbCacheFile && fs.existsSync(thumbCacheFile)) {
-            cacheData.headers['content-length'] = fs.statSync(thumbCacheFile).size;
-            const responseHeaders = {
-                ...baseHeaders,
-                ...(cacheData.headers || {}),
-                'ETag': (cacheData.thumb.uniqid || cacheData.uniqid) + '_thumb',
-                'Content-Type': 'image/jpeg',
-            };
-            res.writeHead(HTTP_STATUS.OK, responseHeaders);
-            const thumbStream = fs.createReadStream(thumbCacheFile);
-            thumbStream.pipe(res);
-            return;
-        }
-    }
 
     viewsInfo.increment('cacheCall');
     const readStream = fs.createReadStream(cacheContentFile);