fix：优化项目加载

build.js

@@ -2,6 +2,7 @@
 /**
  * 将静态资源复制到 dist/，便于直接部署到任意静态主机。
  * 产出: dist/index.html, dist/config.json, dist/lib/, dist/image/
+ * 构建时注入 __CACHE_VERSION__ 为时间戳，用于防微信/浏览器强缓存，保证发版后页面可更新。
  */
 const fs = require('fs');
 const path = require('path');
@@ -56,7 +57,11 @@ function main() {
   }
   fs.mkdirSync(DIST, { recursive: true });
 
-  copyFile(path.join(ROOT, 'index.html'), path.join(DIST, 'index.html'));
+  const cacheVersion = String(Date.now());
+  let indexHtml = fs.readFileSync(path.join(ROOT, 'index.html'), 'utf8');
+  indexHtml = indexHtml.replace(/__CACHE_VERSION__/g, cacheVersion);
+  fs.writeFileSync(path.join(DIST, 'index.html'), indexHtml, 'utf8');
+
   copyFile(path.join(ROOT, 'config.json'), path.join(DIST, 'config.json'));
   copyFile(path.join(ROOT, 'api.config.json'), path.join(DIST, 'api.config.json'));
   copyDir(path.join(ROOT, 'lib'), path.join(DIST, 'lib'));

index.html

@@ -4,8 +4,12 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
   <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
+  <meta http-equiv="Pragma" content="no-cache">
+  <meta http-equiv="Expires" content="0">
   <title>全景查看</title>
-  <link rel="stylesheet" href="lib/pannellum.css">
+  <script>window.__CACHE_VERSION__='__CACHE_VERSION__';</script>
+  <link rel="stylesheet" href="lib/pannellum.css?v=__CACHE_VERSION__">
   <style>
     html, body { margin: 0; padding: 0; width: 100%; height: 100%; overflow: hidden; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
     .pano-root { flex: 1 1 0%; position: relative; width: 100%; height: 100%; }
@@ -207,7 +211,7 @@
     </div>
   </div>
 
-  <script src="lib/pannellum.js"></script>
+  <script src="lib/pannellum.js?v=__CACHE_VERSION__"></script>
   <script>
     (function() {
       var API = '/api';
@@ -443,7 +447,7 @@
 
       function loadFromConfig(cb) {
         var xhr = new XMLHttpRequest();
-        xhr.open('GET', 'config.json', true);
+        xhr.open('GET', 'config.json?v=' + (window.__CACHE_VERSION__ || ''), true);
         xhr.onload = function() {
           if (xhr.status !== 200) { if (cb) cb(null); return; }
           var config;
@@ -479,7 +483,7 @@
         });
       }
 
-      fetch('api.config.json')
+      fetch('api.config.json?v=' + (window.__CACHE_VERSION__ || ''))
         .then(function(r) {
           if (!r.ok) return Promise.resolve({ apiBase: '' });
           return typeof r.json === 'function' ? r.json().catch(function() { return { apiBase: '' }; }) : Promise.resolve({ apiBase: '' });