chore: bump to 1.5.15, publish full package + hot update

- 版本号 1.5.14 → 1.5.15
- 新增 scripts/publish-full.js：一键上传完整包到 latest 与 v<version> release
- 清理未引用的 session_sync_enhanced.js 与临时 test-sync.js

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "codex-market",
-  "version": "1.5.14",
+  "version": "1.5.15",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "codex-market",
-      "version": "1.5.14",
+      "version": "1.5.15",
       "license": "MIT",
       "dependencies": {
         "electron-updater": "^6.8.9",