feat: 添加补丁版本基础版本选择功能

- 添加基础版本下拉选择器，仅在补丁更新类型时显示
- 添加应用和更新类型的 watch 监听，自动获取全量版本列表
- 提交时传递 base_version_id 参数
- 添加调试日志便于排查问题

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/plugins/i18n/en.json

@@ -1502,8 +1502,8 @@
         "updateMethod": "Update Method",
         "baseVersion": "Base Version",
         "baseVersionPlaceholder": "Select base version (patch mode)",
-        "baseVersionDesc": "Select a base version to only upload changed files for incremental patch update",
-        "noBaseVersion": "None (Full version)",
+        "baseVersionDesc": "Select a full version as the base for this patch. The patch will be generated based on this version",
+        "noBaseVersion": "No full version available. Please create a full version first",
         "status": "Status",
         "autoUpdate": "Auto Update",
         "autoUpdateDesc": "When enabled, the application will automatically download and install updates",

frontend/src/plugins/i18n/zh.json

@@ -1480,8 +1480,8 @@
         "updateMethod": "更新方式",
         "baseVersion": "基础版本",
         "baseVersionPlaceholder": "选择基础版本（补丁模式）",
-        "baseVersionDesc": "选择基础版本后，只会上传变更的文件，用于增量补丁更新",
-        "noBaseVersion": "无（完整版本）",
+        "baseVersionDesc": "选择一个全量版本作为此补丁包的基础，补丁将基于此版本生成",
+        "noBaseVersion": "没有可用的全量版本，请先创建全量版本",
         "status": "状态",
         "autoUpdate": "自动更新",
         "autoUpdateDesc": "启用后应用将自动下载并安装更新",