Method _clearPluginData

src/main/api/shared/database.ts:638–717

* 清空指定插件的所有数据（供内部调用）

(
    pluginName: string
  )

   * 清空指定插件的所有数据（供内部调用）
   */
  private async _clearPluginData(
    pluginName: string
  ): Promise<{ success: boolean; deletedCount?: number; error?: string }> {
    try {
      const target = this.resolvePluginDataTarget(pluginName)
      if (!target) {
        return { success: false, error: '插件标识无效' }
      }
      if (target.isHostData) {
        return { success: false, error: '主程序数据不支持通过该接口清空' }
      }

      const prefix = target.prefix
      const allDocs = lmdbInstance.allDocs(prefix)

      let deletedCount = 0

      // 1. 删除主数据库和元数据库的文档
      for (const doc of allDocs) {
        const result = lmdbInstance.remove(doc._id)
        if (result.ok) {
          deletedCount++
        }
      }

      // 2. 清理可能残留的元数据（主数据已删除但 meta 还在的情况）
      const metaDb = lmdbInstance.getMetaDb()
      const metaKeysToDelete: string[] = []
      for (const { key } of metaDb.getRange({
        start: prefix,
        end: this.getNextPrefix(prefix)
      })) {
        if (key.startsWith(prefix)) {
          metaKeysToDelete.push(key)
        }
      }

      for (const key of metaKeysToDelete) {
        metaDb.removeSync(key)
      }

      // 3. 删除附件数据库的附件和元数据
      const attachmentDb = lmdbInstance.getAttachmentDb()
      const attachmentPrefix = `attachment:${prefix}`
      const metadataPrefix = `attachment-ext:${prefix}`

      const attachmentKeysToDelete: string[] = []
      for (const { key } of attachmentDb.getRange({
        start: attachmentPrefix,
        end: this.getNextPrefix(attachmentPrefix)
      })) {
        if (key.startsWith(attachmentPrefix)) {
          attachmentKeysToDelete.push(key)
        }
      }

      const metadataKeysToDelete: string[] = []
      for (const { key } of attachmentDb.getRange({