Problem

Previously, developers needed to make two separate API calls to get both group information and the group avatar URL:

const bot = getBot(group.botId)!
const groupInfo = await bot.getGroupInfo(group.id)        // First call
const groupAvatarUrl = await bot.getGroupAvatarUrl(group.id)  // Second call

This resulted in unnecessary code duplication and extra async operations.

Solution

Added an optional avatar field to the GroupInfo interface that automatically includes the group avatar URL when retrieving group information:

const bot = getBot(group.botId)!
const groupInfo = await bot.getGroupInfo(group.id)
// groupInfo.avatar now contains the avatar URL - no second call needed!

Changes

1. Updated GroupInfo Interface

Added optional avatar?: string field to packages/core/src/types/adapter/apiResponse.ts:

export interface GroupInfo {
  groupId: string
  groupName?: string
  // ... other fields ...
  avatar?: string  // NEW: Group avatar URL
}

2. Updated getGroupInfo Method

Modified packages/core/src/adapter/onebot/core/core.ts to automatically fetch and include the avatar URL:

async getGroupInfo(groupId: string, noCache?: boolean) {
  const info = await this._onebot.getGroupInfo(Number(groupId), noCache)
  const avatar = await this.getGroupAvatarUrl(groupId)  // Fetch avatar URL
  return {
    // ... other fields ...
    avatar,  // Include in response
  }
}

3. Updated getGroupList Method

Also updated getGroupList to include avatar URLs for consistency across the API.

Benefits

• ✅ Reduced API calls: Single call instead of two separate async operations
• ✅ Better DX: More intuitive and convenient API
• ✅ Backward compatible: The field is optional, existing code continues to work
• ✅ Consistent: Both getGroupInfo and getGroupList now include avatar information

Closes #[issue_number]

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