feat(gemini): 支持 Agentic 视频理解

[CookSleep]

变更内容

• 为 Gemini 兼容模型新增可选的 Agentic 视频理解请求参数，并兼容蛇形与驼峰媒体字段。
• 对模型名称进行宽松匹配，仅向受支持的 Gemini Flash 系列模型和视频输入添加该参数。
• 接收但不回放 Gemini 返回的媒体处理工具轨迹，避免多轮请求因工具上下文不匹配而失败。
• 保留 Google Search、URL Context、代码执行和普通函数调用等非媒体工具轨迹。
• 补充中英文配置说明和相关类型。

验证

• yarn tsc --noEmit -p packages/adapter-gemini/tsconfig.json
• yarn fast-build adapter-gemini
• 定向验证流式与非流式响应、旧会话历史、Agentic 开关、非媒体工具轨迹及后续多轮请求。
• 已同步本地 Koishi 实例并确认适配器可正常加载。

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Walkthrough

Gemini 适配器新增 agenticVideo 配置和相关类型。消息转换支持 Agentic 视频、工具调用及上下文重放。流式响应处理支持文本、媒体、工具调用、usage 和 thought 数据。

Changes

Gemini Agentic 视频处理

Layer / File(s)	Summary
配置与类型契约 packages/adapter-gemini/src/index.ts, packages/adapter-gemini/src/types.ts	新增 agenticVideo 配置，默认值为 false。新增并收紧媒体、思考数据、工具调用和工具类型。
媒体转换与工具上下文 packages/adapter-gemini/src/utils.ts	根据配置和模型白名单生成 Agentic 媒体标记。重构媒体、函数结果和工具上下文转换。
Gemini 流式响应处理 packages/adapter-gemini/src/requester.ts	重构响应块解析。使用属性检查处理响应、usage、文本、工具调用和 thought 数据。

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant GeminiConfig
  participant langChainMessageToGeminiMessage
  participant GeminiRequester
  GeminiConfig->>langChainMessageToGeminiMessage: 提供 agenticVideo 配置
  langChainMessageToGeminiMessage->>langChainMessageToGeminiMessage: 转换媒体和工具上下文
  langChainMessageToGeminiMessage-->>GeminiRequester: 返回 Gemini 消息 parts
  GeminiRequester->>GeminiRequester: 解析流式响应和 thought 数据

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Merge Risk: ⚪ Minimal · up to e4f92

The Gemini Agentic video changes are ready to merge after normal checks.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 12.50% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 16 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题明确说明了为 Gemini 增加 Agentic 视频理解支持，准确概括了变更的主要目标。
Description check	✅ Passed	描述与变更内容相关，说明了 Agentic 视频理解、媒体字段兼容、工具轨迹处理、类型更新和验证结果。
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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• Create stacked PR
• Commit on current branch

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_{小兔读过每一行，
新配置在月光下发亮，
视频部件排成队，
工具调用紧相随，
流式响应清晰回响，
Gemini 代码更稳当。}

_{Comment @coderabbitai help to get the list of available commands.}

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Inline comments:
In `@packages/adapter-gemini/src/requester.ts`:
- Around line 643-647: 移除相关响应构造逻辑中的 image 变量及 additional_kwargs.images 字段，仅保留
content 中的图片 data URI；确保 chatluna_storage 不存在且响应含 inlineData 时仍能写入
content，不再重复保存图片数据或触发无效告警。

In `@packages/adapter-gemini/src/utils.ts`:
- Around line 139-143: Update the AIMessage handling around convertCalls so that
when tool_calls are present, the generated Gemini parts also include the
message’s text content. Preserve both the converted function-call parts and
msg.content in the resulting model message, including content produced before
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[dingyi222666]

测试一下有无问题，没问题就合并了

[dingyi222666]

我这边没 api 测试了，

[CookSleep]

看起来没问题

[CookSleep]

不过New API还没支持，得等我的PR被合并：
QuantumNous/new-api#7337

[dingyi222666]

Prepare for 1.4 release