docs: split model source records and unify project instructions (#113)

* docs: split model sources and consolidate project instructions

* docs: normalize empty model navigation footer

docs/model-sources/providers/google/access/model-specs--google.md

@@ -0,0 +1,55 @@
+# Google Gemini：google 接入面
+
+[供应商索引](../README.md) · [官网证据](../SOURCES.md)
+
+- 配置文件：[compute/model-specs/google.json](../../../../../compute/model-specs/google.json)
+- 核验日期：2026-10-03。
+- 接入类别：`model-specs`。
+
+## 平台配置快照
+
+这是模型共享规格文件，不声明账号权限、平台计价或服务端点。
+
+以上是配置快照，不能据此宣布该端点或账号已实际验收。核查地域、套餐支持、凭据来源及协议时，对照官网证据目录并记录结论。
+
+<!-- source-config: compute/model-specs/google.json -->
+<!-- source-config-fingerprint: a3f84b38bef347808a425fb1c191273696638b8265f55ffa244154ba65edbb99 -->
+
+## 关联模型
+
+- [`gemini-embedding-2`](../models/gemini-embedding-2.md)
+- [`gemini-3.5-transcribe-live`](../models/gemini-3.5-transcribe-live.md)
+- [`gemini-3.5-transcribe`](../models/gemini-3.5-transcribe.md)
+- [`gemini-3.8-live-extended-thinking`](../models/gemini-3.8-live-extended-thinking.md)
+- [`gemini-3.8-live`](../models/gemini-3.8-live.md)
+- [`gemini-3.8-flash-lite-tts`](../models/gemini-3.8-flash-lite-tts.md)
+- [`gemini-3.8-flash-tts`](../models/gemini-3.8-flash-tts.md)
+- [`gemini-3.8-flash`](../models/gemini-3.8-flash.md)
+- [`gemini-3.7-flash`](../models/gemini-3.7-flash.md)
+- [`gemini-3.5-flash-lite`](../models/gemini-3.5-flash-lite.md)
+- [`gemini-3.1-flash-lite-image`](../models/gemini-3.1-flash-lite-image.md)
+- [`gemini-3.5-flash`](../models/gemini-3.5-flash.md)
+- [`gemini-3.1-flash-image`](../models/gemini-3.1-flash-image.md)
+- [`gemini-3.1-pro-preview`](../models/gemini-3.1-pro-preview.md)
+- [`gemini-3-flash-preview`](../models/gemini-3-flash-preview.md)
+- [`gemini-2.5-pro`](../models/gemini-2.5-pro.md)
+- [`gemini-2.5-flash`](../models/gemini-2.5-flash.md)
+- [`gemini-3.1-flash-lite-preview`](../models/gemini-3.1-flash-lite-preview.md)
+- [`text-embedding-005`](../models/text-embedding-005.md)
+
+## 更新前检查
+
+- 核对端点和地域、API 格式、凭据来源、版本要求及套餐实际支持名单。
+- 修改平台字段后复核本文件；修改模型字段后更新对应单模型文件。
+- 未取得官网参数或账号实测证据时，保留 pending / 未实测说明，不以表格快照代替证据。
+
+<!-- source-metadata:start -->
+```json
+{
+  "formatVersion": 1,
+  "supplier": "google",
+  "checkedAt": "2026-10-03",
+  "sourceCatalog": "../SOURCES.md"
+}
+```
+<!-- source-metadata:end -->