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/volcengine/SOURCES.md

@@ -0,0 +1,82 @@
+# 火山引擎：官网证据目录
+
+[供应商索引](README.md)
+
+核验日期：2026-10-03。这里只登记可复用的官网证据与适用边界，具体模型与接入面分别记录。
+
+## 官网证据
+
+### volcengine-models
+
+- 入口：[volcengine-models](https://docs.volcengine.com/docs/ark/model-list?lang=zh)
+- 类型：`official-doc`；当前读取状态：`shell`；地域/接入面：`volcengine 官方入口；具体地域与接入面待该页面逐字段确认`。
+### volcengine-latest
+
+- 入口：[volcengine-latest](https://docs.volcengine.com/docs/ark/latest-model?lang=zh)
+- 类型：`official-doc`；当前读取状态：`shell`；地域/接入面：`volcengine 官方入口；具体地域与接入面待该页面逐字段确认`。
+### volcengine-plan
+
+- 入口：[volcengine-plan](https://docs.volcengine.com/docs/ark/coding-plan-personal-model-release?lang=zh)
+- 类型：`official-doc`；当前读取状态：`shell`；地域/接入面：`volcengine 官方入口；具体地域与接入面待该页面逐字段确认`。
+### volcengine-seed
+
+- 入口：[volcengine-seed](https://docs.volcengine.com/docs/82379/2549861)
+- 类型：`official-doc`；当前读取状态：`unreadable`；地域/接入面：`volcengine 官方入口；具体地域与接入面待该页面逐字段确认`。
+
+## 已知边界与核验说明
+
+官方页面本次返回 JavaScript 页面壳，不能把 HTTP 200 当参数证明。Seed 2.1 Pro/Turbo 当前配置的输入/输出数字与官网最新值需通过控制台或正文继续核实；本次不采用开发者社区文章补数。
+
+状态 `partial` 仅表示列出的字段已核实；不能推断整条配置、价格、账号权限或真实模型调用都已验收。`pending` 没有已核字段；`historical` 只作历史兼容参考。路由 tier/priority、产品标签和默认选择属于本仓策略，不伪装成官网数据。
+
+<!-- source-metadata:start -->
+```json
+{
+  "formatVersion": 1,
+  "supplier": "volcengine",
+  "checkedAt": "2026-10-03",
+  "sources": [
+    {
+      "id": "volcengine-models",
+      "url": "https://docs.volcengine.com/docs/ark/model-list?lang=zh",
+      "kind": "official-doc",
+      "scope": "volcengine 官方入口；具体地域与接入面待该页面逐字段确认",
+      "retrieval": "shell",
+      "checkedAt": "2026-10-03",
+      "contentSha256": "f778a4ab9ca6a777e6b48c061c18aca14d3b9c25a02d0415d9375bcb6b7eba9d",
+      "resolvedUrl": "https://docs.volcengine.com/docs/ark/model-list?lang=zh"
+    },
+    {
+      "id": "volcengine-latest",
+      "url": "https://docs.volcengine.com/docs/ark/latest-model?lang=zh",
+      "kind": "official-doc",
+      "scope": "volcengine 官方入口；具体地域与接入面待该页面逐字段确认",
+      "retrieval": "shell",
+      "checkedAt": "2026-10-03",
+      "contentSha256": "ec23e84786c64869d37af1ce3ad95ed0ccceeabf47c1b8dce92fae81c62919f1",
+      "resolvedUrl": "https://docs.volcengine.com/docs/ark/latest-model?lang=zh"
+    },
+    {
+      "id": "volcengine-plan",
+      "url": "https://docs.volcengine.com/docs/ark/coding-plan-personal-model-release?lang=zh",
+      "kind": "official-doc",
+      "scope": "volcengine 官方入口；具体地域与接入面待该页面逐字段确认",
+      "retrieval": "shell",
+      "checkedAt": "2026-10-03",
+      "contentSha256": "5c92f4be6cd794f2fc3390f4c06c75b965f604bbc2daa1f118de65bf58a0ad38",
+      "resolvedUrl": "https://docs.volcengine.com/docs/ark/coding-plan-personal-model-release?lang=zh"
+    },
+    {
+      "id": "volcengine-seed",
+      "url": "https://docs.volcengine.com/docs/82379/2549861",
+      "kind": "official-doc",
+      "scope": "volcengine 官方入口；具体地域与接入面待该页面逐字段确认",
+      "retrieval": "unreadable",
+      "checkedAt": "2026-10-03",
+      "contentSha256": null,
+      "resolvedUrl": null
+    }
+  ]
+}
+```
+<!-- source-metadata:end -->