refactor(llm-deepseek)!: rename the provider route to deepseek-official

The native adapter's route was named deepseek, colliding with pi-ai's
catalog provider of the same name, so the two DeepSeek paths could never
be mounted side by side. The web settings page needs both configurable at
once. Compositions, fixtures, goldens, scaffolding defaults, and docs all
move together (pre-release, no shim); TUI/session-query-spill/
missing-credential goldens re-recorded through their keyless refresh
modes because provider-name length shifts box padding and spill
truncation points.

packages/subagent/subagent-dsh-sdk/README.md

@@ -30,7 +30,7 @@ The provider advertises no start-time capabilities (`outputSchema`/`depthLimit`/
 | `command` | required | Executable spawned per run (the child runtime bin or packaged exe). |
 | `args` | `[]` | Command arguments (typically the child's `cordis.yml` path). |
 | `cwd` | parent session cwd | Working-directory override; same validation as [`subagent-acp`](../subagent-acp/README.md). |
-| `provider` | `deepseek` | Provider route sent in the child's `initialize`. |
+| `provider` | `deepseek-official` | Provider route sent in the child's `initialize`. |
 | `model` | `deepseek-v4-flash` | Model sent in the child's `initialize`. |
 | `maxTokens` | provider default | Per-request output-token cap sent in the child's `initialize`; it applies to the child root agent and its in-process descendants. |
 | `env` | `{}` | Explicit child environment layered over a credential-scrubbed parent environment (e.g. the child's own `DEEPSEEK_API_KEY`, or `DSH_CORDIS_CONFIG`). |

packages/subagent/subagent-dsh-sdk/README.zh.md

@@ -30,7 +30,7 @@ Provider 不宣告任何启动期能力（`outputSchema`/`depthLimit`/`toolFilte
 | `command` | 必填 | 每次 run 生成的可执行文件（子运行时 bin 或打包 exe）。 |
 | `args` | `[]` | 命令参数（通常是子进程的 `cordis.yml` 路径）。 |
 | `cwd` | 父会话 cwd | 工作目录覆盖；校验规则与 [`subagent-acp`](../subagent-acp/README.md) 相同。 |
-| `provider` | `deepseek` | 写入子进程 `initialize` 的 provider 路由。 |
+| `provider` | `deepseek-official` | 写入子进程 `initialize` 的 provider 路由。 |
 | `model` | `deepseek-v4-flash` | 写入子进程 `initialize` 的模型。 |
 | `maxTokens` | provider 默认值 | 写入子进程 `initialize` 的单次请求输出 token 上限；对子根 Agent 及其进程内后代生效。 |
 | `env` | `{}` | 在凭据擦除后的父环境之上叠加的显式子环境（例如子进程自己的 `DEEPSEEK_API_KEY`，或 `DSH_CORDIS_CONFIG`）。 |

packages/subagent/subagent-dsh-sdk/src/index.ts

@@ -42,7 +42,7 @@ export interface Config {
    * fails.
    */
   cwd?: string
-  /** Provider route the child runtime initializes with (default `deepseek`). */
+  /** Provider route the child runtime initializes with (default `deepseek-official`). */
   provider: string
   /** Model the child runtime initializes with (default `deepseek-v4-flash`). */
   model: string
@@ -73,7 +73,7 @@ export const Config: z<Config> = z.object({
   command: z.string().required(),
   args: z.array(z.string()).default([]),
   cwd: z.string(),
-  provider: z.string().default('deepseek'),
+  provider: z.string().default('deepseek-official'),
   model: z.string().default('deepseek-v4-flash'),
   maxTokens: z.number().step(1).min(1).max(Number.MAX_SAFE_INTEGER),
   env: z.dict(z.string()).default({}),

packages/subagent/subagent-spawn/tests/spawn.e2e.ts

@@ -23,7 +23,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('spawn backend with-key smoke', (
   it('a parent delegates to a child that writes a file on disk', async () => {
     workdir = await mkdtemp(join(tmpdir(), 'dsh-subagent-spawn-e2e-'))
     ctx = await spawnHarness(workdir)
-    const parent = ctx.agentLoop.create(SessionId('e2e-parent'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const parent = ctx.agentLoop.create(SessionId('e2e-parent'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })
 
     parent.followup(createUserMessage({
       content: [{ type: 'text', text: