docs(config): align environment and credential contracts

Code already treats $DSH_HOME/.env as ordinary launch environment and stores managed credentials in .credentials.yaml, but public docs still described the old store, old precedence, removed literal adapter keys, and the deleted TUI. That directed users to the wrong file and overstated the supported configuration surface.

Update the existing English and Chinese owners in place, document inherited > managed > project > user credential resolution, and record the loadLayeredEnv export. Regenerate only pairing records and the source-line catalog; add no new section or site route.

docs/cordis-tutorial/05-config.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/cordis-tutorial/05-config.md
-05-config.md: fc19add239636fa9e7071d9c77e48595caec1f08
-05-config.zh.md: 0c8170f518f0c87ab5c754606436496a4ff9d51e
+05-config.md: 8d4043e33a58fc425d82d9846ff82473bcdef4c1
+05-config.zh.md: e9463bd34e9c72dbae7b1ceb9907e35edf7b773b

docs/cordis-tutorial/05-config.md

@@ -69,12 +69,12 @@ The plugin's fiber goes to FAILED, and this tutorial's launcher exits with statu
 
 ## Computed config values
 
-The loader used in this repo supports a `!!js` tag for config values that must be computed at load time, such as reading an API key from the environment:
+The loader used in this repo supports a `!!js` tag for config values that must be computed at load time:
 
 ```yaml
-- name: '@deepseek-ai/dsh-llm-deepseek'
+- name: './config-demo.ts'
   config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
+    greeting: !!js process.env.DEMO_GREETING ?? 'Hello'
 ```
 
 `!!js` works **only inside `config`**. Entry metadata (`name`, `id`, `disabled`, `inject`, ...) is static; `disabled: !!js ...` produces a truthy expression object that always disables the entry. See [loader configuration](../cordis-primer.md#loader-configuration).

docs/cordis-tutorial/05-config.zh.md

@@ -69,12 +69,12 @@ ValidationError: invalid config:
 
 ## 计算得到的配置值
 
-本仓库使用的 loader 支持 `!!js` 标签，用于必须在加载时计算的配置值，例如从环境中读取 API key：
+本仓库使用的 loader 支持 `!!js` 标签，用于必须在加载时计算的配置值：
 
 ```yaml
-- name: '@deepseek-ai/dsh-llm-deepseek'
+- name: './config-demo.ts'
   config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
+    greeting: !!js process.env.DEMO_GREETING ?? 'Hello'
 ```
 
 `!!js` **仅在 `config` 内有效**。Cordis 配置项的元数据（`name`、`id`、`disabled`、`inject` 等）是静态的；`disabled: !!js ...` 会生成一个真值表达式对象，始终禁用该 Cordis 配置项。详见 [loader 配置](../cordis-primer.md#loader-configuration)。