feat(job/init): add default values for admin configuration in init-job deployment template

[Copilot]

Problem

The init-job deployment template (controllers/job/init/deploy/manifests/deploy.yaml.tmpl) did not provide default values for admin configuration environment variables. This could lead to "Invalid username or password" errors when these values were not explicitly configured during deployment, as the init-job would fail to create the admin user with the expected credentials.

Solution

Updated the deployment template to include default values for admin configuration environment variables, matching the defaults defined in controllers/job/init/internal/util/database/types.go:

• ADMIN_PASSWORD: Now defaults to "sealos2023" (the default password defined in code)
• ADMIN_USER_NAME: Added with default value "admin"
• WORKSPACE_PREFIX: Added with default value "ns-"

These defaults ensure that the init-job can run successfully and create the admin user with the expected credentials even when these values are not explicitly provided in the deployment configuration.

Changes

env:
  - name: PASSWORD_SALT
    value: {{ .PASSWORD_SALT }}
  - name: ADMIN_PASSWORD
-   value: {{ .ADMIN_PASSWORD }}
+   value: {{ .ADMIN_PASSWORD | default "sealos2023" }}
+ - name: ADMIN_USER_NAME
+   value: {{ .ADMIN_USER_NAME | default "admin" }}
+ - name: WORKSPACE_PREFIX
+   value: {{ .WORKSPACE_PREFIX | default "ns-" }}

Benefits

• Fixes the "Invalid username or password" issue when admin credentials are not explicitly configured
• Reduces deployment complexity by providing sensible defaults
• Maintains backward compatibility - custom values can still override the defaults
• Aligns template with code defaults ensuring consistency across the codebase

Testing

• Built the init-job controller successfully
• Verified template rendering with multiple scenarios (no values, custom values, partial values)
• Confirmed defaults match the constants in types.go

Closes #6090

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Invalid usename or password</issue_title>
<issue_description>

Discussed in #6090

^{Originally posted by GlennZhang October 15, 2025}

本地安装sealos，根据install-v2.sh完成安装后提示username和password为admin，sealos2023。但在网页端输入后显示Invalid usename or password。有什么方法可以解决或进行排查，能否重置密码或者开放注册吗。
另外我还看了下mongodb是否正常运行了。

root@slf:~/.sealos# kubectl get pod -n sealos -l app.kubernetes.io/instance=sealos-mongodb
NAME                       READY   STATUS    RESTARTS   AGE
sealos-mongodb-mongodb-0   3/3     Running   0          20h
```</div>


</issue_description>

<agent_instructions>Set the controllers/job/init/deploy/manifests/deploy.yaml.tmpl template of init-job to support the default password </agent_instructions>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

Fixes #6116

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