[Testing E2E] Add Test Scenario for Admin Instance Plan Page

[jinnaWan]

Summary

[Copilot]

Pull Request Overview

This PR introduces comprehensive end‑to‑end tests for the Admin Instance Plan Page and updates related page objects, data models, and configuration files to support the new admin plan functionalities.

• Adds new e2e test scenarios for creating, editing, and deleting instance plans.
• Updates page objects and test data models to support the admin UI interactions.
• Adjusts frontend test IDs and configuration settings in Docker and backend infra.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/e2e/scenarios/test_admin_instance_plan.py	New tests for admin instance plan management scenarios.
test/e2e/pages/common/side_nav_bar.py	Added admin side navbar items for system, users, plans, and credits.
test/e2e/pages/admin/admin_instance_plan_page.py	Introduces a page object for admin instance plan page operations.
test/e2e/pages/admin/init.py	Exports the new AdminInstancePlanPage.
test/e2e/data/models.py	Modifies InstancePlanData by making instance_plan_id optional.
test/e2e/data/constant.py	Updates Currency precision to 4.
frontend/src/pages/Admin/InstancePlanManagePage.tsx	Adds data-testid attributes for reliable element selection.
docker/app/docker-compose.yaml	Adjusts the VITE_API_URL argument by removing its default value.
backend/src/infra/config.py	Enhances LXD_HOST resolution with a fallback strategy.

Comments suppressed due to low confidence (1)

test/e2e/data/models.py:51

• Ensure that Optional is imported from the typing module to avoid a NameError.

instance_plan_id: Optional[int] = None

[jinnaWan]

@nut1414 pls help review

[nut1414]

Shouldnot be able to delete plan when insance exist missi g

[jinnaWan]

There is no delete button for edit only plan, but if u want it we can have an api test

[nut1414]

I mean just assertion for that button. Button should not exist.