fix(web-pkg): [OCISDEV-482] handle file info loading error

[LukasHirt]

Description

Skip loading file content if getting the file info fails. This prevents an unexpected error when opening a file.

Motivation and Context

Handle exceptions with user friendly messages.

How Has This Been Tested?

• test environment: macos, chrome
• test case 1: open a .docx file and manually change the ID in the URL

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests
• Documentation
• Maintenance (e.g. dependency updates or tooling)

[Copilot]

Pull Request Overview

This PR adds a guard condition to prevent loading file content when the resource information is unavailable, addressing an error that could occur when opening a file if the initial file info retrieval fails.

• Adds a null check for the resource variable at the beginning of loadFileTask

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
packages/web-pkg/src/components/AppTemplates/AppWrapper.vue	Added guard condition to skip file loading when resource is undefined
changelog/unreleased/bugfix-handle-file-loading-error.md	Added changelog entry documenting the bugfix

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud