fix: add package-lock.json to unblock CI npm ci step

[Copilot]

npm ci in GitHub Actions was failing because package-lock.json didn't exist in the repo — it was explicitly excluded via .gitignore.

Changes

• .gitignore: removed package-lock.json entry so the lock file can be tracked
• package-lock.json: generated via npm install and committed — pins all 109 transitive dependencies for deterministic CI installs

Original prompt

Your CI workflow fails because a lock file (such as package-lock.json) is missing from the repository root. To fix this, generate a package-lock.json by running npm install locally, then commit and add the resulting file. This will ensure that npm ci works as expected in GitHub Actions.

Steps:

1. Run npm install in the repository root to generate package-lock.json.
2. Add and commit package-lock.json.
3. Push the changes to a new branch and open a pull request.

This enables deterministic CI builds and resolves the missing lock file error during the "Install Dependencies" step.

The following is the prior conversation context from the user's chat exploration (may be truncated):

User: Please find a solution for failing job 73896155644. Use the logs, job definition, and any referenced files where the failure occurred. Keep your response focused on the solution and include code suggestions when appropriate.

Assistant: The failing job (73896155644) error is:

Dependencies lock file is not found in /home/runner/work/html-projects/html-projects. Supported file patterns: package-lock.json, npm-shrinkwrap.json, yarn.lock

Solution:
Add a lock file to your repository root, such as package-lock.json (for npm) or yarn.lock (for yarn). To generate package-lock.json, run:

npm install

Then commit the generated package-lock.json file. This will allow npm ci to succeed in your GitHub Actions workflow.

User: do that

Assistant: To resolve the failing CI job, I will generate a package-lock.json by running npm install and add it to the repository. This will allow npm ci to run successfully in your workflow.

I'll open a pull request with the generated package-lock.json file to fix the issue.

Assistant: I am generating and adding the missing package-lock.json file to your repository to resolve the CI workflow failure and will open a pull request with this fix.

This pull request was created from Copilot chat.