feat: #732 Angular 19 Upgrade

[ianliuwk1019]

FOM Angular upgrade from v17 to v19.

• Update package.json on Angular and some impacted libraries.
• Upgrade on both Admin and Public sides.
• Update all SCSS files to use newer SCSS rule: replacing @import with @use and
  fixed impact SCSS variables with namespace.
• Update cognito.service.ts to replace 'amazon-cognito-identity-js' with use of aws-amplify/auth,
  and adjust imapct on token parsing at auth.service.ts
• Fixed a failing test (known one since old time) at project.service.spec.ts so the test does not fail in pipeline run at certain time (due to timezone).

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Thanks for the PR!

Deployments, as required, will be available below:

• api
• admin
• public

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

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---

Thanks for the PR!

Deployments, as required, will be available below:

• api
• admin
• public

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

After merge, new images are deployed in:

• Merge Workflow

---

Thanks for the PR!

Deployments, as required, will be available below:

• api
• admin
• public

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

After merge, new images are deployed in:

• Merge Workflow

[jazzgrewal]

Approved! Thanks for the thorough Angular v17→v19 upgrade and the cleanup across the workspace.

Summary of what I understood this PR does:

• Upgrades Angular and related libs (package.json updates across admin/public/libs)
• Migrates SCSS from @import to @use and adds namespacing for variables
• Replaces amazon-cognito-identity-js with aws-amplify/auth and updates token parsing
• Fixes a timezone‑related flaky test (project.service.spec.ts)

I had a quick look at the Angular frontend and it looks good and the app is functioning well, while communicating to the API.