chore: remove -frontend suffix from default frontend routes

[Copilot]

Teams want the frontend as their front-facing URL without the component name suffix.

Changes

• Ingress host template: Changed from {{ include "frontend.fullname" . }} to {{ .Release.Name }} in charts/app/templates/frontend/templates/ingress.yaml

Impact

# Before
host: myapp-frontend.apps.silver.devops.gov.bc.ca

# After  
host: myapp.apps.silver.devops.gov.bc.ca

Internal resource names (myapp-frontend) remain unchanged for backward compatibility.

Original prompt

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This section details on the original issue you should resolve

<issue_title>chore: remove -frontend from default frontend routes</issue_title>
<issue_description>Most teams want the frontend as their front-facing URL. Remove -frontend from those routes. ...which seems really obvious in retrospect.</issue_description>

<agent_instructions>https://github.com/bcgov/copilot-instructions/blob/main/.github/copilot-upstream.md</agent_instructions>

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

• Fixes chore: remove -frontend from default frontend routes #2512

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[Copilot]

Pull request overview

This PR simplifies the frontend ingress host pattern by removing the -frontend suffix from the default route, making the application accessible at a cleaner URL (e.g., myapp.apps.silver.devops.gov.bc.ca instead of myapp-frontend.apps.silver.devops.gov.bc.ca).

Key Changes

• Modified ingress host template to use {{ .Release.Name }} instead of {{ include "frontend.fullname" . }}
• Internal resource names (services, deployments, etc.) remain unchanged at {release-name}-frontend for backward compatibility

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