Frontend Release v0.53.0

This PR prepares a new frontend release.

When merged, this will:

1. Create a release tag
2. Build and publish a multi-architecture Docker image to Docker Hub

The Docker image will be available at:

• deploystack/frontend:latest
• deploystack/frontend:v0.53.0

Supported Architectures

• linux/amd64 (Intel/AMD)
• linux/arm64 (Apple Silicon, AWS Graviton)
• linux/arm/v7 (Raspberry Pi, IoT devices)

Environment Variables

The Docker image will include DEPLOYSTACK_FRONTEND_VERSION environment variable set to the current version.

Release notes:

• chore(frontend): update logo and favicon images (5d5153c4)
• feat(frontend): add role change dialog to user detail page (786c0151)
• chore(all): update deploystack banner image (924cbcb5)
• feat(frontend): add runtime badge visibility toggle to server card (95f9a8ba)
• feat(all): implement per-user MCP instance isolation for multi-user teams (bc9d1833)
• refactor(frontend): convert admin users detail page to multi-route structure (bd3f8cd9)
• refactor(all): move admin user routes to /api/admin/users (c319dd06)
• refactor(frontend): simplify server installation routing logic (cacd4430)
• feat(frontend): add template and schema props to server configuration (e4d389f8)