fix(applaunchpad): rebind routes after service changes

[mlhiter]

Summary

Clear stale bindings from routes that target the application's regenerated main Service when access mode, protocol, or imported network settings change. Preserve routes that explicitly target other backend Services, and keep default route ports synchronized with the regenerated Service. Add unit coverage for route rebinding and generated Ingress backends.

Sequence Diagram

sequenceDiagram
    participant User
    participant EditForm
    participant RouteBinding
    participant ManifestGenerator

    User->>EditForm: Change network topology or import settings
    EditForm->>RouteBinding: Rebind routes from the previous main Service
    alt Route targets the previous main Service
        RouteBinding-->>EditForm: Clear the stale Service name
    else Route targets an explicit external Service
        RouteBinding-->>EditForm: Preserve the explicit backend
    end
    EditForm->>ManifestGenerator: Generate Service and Ingress manifests
    ManifestGenerator-->>User: Ingress targets the regenerated main Service

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Verification

pnpm --filter applaunchpad lint, pnpm --filter applaunchpad exec tsc --noEmit --pretty false, and pnpm --filter applaunchpad build pass. The focused Vitest command could not run because the installed dependency graph does not provide a vitest executable.