SSR manifest embeds the source index.html, not the built client index.html #696

Found while reviewing #685. Older than it.

angular-ssr-manifest-plugin.ts buildStart reads resolve(root, 'index.html'), the source page, and embeds it as the server's index.server.html asset. The Angular CLI serves the built browser index.html, which has the hashed <script> / <link> tags.

source index.html   <script type="module" src="/src/main.ts">   ← what the SSR response gets
built  index.html   <script type="module" src="/assets/index-AbC123.js">  ← what the browser needs

So the server-rendered page points at /src/main.ts, which doesn't exist in production, and the client app never boots or hydrates. Applies to vite build --ssr and to Environment API builds (vite build --app, where the client builds first).

Possible direction: in server environments, use the client environment's built index.html (its resolved build.outDir, or capture it in the client's generateBundle). Fall back to the source file with a warning.