refactor(web): trim AssetManifest to the fields the pipeline reads

The manifest type is Solid's own contract, not a Vite-compat surface —
non-Vite bundlers produce it too, and unknown fields on parsed JSON pass
through structurally without being typed. Drop assets/dynamicImports
(deliberately never consumed) and document preloads as the extension
slot.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: ryansolid

packages/web/src/server-mock.ts

@@ -20,16 +20,20 @@ export type PreloadLink = {
   media?: string;
 };
 
-/** Bundler-agnostic static asset graph compatible with Vite client manifests. */
+/**
+ * Static asset graph consumed by the SSR pipeline. This is Solid's own
+ * contract — a parsed Vite client manifest satisfies it structurally
+ * (unknown fields pass through untyped), but any bundler integration can
+ * produce it. Only these fields are ever read: `preloads` is Solid's
+ * extension slot for explicit typed links the integration selects.
+ */
 export type AssetManifest = Record<
   string,
   {
     file: string;
     css?: string[];
-    assets?: string[];
     isEntry?: boolean;
     imports?: string[];
-    dynamicImports?: string[];
     preloads?: PreloadLink[];
   }
 > & { _base?: string };

packages/web/src/server.ts

@@ -72,16 +72,20 @@ export type PreloadLink = {
   media?: string;
 };
 
-/** Bundler-agnostic static asset graph compatible with Vite client manifests. */
+/**
+ * Static asset graph consumed by the SSR pipeline. This is Solid's own
+ * contract — a parsed Vite client manifest satisfies it structurally
+ * (unknown fields pass through untyped), but any bundler integration can
+ * produce it. Only these fields are ever read: `preloads` is Solid's
+ * extension slot for explicit typed links the integration selects.
+ */
 export type AssetManifest = Record<
   string,
   {
     file: string;
     css?: string[];
-    assets?: string[];
     isEntry?: boolean;
     imports?: string[];
-    dynamicImports?: string[];
     preloads?: PreloadLink[];
   }
 > & { _base?: string };