fix(chat, strategy-curator): set output.assetPrefix so federated sub-chunks resolve against the remote's own origin, not the host's

Both remotes had `dev.assetPrefix` set (correct for local federation dev)
but no `output.assetPrefix` — the field that also applies to production
builds. Without it, a remote's async sub-chunks (e.g. chat's
__federation_expose_mount.js) resolve as relative paths against whatever
page loaded them — the shell's origin, not the remote's — so on the real
deploy every chat sub-chunk 404'd against augment.didi.sh and got back
the shell's own SPA-fallback HTML, which the browser then tried to eval
as JS ("SyntaxError: Unexpected token '<'"). Caught via a live browser
check against the actual deployed augment.didi.sh, not a local test —
this only reproduces cross-origin.

New PUBLIC_CHAT_ASSET_PREFIX / PUBLIC_STRATEGY_CURATOR_ASSET_PREFIX env
vars (localhost defaults preserved for dev), threaded through as Docker
build args. Verified locally: built each image with the real deployed
origin as the arg, extracted dist/, confirmed remoteEntry.js references
the correct origin instead of relative paths.

Files changed:
- apps/chat/rsbuild.config.ts
- apps/chat/Dockerfile
- apps/strategy-curator/rsbuild.config.ts
- apps/strategy-curator/Dockerfile

Author: mpstaton

apps/chat/Dockerfile

@@ -18,7 +18,9 @@ COPY shell ./shell
 RUN pnpm install --frozen-lockfile
 
 ARG PUBLIC_WS_URL
+ARG PUBLIC_CHAT_ASSET_PREFIX
 ENV PUBLIC_WS_URL=$PUBLIC_WS_URL
+ENV PUBLIC_CHAT_ASSET_PREFIX=$PUBLIC_CHAT_ASSET_PREFIX
 RUN pnpm --filter @augment-it/chat build
 
 FROM node:22-alpine

apps/chat/rsbuild.config.ts

@@ -7,6 +7,16 @@ import { pluginModuleFederation } from '@module-federation/rsbuild-plugin';
 // .css side-effect imports). See changelog entries:
 // - 2026-05-21_03 — federation-meets-Svelte-5 lessons
 // - 2026-05-23_01 — in-app chat v0.0.1 (this surface)
+// Own-origin asset prefix — a federated remote's sub-chunks (async imports,
+// __federation_expose_mount, etc.) resolve against whatever `assetPrefix`
+// this build was compiled with, NOT the host page's origin. Missing this
+// in production silently 404s every chunk beyond remoteEntry.js itself
+// against the SHELL's origin (which serves its own SPA fallback HTML for
+// unknown paths) — "SyntaxError: Unexpected token '<'" is that HTML being
+// eval'd as JS. `dev.assetPrefix` alone only covers the local dev server;
+// `output.assetPrefix` is the field that also applies to production builds.
+const ASSET_PREFIX = process.env.PUBLIC_CHAT_ASSET_PREFIX || 'http://localhost:3006';
+
 export default defineConfig({
   plugins: [
     pluginSvelte(),
@@ -25,6 +35,7 @@ export default defineConfig({
   output: {
     target: 'web',
     overrideBrowserslist: ['last 2 Chrome versions', 'last 2 Firefox versions', 'last 2 Safari versions'],
+    assetPrefix: ASSET_PREFIX,
   },
   tools: {
     swc: {
@@ -41,6 +52,6 @@ export default defineConfig({
     cors: { origin: ['http://localhost:3100'] }, // the federation shell
   },
   dev: {
-    assetPrefix: 'http://localhost:3006',
+    assetPrefix: ASSET_PREFIX,
   },
 });

apps/strategy-curator/Dockerfile

@@ -18,7 +18,9 @@ COPY shell ./shell
 RUN pnpm install --frozen-lockfile
 
 ARG PUBLIC_WS_URL
+ARG PUBLIC_STRATEGY_CURATOR_ASSET_PREFIX
 ENV PUBLIC_WS_URL=$PUBLIC_WS_URL
+ENV PUBLIC_STRATEGY_CURATOR_ASSET_PREFIX=$PUBLIC_STRATEGY_CURATOR_ASSET_PREFIX
 RUN pnpm --filter @augment-it/strategy-curator build
 
 FROM node:22-alpine

apps/strategy-curator/rsbuild.config.ts

@@ -6,6 +6,12 @@ import { pluginModuleFederation } from '@module-federation/rsbuild-plugin';
 // sources (metadata-first → fetch via Jina/PDF), pull extracts. Writes only
 // through workspace capabilities (strategy.* / source.* / extract.* / tag.*).
 // See context-v/specs/Strategy-Curator-Entry-Point-for-Augment-It.md.
+// Own-origin asset prefix — see apps/chat/rsbuild.config.ts's comment for
+// the full rationale (a federated remote's sub-chunks resolve against
+// whatever assetPrefix it was compiled with, not the host's origin;
+// dev.assetPrefix alone doesn't cover production builds).
+const ASSET_PREFIX = process.env.PUBLIC_STRATEGY_CURATOR_ASSET_PREFIX || 'http://localhost:3017';
+
 export default defineConfig({
   plugins: [
     pluginSvelte(),
@@ -24,6 +30,7 @@ export default defineConfig({
   output: {
     target: 'web',
     overrideBrowserslist: ['last 2 Chrome versions', 'last 2 Firefox versions', 'last 2 Safari versions'],
+    assetPrefix: ASSET_PREFIX,
   },
   tools: {
     swc: {
@@ -38,6 +45,6 @@ export default defineConfig({
     cors: { origin: ['http://localhost:3100'] }, // the federation shell
   },
   dev: {
-    assetPrefix: 'http://localhost:3017',
+    assetPrefix: ASSET_PREFIX,
   },
 });