fix(web): harden multimodal draft and storage lifecycle

packages/client/connection/tests/node-half.spec.ts

@@ -51,7 +51,10 @@ function fakeResponse(): { response: ServerResponse; state: { status?: number; b
   return { response, state }
 }
 
-async function mounted(config?: { trustedHosts?: string[] }): Promise<{ routes: WebRoute[]; dispose: () => Promise<void> }> {
+async function mounted(config?: {
+  trustedHosts?: string[]
+  maxRequestBodyBytes?: number
+}): Promise<{ routes: WebRoute[]; dispose: () => Promise<void> }> {
   const ctx = new Context()
   const routes: WebRoute[] = []
   ctx.provide('httpServer', fakeHttpServer(routes) as HttpServerService)
@@ -96,6 +99,17 @@ describe('connection node half', () => {
     expect(routes).toHaveLength(0)
   })
 
+  it('fails loud when the independent carrier cap cannot hold the configured image batch', () => {
+    const ctx = new Context()
+    const routes: WebRoute[] = []
+    ctx.provide('httpServer', fakeHttpServer(routes) as HttpServerService)
+    ctx.provide('apiProxy', {} as unknown as ApiProxy)
+    ctx.provide('attachments', fakeAttachments())
+    expect(() => { apply(ctx, { maxRequestBodyBytes: 1024 }) })
+      .toThrow(/must be at least .* aggregate image limit/)
+    expect(routes).toHaveLength(0)
+  })
+
   it('refuses an untrusted Host on any /api path before the bridge runs', async () => {
     const { routes, dispose } = await mounted()
     const { response, state } = fakeResponse()