fix(web): orient agents to the running GUI

apps/web/tests/scaffold.ts

@@ -44,6 +44,7 @@ import * as ToolCordis from '@deepseek-ai/dsh-tool-cordis'
 // Empty type imports carry the httpServer/agents/sessionPersistence Context merges.
 import type {} from '@deepseek-ai/dsh-host-webserver'
 import type {} from '@deepseek-ai/dsh-agent'
+import { installWebPromptContext } from '../../cli/src/web.ts'
 import { DIST_INDEX, REPO_ROOT, requireDist } from './support.ts'
 
 /** Snapshot mode for the lane, from $DSH_SNAPSHOT (same vocabulary as the ACP/TUI suites). */
@@ -202,6 +203,7 @@ export async function launchWebScaffold(options: LaunchOptions = {}): Promise<We
     })
     await ctx.loader.await()
     assertEntriesLoaded(ctx, 'web e2e scaffold')
+    installWebPromptContext(ctx, REPO_ROOT)
     const boundPort = ctx.get('httpServer')?.port
     if (boundPort === undefined) {
       throw new Error('web e2e scaffold: httpServer service missing after settled boot')