test(web): keyless browser e2e lane — replayed round trip + seeded cold resume

apps/web/tests/harness.ts boots the real web assembly in-process
(startHost llm:false -> installLlmReplay providers-mode -> mountWebPlugins
-> startWebServer) under DSH_SNAPSHOT replay/record/refresh. Barrier
stack: in-process turn/end -> agent.whenIdle (covers the persistence
flush) -> browser settled-poll. Seeding goes through the real persistence
API (semantic-checkpoint precedent); record harvests fixtures from live
session memory and tokenizes {{sessionId}}/{{cwd}}; refresh is the sole
golden writer. Console tripwires fail scenarios on reconnect/gap-repair
self-healing; harness close asserts full replay-fixture consumption.

Scenarios, each with fixtures recorded against THIS assembly via a live
model run: replay-round-trip (real composer -> real bash echo -> settled
markdown + aria golden + world-state event asserts) and seeded-history
(cold sidebar list -> implicit resume on open -> history tool cards from
the log, zero model calls). apps/web/tests are host-plane programs:
excluded from the client-registered apps/web project, included in
tsconfig.host.json (one program cannot hold both Context merge sides).

tsconfig.host.json

@@ -8,6 +8,10 @@
     "rewriteRelativeImportExtensions": false
   },
   "include": [
+    "apps/web/tests/harness.ts",
+    "apps/web/tests/support.ts",
+    "apps/web/tests/replay-round-trip.e2e.ts",
+    "apps/web/tests/seeded-history.e2e.ts",
     "examples/*/src/**/*.ts",
     "examples/*/start.ts",
     "examples/*/tests/**/*.ts",