[codex] Sandbox dynamic adapter UI parsers (#4225)

## Thinking Path

> - Paperclip is a control plane for AI-agent companies.
> - External adapters can provide UI parser code that the board loads
dynamically for run transcript rendering.
> - Running adapter-provided parser code directly in the board page
gives that parser access to same-origin browser state.
> - This PR narrows that surface by evaluating dynamically loaded
external adapter UI parser code in a dedicated browser Web Worker with a
constrained postMessage protocol.
> - The worker here is a frontend isolation boundary for adapter UI
parser JavaScript; it is not Paperclip's server plugin-worker system and
it is not a server-side job runner.

## What Changed

- Runs dynamically loaded external adapter UI parsers inside a dedicated
Web Worker instead of importing/evaluating them directly in the board
page.
- Adds a narrow postMessage protocol for parser initialization and line
parsing.
- Caches completed async parse results and notifies the adapter registry
so transcript recomputation can synchronously drain the final parsed
line.
- Disables common worker network, persistence, child worker, Blob/object
URL, and WebRTC escape APIs inside the parser worker bootstrap.
- Handles worker error messages after initialization and drains pending
callbacks on worker termination or mid-session worker error.
- Adds focused regression coverage for the parser worker lockdown and
unused protocol removal.

## Verification

- `pnpm exec vitest run --config ui/vitest.config.ts
ui/src/adapters/sandboxed-parser-worker.test.ts`
- `pnpm exec tsc --noEmit --target es2021 --moduleResolution bundler
--module esnext --jsx react-jsx --lib dom,es2021 --skipLibCheck
ui/src/adapters/dynamic-loader.ts
ui/src/adapters/sandboxed-parser-worker.ts
ui/src/adapters/sandboxed-parser-worker.test.ts`
- `pnpm --filter @paperclipai/ui typecheck` was attempted; it reached
existing unrelated failures in HeartbeatRun test/storybook fixtures and
missing Storybook type resolution, with no adapter-module errors
surfaced.
- PR #4225 checks on current head `34c9da00`: `policy`, `e2e`, `verify`,
`security/snyk`, and `Greptile Review` are all `SUCCESS`.
- Greptile Review on current head `34c9da00` reached 5/5.

## Risks

- Medium risk: parser execution is now asynchronous through a worker
while the existing parser interface is synchronous, so transcript
updates should be watched with external adapters.
- Some adapter parser bundles may rely on direct ESM `export` syntax or
browser APIs that are no longer available inside the worker lockdown.
- The worker lockdown is a hardening layer around external parser code,
not a complete browser security sandbox for arbitrary untrusted
applications.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, GPT-5-based coding agent runtime, shell/git tool use
enabled. Exact hosted model build and context window are not exposed in
this Paperclip heartbeat environment.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

ui/src/adapters/registry.ts

@@ -9,7 +9,7 @@ import { openClawGatewayUIAdapter } from "./openclaw-gateway";
 import { hermesLocalUIAdapter } from "./hermes-local";
 import { processUIAdapter } from "./process";
 import { httpUIAdapter } from "./http";
-import { loadDynamicParser, invalidateDynamicParser } from "./dynamic-loader";
+import { loadDynamicParser, invalidateDynamicParser, setDynamicParserResultNotifier } from "./dynamic-loader";
 import { SchemaConfigFields, buildSchemaAdapterConfig } from "./schema-config-fields";
 
 const uiAdapters: UIAdapterModule[] = [];
@@ -45,6 +45,8 @@ function notifyAdapterChange(): void {
   for (const fn of adapterChangeListeners) fn();
 }
 
+setDynamicParserResultNotifier(notifyAdapterChange);
+
 function registerBuiltInUIAdapters() {
   for (const adapter of [
     claudeLocalUIAdapter,