feat(ui): gateway browser panel with annotate-to-prompt and element inspect in the web Control UI (#104012)

* feat(ui): add gateway browser panel with annotate and inspect modes

* chore(i18n): translate browser panel strings

* fix(ui): address browser panel review findings (stable tab handles, stale view guard, inspect click suppression)

* fix(ui): make the browser panel reload button reload the remote page

* fix(ui): tile the browser dock against the terminal dock and re-probe evaluate per connection

* fix(ui): label page-reported prompt text as untrusted and accept host:port URL entries

* fix(ui): sanitize inspected selector fragments in the annotation prompt

* fix(i18n): retranslate annotation prompt keys so the page-reported provenance label survives localization

* docs: regenerate docs map for the browser panel section

* chore(i18n): reconcile locale bundles with latest main after rebase

* style(ui): format chat-pane imports after rebase

* chore(i18n): refresh locale metadata after rebase

docs/docs_map.md

@@ -9951,6 +9951,7 @@ Do not edit it by hand; run `pnpm docs:map:gen`.
   - H2: MCP page
   - H2: Activity tab
   - H2: Operator terminal
+  - H2: Browser panel
   - H2: Chat behavior
   - H2: Connection loss and reconnect
   - H2: PWA install and web push