feat: review slot appears in every aux-model picker (desktop, dashboard, CLI)

Follow-up to #93339: the auxiliary.review slot existed in config but was
missing from every model-picker surface, so users could only set the
review model by hand-editing config.yaml.

- hermes_cli/web_server.py: review in _AUX_TASK_SLOTS (REST allowlist,
  stale-aux warning sweep)
- hermes_cli/main.py: review in _AUX_TASKS (hermes model aux picker)
- apps/desktop model-settings.tsx + all 5 i18n locales (en/ja/zh/
  zh-hant/ar): review slot with label/hint
- web/src/pages/ModelsPage.tsx: review row in dashboard Models page
- tests: registry-sync test pinning review across DEFAULT_CONFIG,
  _AUX_TASKS, and _AUX_TASK_SLOTS (curator pattern)
- docs: aux-task table in fallback-providers.md (en) + zh-Hans mirrors
  of fallback-providers and the delegation /review section missed in
  #93339

web/src/pages/ModelsPage.tsx

@@ -58,6 +58,7 @@ const AUX_TASKS: readonly { key: string; label: string; hint: string }[] = [
   { key: "approval", label: "Approval", hint: "Smart auto-approve" },
   { key: "mcp", label: "MCP", hint: "MCP tool routing" },
   { key: "title_generation", label: "Title Gen", hint: "Session titles" },
+  { key: "review", label: "Review", hint: "/review subagent" },
   { key: "triage_specifier", label: "Triage Specifier", hint: "Kanban spec fleshing" },
   { key: "kanban_decomposer", label: "Kanban Decomposer", hint: "Task decomposition" },
   { key: "profile_describer", label: "Profile Describer", hint: "Auto profile descriptions" },