Extract adapter registry across CLI, server, and UI

Refactor monolithic heartbeat service, AgentConfigForm, and CLI
heartbeat-run into a proper adapter registry pattern. Each adapter
type (process, claude-local, codex-local, http) gets its own module
with server-side execution logic, CLI invocation, and UI config form.
Significantly reduces file sizes and enables adding new adapters
without touching core code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/adapters/codex-local/config-fields.tsx

@@ -0,0 +1,51 @@
+import type { AdapterConfigFieldsProps } from "../types";
+import {
+  ToggleField,
+  help,
+} from "../../components/agent-config-primitives";
+
+export function CodexLocalConfigFields({
+  isCreate,
+  values,
+  set,
+  config,
+  eff,
+  mark,
+}: AdapterConfigFieldsProps) {
+  return (
+    <>
+      <ToggleField
+        label="Bypass sandbox"
+        hint={help.dangerouslyBypassSandbox}
+        checked={
+          isCreate
+            ? values!.dangerouslyBypassSandbox
+            : eff(
+                "adapterConfig",
+                "dangerouslyBypassApprovalsAndSandbox",
+                config.dangerouslyBypassApprovalsAndSandbox !== false,
+              )
+        }
+        onChange={(v) =>
+          isCreate
+            ? set!({ dangerouslyBypassSandbox: v })
+            : mark("adapterConfig", "dangerouslyBypassApprovalsAndSandbox", v)
+        }
+      />
+      <ToggleField
+        label="Enable search"
+        hint={help.search}
+        checked={
+          isCreate
+            ? values!.search
+            : eff("adapterConfig", "search", !!config.search)
+        }
+        onChange={(v) =>
+          isCreate
+            ? set!({ search: v })
+            : mark("adapterConfig", "search", v)
+        }
+      />
+    </>
+  );
+}