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>

server/src/adapters/process/execute.ts

@@ -0,0 +1,77 @@
+import type { AdapterExecutionContext, AdapterExecutionResult } from "../types.js";
+import {
+  asString,
+  asNumber,
+  asStringArray,
+  parseObject,
+  buildPaperclipEnv,
+  redactEnvForLogs,
+  runChildProcess,
+} from "../utils.js";
+
+export async function execute(ctx: AdapterExecutionContext): Promise<AdapterExecutionResult> {
+  const { runId, agent, config, onLog, onMeta } = ctx;
+  const command = asString(config.command, "");
+  if (!command) throw new Error("Process adapter missing command");
+
+  const args = asStringArray(config.args);
+  const cwd = asString(config.cwd, process.cwd());
+  const envConfig = parseObject(config.env);
+  const env: Record<string, string> = { ...buildPaperclipEnv(agent) };
+  for (const [k, v] of Object.entries(envConfig)) {
+    if (typeof v === "string") env[k] = v;
+  }
+
+  const timeoutSec = asNumber(config.timeoutSec, 900);
+  const graceSec = asNumber(config.graceSec, 15);
+
+  if (onMeta) {
+    await onMeta({
+      adapterType: "process",
+      command,
+      cwd,
+      commandArgs: args,
+      env: redactEnvForLogs(env),
+    });
+  }
+
+  const proc = await runChildProcess(runId, command, args, {
+    cwd,
+    env,
+    timeoutSec,
+    graceSec,
+    onLog,
+  });
+
+  if (proc.timedOut) {
+    return {
+      exitCode: proc.exitCode,
+      signal: proc.signal,
+      timedOut: true,
+      errorMessage: `Timed out after ${timeoutSec}s`,
+    };
+  }
+
+  if ((proc.exitCode ?? 0) !== 0) {
+    return {
+      exitCode: proc.exitCode,
+      signal: proc.signal,
+      timedOut: false,
+      errorMessage: `Process exited with code ${proc.exitCode ?? -1}`,
+      resultJson: {
+        stdout: proc.stdout,
+        stderr: proc.stderr,
+      },
+    };
+  }
+
+  return {
+    exitCode: proc.exitCode,
+    signal: proc.signal,
+    timedOut: false,
+    resultJson: {
+      stdout: proc.stdout,
+      stderr: proc.stderr,
+    },
+  };
+}

server/src/adapters/process/index.ts

@@ -0,0 +1,8 @@
+import type { ServerAdapterModule } from "../types.js";
+import { execute } from "./execute.js";
+
+export const processAdapter: ServerAdapterModule = {
+  type: "process",
+  execute,
+  models: [],
+};