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/codex-local/parse.ts

@@ -0,0 +1,47 @@
+import { asString, asNumber, parseObject, parseJson } from "../utils.js";
+
+export function parseCodexJsonl(stdout: string) {
+  let sessionId: string | null = null;
+  const messages: string[] = [];
+  const usage = {
+    inputTokens: 0,
+    cachedInputTokens: 0,
+    outputTokens: 0,
+  };
+
+  for (const rawLine of stdout.split(/\r?\n/)) {
+    const line = rawLine.trim();
+    if (!line) continue;
+
+    const event = parseJson(line);
+    if (!event) continue;
+
+    const type = asString(event.type, "");
+    if (type === "thread.started") {
+      sessionId = asString(event.thread_id, sessionId ?? "") || sessionId;
+      continue;
+    }
+
+    if (type === "item.completed") {
+      const item = parseObject(event.item);
+      if (asString(item.type, "") === "agent_message") {
+        const text = asString(item.text, "");
+        if (text) messages.push(text);
+      }
+      continue;
+    }
+
+    if (type === "turn.completed") {
+      const usageObj = parseObject(event.usage);
+      usage.inputTokens = asNumber(usageObj.input_tokens, usage.inputTokens);
+      usage.cachedInputTokens = asNumber(usageObj.cached_input_tokens, usage.cachedInputTokens);
+      usage.outputTokens = asNumber(usageObj.output_tokens, usage.outputTokens);
+    }
+  }
+
+  return {
+    sessionId,
+    summary: messages.join("\n\n").trim(),
+    usage,
+  };
+}