feat(ai-tools): omp shared + OpenCode/omp sessions, tokens, subagents; Grok hooks; resume by id

- omp-usage.js / opencode-usage.js: poll each CLI's own session store into
  sessions (tool omp/opencode), token_usage per model and subagent agents;
  transcript routes read them (omp journals, OpenCode's opencode.db).
- Grok runs the Claude hooks in ~/.claude/settings.json: its hooks are now
  recognised (hookEventName + workspaceRoot), tagged tool=grok, and their
  transcript_path dropped instead of being parsed as a Claude transcript.
- Catalog `resumeById`: omp/Grok/Cursor `--resume <id>`, OpenCode
  `--session <id>`; session ids may carry `_`. The client offers Resume for
  any tool that resumes by id.
- Kimi Code and GitHub Copilot leave the catalog (their session stores could
  not be verified).

server/routes/hooks.js

@@ -1458,7 +1458,33 @@ function antigravityHookInput(hookType, data) {
   return null;
 }
 
-const HOOK_TOOLS = { codex: codexHookInput, antigravity: antigravityHookInput };
+/**
+ * A Grok Build (`grok`) hook. Grok runs the hooks in `~/.claude/settings.json`
+ * itself (its Claude compatibility, on by default), so AgentHub's own Claude
+ * hook reaches here with no `tool` — told apart by the camelCase keys only
+ * Grok sends beside Claude's snake_case aliases (`hookEventName`,
+ * `workspaceRoot`). Its `transcript_path` is Grok's file, never a Claude
+ * transcript, so it is dropped before anything could parse it.
+ */
+const isGrokPayload = (data) =>
+  !!data &&
+  typeof data === "object" &&
+  typeof data.hookEventName === "string" &&
+  typeof data.workspaceRoot === "string";
+
+function grokHookInput(hookType, data) {
+  if (typeof data.session_id !== "string" || !data.session_id) return null;
+  const d = { ...data };
+  delete d.transcript_path;
+  delete d.agent_transcript_path;
+  return { hookType, data: d };
+}
+
+const HOOK_TOOLS = {
+  codex: codexHookInput,
+  antigravity: antigravityHookInput,
+  grok: grokHookInput,
+};
 
 /**
  * Record which session a dashboard pane holds. The pane's CLI inherits
@@ -1524,9 +1550,14 @@ function ingestHook(body, pushSource = null, peer = { kind: "host" }) {
   }
   const ignored = { status: 200, body: { ok: true, ignored: true } };
   // Which CLI sent it: `codex` from Codex's hooks (codex-hooks.js),
-  // `antigravity` from agy's (antigravity-hooks.js), anything else is Claude
+  // `antigravity` from agy's (antigravity-hooks.js), `grok` for Grok running
+  // the Claude hooks (by its payload's own keys), anything else is Claude
   // Code — an allowlist, never a value stored as sent.
-  const tool = Object.hasOwn(HOOK_TOOLS, body.tool) ? body.tool : "claude";
+  const tool = Object.hasOwn(HOOK_TOOLS, body.tool)
+    ? body.tool
+    : isGrokPayload(data)
+      ? "grok"
+      : "claude";
   if (tool !== "claude") {
     if (!data || typeof data !== "object") return ignored;
     require("../lib/hook-auth").dropForeignPaths(peer, data);