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/lib/jsonl-tail.js

@@ -0,0 +1,36 @@
+/**
+ * @file Reads what an append-only JSONL journal gained since a byte offset —
+ * the incremental read a session-journal poller does (omp-usage.js). Only
+ * complete lines are returned: one still being written
+ * stays for the next pass. Every open goes through `openSafeAsync`, so a
+ * member's journal (S3) is read only when it is a regular file they own,
+ * never through a link.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+
+const CHUNK = 8 * 1024 * 1024; // read per file per pass; the rest waits for the next
+
+/**
+ * The complete lines written between `offset` and `size`: `{lines, offset}`.
+ * A chunk with no newline at all (one line over CHUNK) is skipped whole.
+ */
+async function readNew(file, offset, size, { chunk = CHUNK } = {}) {
+  const fh = await require("./run-as").openSafeAsync(file);
+  try {
+    const len = Math.min(size - offset, chunk);
+    if (len <= 0) return { lines: [], offset };
+    const buf = Buffer.alloc(len);
+    let got = 0;
+    for (let n; got < len; got += n) {
+      ({ bytesRead: n } = await fh.read(buf, got, len - got, offset + got));
+      if (!n) break;
+    }
+    const end = got ? buf.lastIndexOf(0x0a, got - 1) : -1;
+    if (end === -1) return { lines: [], offset: got === chunk ? offset + got : offset };
+    return { lines: buf.toString("utf8", 0, end).split("\n"), offset: offset + end + 1 };
+  } finally {
+    await fh.close();
+  }
+}
+
+module.exports = { readNew };