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/db.js

@@ -1429,6 +1429,41 @@ db.exec(`
   );
 `);
 
+// Which Oh My Pi session journals have been read, how far, and what they said
+// so far (server/lib/omp-usage.js) — journals only grow, so each is read on
+// from `offset`; the same "deleted stays deleted" rule.
+db.exec(`
+  CREATE TABLE IF NOT EXISTS omp_sessions (
+    path TEXT PRIMARY KEY,
+    session_id TEXT NOT NULL,
+    agent TEXT NOT NULL DEFAULT '',
+    size INTEGER NOT NULL DEFAULT 0,
+    mtime_ms INTEGER NOT NULL DEFAULT 0,
+    offset INTEGER NOT NULL DEFAULT 0,
+    state TEXT NOT NULL DEFAULT '{}',
+    title TEXT,
+    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+  );
+  CREATE INDEX IF NOT EXISTS idx_omp_sessions_session ON omp_sessions(session_id);
+`);
+
+// Which OpenCode stores have been read at what mtime, and per root session the
+// newest `time_updated` written (server/lib/opencode-usage.js) — the same
+// "deleted stays deleted" rule.
+db.exec(`
+  CREATE TABLE IF NOT EXISTS opencode_stores (
+    path TEXT PRIMARY KEY,
+    mtime_ms INTEGER NOT NULL DEFAULT 0,
+    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+  );
+  CREATE TABLE IF NOT EXISTS opencode_sessions (
+    session_id TEXT PRIMARY KEY,
+    store TEXT NOT NULL,
+    time_updated INTEGER NOT NULL DEFAULT 0,
+    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+  );
+`);
+
 // Which Cursor agent transcripts have been read, at what mtime
 // (server/lib/cursor-usage.js) — the same "deleted stays deleted" rule.
 db.exec(`