Shell: \d PATTERN describes instead of listing relations

Symptom

Help text documents \d[+] [PATTERN] with * / ? wildcards for listing relations. Any non-empty argument takes the describe path ('::regclass'), so pattern forms fail with “relation does not exist” instead of listing.

Examples:

• \d user* — should list matching relations; currently describe
• \d * — same
• \dt user* — correctly lists (control)

Exact names like \d users should still describe.

Red loop (already run)

import { expandMeta } from './components/shell/meta.ts';
expandMeta('\\d user*').kind; // got "describe", expect "query"
expandMeta('\\dt user*').kind; // "query" (ok)

Where

• components/shell/meta.ts — case "\\d": any arg → kind: "describe"; no pattern vs name branch
• Help copy in the same file advertises PATTERN support

Notes

Diagnosed with /diagnosing-bugs. Fix should treat args containing * / ? (and possibly bare patterns) as list queries, matching \dt / \dv behaviour.

Start in components/shell/meta.ts at the case "\d" branch and inspect expandMeta, comparing it with the \dt and \dv handling. Re-run the supplied expandMeta examples, then verify that wildcard arguments produce query behavior, exact names still produce describe behavior, and the existing \dt behavior remains unchanged.