feat(db): add multi-ID show and --brief flag to ticket CLI

ticket show now accepts multiple IDs (e.g. ticket show 110 111 112).
--brief flag outputs compact human-readable summaries instead of JSON,
useful for sprint planning scans. Single-ID JSON output unchanged.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/connectors/ticket

@@ -141,28 +141,72 @@ def cmd_list(conn, args):
     out({"ok": True, "count": len(rows), "rows": rows})
 
 
-def cmd_show(conn, ticket_id):
-    rows = query(conn, """SELECT t.*, p.title as parent_title
-                          FROM tickets t LEFT JOIN tickets p ON t.parent_id = p.id
-                          WHERE t.id = ?""", (ticket_id,))
-    if not rows:
-        out({"ok": False, "error": f"Ticket #{ticket_id} not found"})
-        return
-    ticket = rows[0]
-    # Get children
-    children = query(conn, "SELECT id, title, status, priority FROM tickets WHERE parent_id = ? ORDER BY id", (ticket_id,))
-    # Get dependencies (what blocks this)
-    blockers = query(conn, """SELECT t.id, t.title, t.status FROM ticket_deps d
-                              JOIN tickets t ON d.blocker_id = t.id
-                              WHERE d.blocked_id = ?""", (ticket_id,))
-    # Get dependents (what this blocks)
-    blocks = query(conn, """SELECT t.id, t.title, t.status FROM ticket_deps d
-                            JOIN tickets t ON d.blocked_id = t.id
-                            WHERE d.blocker_id = ?""", (ticket_id,))
-    ticket["children"] = children
-    ticket["blocked_by"] = blockers
-    ticket["blocks"] = blocks
-    out({"ok": True, "ticket": ticket})
+def cmd_show(conn, ids, brief=False):
+    tickets = []
+    for ticket_id in ids:
+        rows = query(conn, """SELECT t.*, p.title as parent_title
+                              FROM tickets t LEFT JOIN tickets p ON t.parent_id = p.id
+                              WHERE t.id = ?""", (ticket_id,))
+        if not rows:
+            tickets.append({"id": ticket_id, "error": f"Ticket #{ticket_id} not found"})
+            continue
+        ticket = rows[0]
+        # Get children
+        children = query(conn, "SELECT id, title, status, priority FROM tickets WHERE parent_id = ? ORDER BY id", (ticket_id,))
+        # Get dependencies (what blocks this)
+        blockers = query(conn, """SELECT t.id, t.title, t.status FROM ticket_deps d
+                                  JOIN tickets t ON d.blocker_id = t.id
+                                  WHERE d.blocked_id = ?""", (ticket_id,))
+        # Get dependents (what this blocks)
+        blocks = query(conn, """SELECT t.id, t.title, t.status FROM ticket_deps d
+                                JOIN tickets t ON d.blocked_id = t.id
+                                WHERE d.blocker_id = ?""", (ticket_id,))
+        ticket["children"] = children
+        ticket["blocked_by"] = blockers
+        ticket["blocks"] = blocks
+        tickets.append(ticket)
+    if brief:
+        _print_brief(tickets)
+    elif len(tickets) == 1:
+        out({"ok": True, "ticket": tickets[0]})
+    else:
+        out({"ok": True, "count": len(tickets), "tickets": tickets})
+
+
+def _print_brief(tickets):
+    for i, t in enumerate(tickets):
+        if "error" in t:
+            print(f"#{t['id']}: NOT FOUND")
+            continue
+        # Header line
+        print(f"#{t['id']}: {t['title']}")
+        # Metadata line
+        parts = [f"{t['type']}", f"P:{t['priority']}", f"S:{t['status']}"]
+        if t.get("assigned_to"):
+            parts.append(f"@{t['assigned_to']}")
+        if t.get("parent_id"):
+            parts.append(f"Epic:#{t['parent_id']} ({t.get('parent_title', '?')})")
+        if t.get("sprint_id"):
+            parts.append(f"Sprint:{t['sprint_id']}")
+        if t.get("decision_ref"):
+            parts.append(f"Ref:{t['decision_ref']}")
+        print(f"  {' | '.join(parts)}")
+        # Description
+        desc = t.get("description") or ""
+        if desc:
+            # Truncate long descriptions
+            if len(desc) > 200:
+                desc = desc[:197] + "..."
+            print(f"  {desc}")
+        # Dependencies
+        if t.get("blocked_by"):
+            blockers = ", ".join(f"#{b['id']} ({b['status']})" for b in t["blocked_by"])
+            print(f"  Blocked by: {blockers}")
+        if t.get("blocks"):
+            blocks = ", ".join(f"#{b['id']}" for b in t["blocks"])
+            print(f"  Blocks: {blocks}")
+        if i < len(tickets) - 1:
+            print()
 
 
 def cmd_done(conn, ids):
@@ -286,7 +330,7 @@ HELP = """ticket — project ticket CLI
 
 Usage:
   ticket list [--status S] [--priority P] [--epic N] [--sprint N] [--assigned A]
-  ticket show <id>                    Full ticket detail with deps and children
+  ticket show [--brief] <id> [<id>...] Full ticket detail (--brief for summary)
   ticket done <id> [<id> ...]         Mark tickets as done
   ticket status <id> <new_status>     Change ticket status
   ticket assign <id> <agent>          Assign ticket to agent/branch
@@ -320,10 +364,12 @@ def main():
         if cmd == "list":
             cmd_list(conn, args)
         elif cmd == "show":
-            if not args:
-                out({"ok": False, "error": "Usage: ticket show <id>"})
+            brief = "--brief" in args
+            id_args = [a for a in args if a != "--brief"]
+            if not id_args:
+                out({"ok": False, "error": "Usage: ticket show [--brief] <id> [<id> ...]"})
             else:
-                cmd_show(conn, int(args[0]))
+                cmd_show(conn, [int(a) for a in id_args], brief=brief)
         elif cmd == "done":
             if not args:
                 out({"ok": False, "error": "Usage: ticket done <id> [<id> ...]"})