feat(shard): Protocol 2.0 cross-links — titles, guild, governor, houses

Phase 3: surface the new board data on existing character/user pages.

- Character sheet: render the char.profile titles block (fame/karma + skill +
  selected reward title; numeric clilocs skipped since the site has no cliloc
  table yet), plus "Guildmaster" and "Governor of <city>" chips.
- Char profile enrichment (player/admin /shard/char/:serial, one shared path):
  attach guild + governorOf from our own boards. Guild is LEADERSHIP-ONLY — it's
  verifiable from current board state, whereas guessing membership from stale
  guild.join events risks showing a wrong guild, so we return null instead.
- Admin user detail (/admin/users/:id): new "Standing" section (governorships
  held + guilds led) via GET /users/:id/shard/standing; Houses rows now show the
  registry fields (decay level, placement price, co-owner/friend counts) already
  returned by listHousesForAccounts.

Server 179/179, client build clean, swagger regenerated.

Refs .plans/protocol2-integration.md (Phase 3).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/src/model/shardState/shardState.db.js

@@ -189,6 +189,28 @@ const removeGuild = (id) => query('DELETE FROM shard_guilds WHERE id = ?', [id])
 const clearGuilds = () => query('DELETE FROM shard_guilds')
 const listGuilds = () => query(`SELECT ${GUILD_COLS} FROM shard_guilds ORDER BY name ASC`)
 
+// The guild an actor LEADS — matched on the current board (leader_serial or the
+// linked leader_acct), so it reflects live state. Guild MEMBERSHIP for non-leaders
+// is not modelled (the board carries only counts + leader), so we don't guess it.
+const findGuildLedByActor = (serial, acct) =>
+  query(
+    `SELECT id, name, abbr, alliance, leader_name FROM shard_guilds
+      WHERE leader_serial = ? OR (leader_acct IS NOT NULL AND leader_acct = ?)
+      LIMIT 1`,
+    [serial ?? null, acct ?? null],
+  )
+
+// Guilds led by any of the given game accounts (admin: a user's linked accounts).
+const listGuildsLedByAccounts = (accounts) =>
+  accounts.length === 0
+    ? Promise.resolve([])
+    : query(
+        `SELECT id, name, abbr, alliance, leader_name FROM shard_guilds
+          WHERE leader_acct IN (${accounts.map(() => '?').join(', ')})
+          ORDER BY name ASC`,
+        accounts,
+      )
+
 // ── Governor board + term history (Protocol 2.0) ───────────────────────────
 const GOV_COLS =
   'city, governor_serial, governor_name, governor_acct, governor_web_id, elect_serial, elect_name, elect_acct, election_phase, candidates, auto_pick_at, payload, t, updated_at'
@@ -286,6 +308,8 @@ module.exports = {
   removeGuild,
   clearGuilds,
   listGuilds,
+  findGuildLedByActor,
+  listGuildsLedByAccounts,
   upsertGovernor,
   listGovernors,
   listGovernorshipsByAccounts,