feat(guilds): a guild detail page, and the slot core puts the feed in

The module's half of the org lead's correction: Teams is the contract, guilds
are the presentation, and the presentation is this module's.

Adds `/uo/guilds/:id` — the detail view the board never had — with the roster
from this module's OWN board, which is the same data it answers core's Team
provider from. Reading core's projection of our own answer back would be a round
trip through a staler copy of it.

The page declares `uo.guild.detail` and core fills it with the Team activity
feed. That is the one part of this page core cannot hand over: only core can
resolve whether the viewer is inside the Team, and the public/members split on
that feed is a security boundary. The guild is named in OUR terms — core maps
its own Team from the module id and the external id — so this module never holds
core's row id or slug.

`TeamOverviewStrip` is deleted with the core Team page it filled.
`team.member.row` is not declared here either: the useful thing to put in a
roster row is a link to the character behind it, and nothing core could supply
identifies one.

`GET /public/shard/guilds/:id` backs the page, gated and projected through the
same `guilds` feature as the board — so an operator who raises that audience
raises this too, and the locked acct/webId fields never survive below admin. A
roster is where those appear in bulk, which makes this the endpoint where
getting the projection wrong would matter most.

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

client/src/routes/public/Guilds.jsx

@@ -1,4 +1,5 @@
 import { useMemo, useState } from 'react'
+import { Link } from 'react-router-dom'
 import { useShardFeed } from '../../lib/useShardFeed.js'
 import api from '../../api.js'
 import { ErrorState, Loading, PageHeader, PublicLayout, useAsync } from '../../core.js'
@@ -15,9 +16,12 @@ function Leader({ leader }) {
 
 function GuildRow({ g }) {
   return (
-    <div
+    // A link now, because the board gained a detail page: the roster and core's
+    // Team activity feed live there (docs/website/TEAMS.md Part 3).
+    <Link
+      to={`/uo/guilds/${encodeURIComponent(g.id)}`}
       className="panel"
-      style={{ padding: '14px 16px', display: 'flex', alignItems: 'center', gap: 14 }}
+      style={{ padding: '14px 16px', display: 'flex', alignItems: 'center', gap: 14, textDecoration: 'none' }}
     >
       <div style={{ minWidth: 0, flex: 1 }}>
         <div style={{ display: 'flex', alignItems: 'baseline', gap: 8, minWidth: 0 }}>
@@ -59,7 +63,7 @@ function GuildRow({ g }) {
           <Leader leader={g.leader} />
         </div>
       </div>
-    </div>
+    </Link>
   )
 }