refactor(client): delete the UO client half (phase 3, slice 3)

35 files and 5,332 lines out — twelve public pages, seven admin views, two
player views, eight components, the two `data/` leaves and the three `lib/`
ones, plus the two tests that came with them. §2.7.1's estimate of 51 files /
~3,700 lines was measured differently and is corrected in the docs PR.

The seams core keeps, each smaller than what it replaced:

Nine rows leave the public header and six leave the admin sidebar, and both
lists are now free of `feature` gates and of `IconShard`. `moduleTitle` already
handled a module page's heading, so the six TITLES entries and the
`/admin/characters` branch of `sectionTitle` simply go.

`/player` had `PlayerCharacters` as its index — a UO page — and rather than name
a replacement or invent a landing screen it now resolves to the first row of the
portal nav this viewer can reach (`firstDestinationFor`, beside
`allowedPathsFor` and reading the BASE nav for the same reason: an override is
presentation and where everybody lands is behaviour). With the module installed
that is still Characters, so a player's first screen after signing in does not
change. Deliberately generic and deliberately not in the portal layout — the
admin index is the same question with a hardcoded answer, and if the two
logged-in areas ever become one this is what serves both.

`game_account_signup` goes with the rest of core's UO prose: the mode list, the
derived public flag, the validation and a Site Settings field whose help text
named Bridge.cfg. The row itself is untouched and module-uo reads it through
ctx.settings — the data stays, the semantics move.

KNOWN BREAK, accepted by the org lead: the shipped Android app reads
`gameAccountSignup` off `/public/settings` (PublicDto.kt:80). The field has a
`= false` default so nothing crashes; the app silently stops offering
game-account creation until it reads the module's `/public/shard/features`
instead. Out of scope here, recorded in the Android plan, and it lands well
before this workstream's cutover reaches `main`.

620 server + 161 client tests. Manifest 158 public + 2 internal, unchanged;
routes.guards unchanged. The OpenAPI spec loses exactly one property, and only
because it was hand-written in swagger.js — regeneration alone would have left
the spec documenting a field core no longer returns.

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

client/src/routes/admin/AdminLayout.jsx

@@ -43,7 +43,6 @@ const IconKey = () => <Icon><circle cx="8" cy="12" r="4" /><path d="M12 12h9M18
 const IconBot = () => <Icon><rect x="4" y="8" width="16" height="11" rx="2" /><path d="M12 8V4M8 13h.01M16 13h.01M9 17h6" /></Icon>
 const IconPulse = () => <Icon><path d="M3 12h3l2 6 4-14 2 8h7" /></Icon>
 const IconUser = () => <Icon><circle cx="12" cy="8" r="4" /><path d="M4 21a8 8 0 0 1 16 0" /></Icon>
-const IconShard = () => <Icon><path d="M12 2l7 6-7 14-7-14z" /><path d="M5 8h14" /></Icon>
 const IconNav = () => <Icon><path d="M4 6h16M4 12h16M4 18h10" /><circle cx="18" cy="18" r="2.5" /></Icon>
 const IconPalette = () => <Icon><path d="M12 3a9 9 0 1 0 0 18 2 2 0 0 0 1.6-3.2 2 2 0 0 1 1.6-3.2H18a3 3 0 0 0 3-3 9 9 0 0 0-9-8.6z" /><circle cx="7.5" cy="11.5" r="1" /><circle cx="10.5" cy="7.5" r="1" /><circle cx="15" cy="8.5" r="1" /></Icon>
 
@@ -76,8 +75,6 @@ export const NAV = [
     items: [
       { to: '/admin/moderation', label: 'Moderation', icon: IconShield, roles: ['admin', 'moderator'] },
       { to: '/admin/moderation/appeals', label: 'Appeals', icon: IconShield, roles: ['admin', 'moderator'] },
-      { to: '/admin/shard-ops', label: 'In-Game Ops', icon: IconShard, roles: ['admin', 'moderator'] },
-      { to: '/admin/houses', label: 'Houses', icon: IconShard, roles: ['admin', 'moderator'] },
     ],
   },
   {
@@ -91,15 +88,11 @@ export const NAV = [
       { to: '/admin/hero', label: 'Hero Editor', icon: IconHero, roles: ['admin'] },
       { to: '/admin/auth-providers', label: 'Authentication', icon: IconKey, roles: ['admin'] },
       { to: '/admin/discord-bot', label: 'Discord Bot', icon: IconBot, roles: ['admin'] },
-      { to: '/admin/shard', label: 'Shard (uo-link)', icon: IconShard, roles: ['admin'] },
-      { to: '/admin/shard-visibility', label: 'Shard Visibility', icon: IconShard, roles: ['admin'] },
-      { to: '/admin/shard-atlas', label: 'Spawn Atlas', icon: IconShard, roles: ['admin'] },
       { to: '/admin/bot-activity', label: 'Web Bot Activity', icon: IconPulse, roles: ['admin'] },
     ],
   },
   {
     items: [
-      { to: '/admin/characters', label: 'My Characters', icon: IconShard },
       { to: '/admin/account', label: 'Account', icon: IconUser },
     ],
   },
@@ -136,18 +129,12 @@ const TITLES = {
   '/admin/hero': 'Hero Editor',
   '/admin/moderation': 'Moderation',
   '/admin/moderation/appeals': 'Appeals',
-  '/admin/shard-ops': 'In-Game Ops',
-  '/admin/houses': 'House Registry',
   '/admin/settings': 'Site Settings',
   '/admin/appearance': 'Appearance',
   '/admin/navigation': 'Navigation',
   '/admin/activity': 'Activity Log',
   '/admin/bot-activity': 'Web Bot Activity',
   '/admin/discord-bot': 'Discord Bot',
-  '/admin/shard': 'Shard (uo-link)',
-  '/admin/shard-visibility': 'Shard Visibility',
-  '/admin/shard-atlas': 'Spawn Atlas',
-  '/admin/characters': 'My Characters',
   '/admin/auth-providers': 'Authentication',
   '/admin/users': 'Users',
   '/admin/invites': 'Invites',
@@ -170,7 +157,6 @@ function moduleTitle(baseNav, pathname) {
 // Fallback page title for dynamic sub-routes not in the exact-match TITLES map.
 function sectionTitle(pathname) {
   if (pathname.startsWith('/admin/moderation')) return 'Moderation'
-  if (pathname.startsWith('/admin/characters')) return 'My Characters'
   if (pathname.startsWith('/admin/users/')) return 'User'
   return 'Admin'
 }