feat: live table roster — seat_players / unseat_player + HUD card

The missing backbone for read tracking: a place for "who's at the table" to live.
When Brian reads the table off Bravo (handles like TAG), Lyra registers them as
seated this session; reads/TAGs then attach to those players by handle instead of
spawning duplicates or getting missed.

- session_players table; seat_player/seat_players/unseat_player/session_roster;
  _resolve_or_create_player (shared name/descriptor resolution, dedupe guard).
- tools seat_players (accepts objects or a plain name list) + unseat_player.
- HUD gains `roster`; Session page shows a 🪑 Table card (seat, handle, category,
  read count, last read).
- Cash card: capture the roster when he names the table; a Bravo handle like TAG
  is a PERSON, seated as a player — never the tight-aggressive style.

5 tests. Full suite 162 green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/web/static/session.html

@@ -265,6 +265,7 @@
       const stack = data.stack || {};
       const timeline = data.timeline || [];
       const hands = data.hands || [];
+      const roster = data.roster || [];
       const villains = data.villains || [];
       const notes = data.notes || [];
       const stats = data.stats || {};
@@ -369,6 +370,19 @@
             : '<p class="empty">No scars logged — mistakes to study land here.</p>'}
         </div>
 
+        <div class="card">
+          <p class="label">🪑 Table (${roster.length})</p>
+          ${roster.length ? `<ul class="rows">${roster.map(v => `
+            <li class="villain">
+              ${v.seat ? `<span class="cat">${esc(v.seat)}</span> ` : ''}<b>${esc(v.name)}</b>
+              ${v.category ? `<span class="cat">[${esc(v.category)}]</span>` : ''}
+              ${v.reads ? `<span class="cat">· ${v.reads} read${v.reads===1?'':'s'}</span>` : ''}
+              <button class="mini" title="Rename / fix" onclick="renamePlayer(${v.id}, '${esc(v.name||'').replace(/'/g,"\\'")}')">✎</button>
+              ${v.last_note ? `<div class="note-meta">“${esc(v.last_note)}”</div>` : ''}
+            </li>`).join('')}</ul>`
+            : '<p class="empty">No roster yet — tell Lyra who\\'s at the table.</p>'}
+        </div>
+
         <div class="card">
           <p class="label">Villains seen</p>
           ${villains.length ? `<ul class="rows">${villains.map(v => `