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/poker.py

@@ -150,6 +150,17 @@ CREATE TABLE IF NOT EXISTS identity_queue (
     created_at TEXT NOT NULL
 );
 CREATE INDEX IF NOT EXISTS idx_idq_status ON identity_queue(status);
+
+-- Who is seated at the table THIS session — the live roster Brian reads off Bravo
+-- at the start. Reads/TAGs attach to these players by handle; active=0 when they leave.
+CREATE TABLE IF NOT EXISTS session_players (
+    session_id INTEGER NOT NULL,
+    player_id INTEGER NOT NULL,
+    seat TEXT,
+    active INTEGER NOT NULL DEFAULT 1,
+    created_at TEXT NOT NULL,
+    PRIMARY KEY (session_id, player_id)
+);
 """
 
 # Below this many observed hands, don't surface % stats (too small a sample).
@@ -267,7 +278,7 @@ def delete_session(session_id: int) -> dict:
     counts: dict[str, int] = {}
     with conn:
         for t in ("poker_hands", "player_observations", "player_reads",
-                  "poker_stack_log", "poker_rituals"):
+                  "poker_stack_log", "poker_rituals", "session_players"):
             counts[t] = conn.execute(
                 f"SELECT COUNT(*) n FROM {t} WHERE session_id = ?", (session_id,)
             ).fetchone()["n"]
@@ -1803,6 +1814,100 @@ def timeline(session_id: int | None = None) -> list[dict]:
     return events
 
 
+def _resolve_or_create_player(name: str | None = None, descriptor: str | None = None,
+                              venue: str | None = None, category: str | None = None) -> int | None:
+    """Turn a name-or-descriptor into a player id, matching an existing villain when
+    confident. A description mistakenly given as a name is routed to the descriptor
+    path so it dedupes (same guard add_read uses)."""
+    if name and not descriptor and _looks_like_description(name):
+        descriptor, name = name, None
+    if name:
+        return upsert_player(name, venue=venue, category=category)
+    if descriptor:
+        res = resolve_villain(descriptor, venue=venue)
+        if res["band"] in ("name", "high") and res["match_id"]:
+            add_descriptor(res["match_id"], descriptor)
+            return res["match_id"]
+        return create_descriptor_villain(descriptor, venue=venue, category=category)
+    return None
+
+
+def seat_player(name: str | None = None, descriptor: str | None = None, seat: str | None = None,
+                category: str | None = None, session_id: int | None = None) -> int | None:
+    """Seat one player at the live table (add to the roster). Idempotent per session."""
+    sid = _resolve(session_id)
+    if sid is None:
+        raise ValueError("no live session")
+    venue = (get_session(sid) or {}).get("venue")
+    pid = _resolve_or_create_player(name=name, descriptor=descriptor, venue=venue, category=category)
+    if pid is None:
+        return None
+    conn = _c()
+    with conn:
+        conn.execute(
+            "INSERT INTO session_players (session_id, player_id, seat, active, created_at) "
+            "VALUES (?, ?, ?, 1, ?) ON CONFLICT(session_id, player_id) DO UPDATE SET "
+            "active = 1, seat = COALESCE(excluded.seat, session_players.seat)",
+            (sid, pid, seat, _now()),
+        )
+    return pid
+
+
+def seat_players(players: list, session_id: int | None = None) -> int:
+    """Seat a whole table at once. Each item is a name string or a dict with
+    name/descriptor/seat/category. Returns how many were seated."""
+    n = 0
+    for p in players or []:
+        if isinstance(p, str):
+            ok = seat_player(name=p, session_id=session_id)
+        elif isinstance(p, dict):
+            ok = seat_player(name=p.get("name"), descriptor=p.get("descriptor"),
+                             seat=p.get("seat"), category=p.get("category"), session_id=session_id)
+        else:
+            ok = None
+        if ok:
+            n += 1
+    return n
+
+
+def unseat_player(name: str | None = None, descriptor: str | None = None,
+                  session_id: int | None = None) -> bool:
+    """Mark a seated player as gone (busted/left). Keeps their reads/history."""
+    sid = _resolve(session_id)
+    if sid is None:
+        return False
+    ref = name or descriptor or ""
+    res = resolve_villain(ref, venue=(get_session(sid) or {}).get("venue"), session_id=sid)
+    pid = res.get("match_id")
+    if pid is None:
+        return False
+    conn = _c()
+    with conn:
+        conn.execute("UPDATE session_players SET active = 0 WHERE session_id = ? AND player_id = ?",
+                     (sid, pid))
+    return True
+
+
+def session_roster(session_id: int | None = None) -> list[dict]:
+    """The live table roster: seated players with seat, dossier, and their latest
+    read this session. This is 'who's at the table right now'."""
+    sid = _resolve(session_id)
+    if sid is None:
+        return []
+    rows = _c().execute(
+        "SELECT sp.seat AS seat, p.id AS id, p.name AS name, p.named AS named, "
+        "p.category AS category, p.tendencies AS tendencies, "
+        "(SELECT note FROM player_reads r WHERE r.player_id = p.id AND r.session_id = ? "
+        " ORDER BY r.id DESC LIMIT 1) AS last_note, "
+        "(SELECT COUNT(*) FROM player_reads r2 WHERE r2.player_id = p.id AND r2.session_id = ?) AS reads "
+        "FROM session_players sp JOIN poker_players p ON p.id = sp.player_id "
+        "WHERE sp.session_id = ? AND sp.active = 1 "
+        "ORDER BY CASE WHEN sp.seat IS NULL THEN 1 ELSE 0 END, sp.seat, p.name",
+        (sid, sid, sid),
+    ).fetchall()
+    return [dict(r) for r in rows]
+
+
 def _session_villains(sid: int) -> list[dict]:
     """Players read this session, with their standing dossier fields."""
     rows = _c().execute(
@@ -1878,6 +1983,7 @@ def hud(session_id: int | None = None) -> dict | None:
             "log": log,
         },
         "hands": hands,
+        "roster": session_roster(sid),
         "villains": _session_villains(sid),
         "timeline": timeline(sid),
         "notes": notes,