adventure: a click-through page for every adventurer on the board

Each roster name becomes /adventure/who/{token}. Anyone sees the public sheet —
stats and equipped gear, decoded from the detail_json gogobee now hangs on each
board entry — with a live JSON re-poll so an open tab tracks HP and room as they
move. The signed-in owner sees the same page enriched with their private
inventory, vault, house, and pets, unlocked by an ownership join in the new
player_self_detail table (localpart owns token) — Pete never reverses the
anonymous token to decide it. buyerLocalpart is extracted so the storefront and
the ownership check lowercase the session name the same way.

internal/storage/schema.go

@@ -111,6 +111,24 @@ CREATE TABLE IF NOT EXISTS mischief_tiers (
     ordinal    INTEGER NOT NULL DEFAULT 0
 );
 
+-- A player's private, owner-only expansion — inventory, vault, house, pets —
+-- pushed whole by gogobee on the roster tick. Keyed by localpart (== session
+-- Username), a *separate keyspace* from the anonymous roster tokens on purpose:
+-- like user_euro, it is only ever served back to the one authenticated user it
+-- belongs to, never on the public board. token is that player's current roster
+-- token, kept here so the detail page can prove owner↔page by a join without
+-- ever reversing the one-way token — the association lives only in this
+-- owner-private table and never reaches any public response. detail_json is the
+-- {inventory, vault, house, pets} body; it is replaced wholesale each tick, so a
+-- player who drops out of gogobee's push loses their stale self-view.
+CREATE TABLE IF NOT EXISTS player_self_detail (
+    localpart   TEXT PRIMARY KEY,
+    token       TEXT NOT NULL,
+    detail_json TEXT NOT NULL,
+    snapshot_at INTEGER NOT NULL DEFAULT 0
+);
+CREATE INDEX IF NOT EXISTS idx_player_self_detail_token ON player_self_detail(token);
+
 CREATE TABLE IF NOT EXISTS post_log (
     id            INTEGER PRIMARY KEY AUTOINCREMENT,
     guid          TEXT NOT NULL,