Wire thing templates and inventory into server startup

Loads thing templates from content/things/ at startup. Registers
get/drop/inventory commands via things module import. Reconstructs
player inventory from saved template names on login, with graceful
fallback for unknown templates.

src/mudlib/server.py

@@ -22,6 +22,7 @@ import mudlib.commands.play
 import mudlib.commands.quit
 import mudlib.commands.reload
 import mudlib.commands.spawn
+import mudlib.commands.things
 from mudlib.caps import parse_mtts
 from mudlib.combat.commands import register_combat_commands
 from mudlib.combat.engine import process_combat
@@ -30,6 +31,8 @@ from mudlib.effects import clear_expired
 from mudlib.if_session import broadcast_to_spectators
 from mudlib.mob_ai import process_mobs
 from mudlib.mobs import load_mob_templates, mob_templates
+from mudlib.thing import Thing
+from mudlib.things import load_thing_templates, spawn_thing, thing_templates
 from mudlib.player import Player, players
 from mudlib.resting import process_resting
 from mudlib.store import (
@@ -264,6 +267,7 @@ async def shell(
             "max_stamina": 100.0,
             "flying": False,
             "zone_name": "overworld",
+            "inventory": [],
         }
 
     # Resolve zone from zone_name (currently only overworld exists)
@@ -302,6 +306,20 @@ async def shell(
         reader=_reader,
     )
 
+    # Reconstruct inventory from saved data
+    for item_name in player_data.get("inventory", []):
+        template = thing_templates.get(item_name)
+        if template:
+            spawn_thing(template, player)
+        else:
+            # Template not found — create a bare Thing so it's not lost
+            log.warning(
+                "unknown thing template '%s' for player '%s'",
+                item_name,
+                player_name,
+            )
+            Thing(name=item_name, location=player)
+
     # Parse and store client capabilities from MTTS
     ttype3 = _writer.get_extra_info("ttype3")
     player.caps = parse_mtts(ttype3)
@@ -465,6 +483,13 @@ async def run_server() -> None:
         mob_templates.update(loaded)
         log.info("loaded %d mob templates from %s", len(loaded), mobs_dir)
 
+    # Load thing templates
+    things_dir = pathlib.Path(__file__).resolve().parents[2] / "content" / "things"
+    if things_dir.exists():
+        loaded_things = load_thing_templates(things_dir)
+        thing_templates.update(loaded_things)
+        log.info("loaded %d thing templates from %s", len(loaded_things), things_dir)
+
     # connect_maxwait: how long to wait for telnet option negotiation (CHARSET
     # etc) before starting the shell. default is 4.0s which is painful.
     # MUD clients like tintin++ reject CHARSET immediately via MTTS, but