Add z item management menu with transfer and yes/no confirmation

docs/controls.md

@@ -31,7 +31,7 @@ This document is the authoritative keymap for the client.
 - `O`: Edit item properties
 - `Shift+O`: Inspect all item properties
 - `D`: Pick up/drop item
-- `Shift+D`: Delete item
+- `Z`: Item management menu (delete/transfer when permitted)
 - `Enter`: Use item
 - `Shift+Enter`: Secondary item action
 
@@ -82,6 +82,12 @@ Applies to effect select, user/item list modes, item selection, item property li
 - `Space`: Read tooltip/help for current option (where metadata is available)
 - First-letter navigation: jump to next matching entry
 
+## Yes/No Confirmation Menu
+
+- `ArrowUp` / `ArrowDown`: Move between `No` and `Yes`
+- `Enter`: Confirm current choice (default selection is `No`)
+- `Escape`: Cancel
+
 ## Admin Modes
 
 - `Shift+Z`: Open admin menu

docs/item-schema.md

@@ -243,7 +243,7 @@
 {
   "type": "item_action_result",
   "ok": true,
-  "action": "add | pickup | drop | delete | use | update",
+  "action": "add | pickup | drop | delete | transfer | use | secondary_use | update",
   "message": "human-readable status",
   "itemId": "optional-item-id"
 }

docs/protocol-notes.md

@@ -27,6 +27,7 @@ This is a behavior guide for packet semantics beyond raw schemas.
 - `chat_message`: player chat.
 - `ping`: latency measurement.
 - `item_add`, `item_pickup`, `item_drop`, `item_delete`, `item_use`, `item_update`: item actions.
+- `item_transfer`: transfer item ownership to another connected user.
 - `item_secondary_use`: trigger type-specific secondary action when implemented.
 - `item_piano_note`: realtime piano note on/off for active piano use mode.
 - `item_piano_recording`: piano record/playback control (`toggle_record`, `playback`, `stop_playback`).
@@ -59,6 +60,7 @@ This is a behavior guide for packet semantics beyond raw schemas.
 - `item_upsert` is full-state replacement for one item, not partial patch.
 - `item_upsert.item.display` is server-owned display text for readonly/system properties (for example: `createdBy`, `updatedBy`, `createdAt`, `updatedAt`, `capabilities`, `useSound`, `emitSound`).
 - `item_action_result` messages are intended for direct screen-reader/user status feedback.
+  - `action` includes: `add`, `pickup`, `drop`, `delete`, `transfer`, `use`, `secondary_use`, `update`
 - Successful `item_pickup` and `item_drop` also emit system chat lines to other users in the room.
 - Piano runtime control no longer depends on parsing `item_action_result.message` text.
 - `item_piano_status` carries machine-readable piano events (`use_mode_entered`, record/playback transitions).