Inventory: per-player items backbone (DR-026 Phase 0)

Data-driven ItemDatabase catalog + per-player replicated InventorySlot ([GhostField] OwnerSendType.All, a StatModifier twin). Harvest reroutes to the firing player's personal inventory (optional ComponentLookup<GhostOwner> in ResourceHarvestSystem; remainder/un-owned -> ledger); the G-key InventoryDepositRequest RPC moves the bag into the shared ledger the build economy spends. Catalog asset (Aether/Ore/Biomass + Stone Pickaxe) wired into the Gameplay subscene; read-only HUD inventory panel. ushort ItemId subsumes ResourceId; byte Category/Tier baked for gear-tier progression. Session-only (no SaveData bump).

Play-validated host+client: catalog baked into both worlds, the re-baked player ghost carries InventorySlot with a clean handshake, a server write replicates to the client owner, the deposit RPC round-trips, and the HUD renders catalog names. See DR-026.

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

Assets/_Project/Scripts/Client/Presentation/HudSystem.cs

@@ -70,6 +70,9 @@ namespace ProjectM.Client
         VisualElement _vignette, _downed;
         float _prevHp, _flash;
         bool _haveHp;
+        // personal inventory panel (read-only; toggled with I)
+        VisualElement _invPanel, _invList;
+        bool _invOpen;
 
         EntityQuery _huskQuery;
 
@@ -290,6 +293,35 @@ namespace ProjectM.Client
                 _vignette.style.display = DisplayStyle.None;
                 _downed.style.display = DisplayStyle.None;
             }
+            // ---- Personal inventory (read-only; toggle with I, deposit-all with G via InventoryDepositSendSystem) ----
+            var invKb = UnityEngine.InputSystem.Keyboard.current;
+            if (invKb != null && invKb.iKey.wasPressedThisFrame) _invOpen = !_invOpen;
+            if (_invOpen && found)
+            {
+                EntityManager.CompleteDependencyBeforeRO<InventorySlot>();
+                bool haveItemDb = SystemAPI.TryGetSingleton<ItemDatabase>(out var itemDb);
+                _invPanel.style.display = DisplayStyle.Flex;
+                _invList.Clear();
+                int shown = 0;
+                foreach (var bag in SystemAPI.Query<DynamicBuffer<InventorySlot>>()
+                             .WithAll<GhostOwnerIsLocal, PlayerTag>())
+                {
+                    for (int i = 0; i < bag.Length; i++)
+                    {
+                        var slot = bag[i];
+                        if (slot.ItemId == 0 || slot.Count <= 0) continue;
+                        AddInvRow(ItemName(haveItemDb, itemDb, slot.ItemId), ItemTint(slot.ItemId), slot.Count);
+                        shown++;
+                    }
+                    break;
+                }
+                if (shown == 0)
+                    _invList.Add(HudUi.Text("(empty)", 13, MenuUi.SubCol, TextAnchor.MiddleLeft));
+            }
+            else
+            {
+                _invPanel.style.display = DisplayStyle.None;
+            }
         }
 
         // ---- per-frame helpers ----
@@ -467,6 +499,7 @@ namespace ProjectM.Client
             BuildPaletteRow(root);
             BuildHintBar(root);
             BuildDowned(root);
+            BuildInventory(root);
         }
 
         void BuildVignette(VisualElement root)
@@ -724,6 +757,67 @@ namespace ProjectM.Client
             root.Add(_downed);
         }
 
+        void BuildInventory(VisualElement root)
+        {
+            _invPanel = HudUi.Panel(PanelDark);
+            _invPanel.style.position = Position.Absolute;
+            _invPanel.style.right = 40; _invPanel.style.bottom = 40;
+            _invPanel.style.minWidth = 224;
+            _invPanel.style.paddingLeft = 14; _invPanel.style.paddingRight = 14;
+            _invPanel.style.paddingTop = 10; _invPanel.style.paddingBottom = 10;
+            _invPanel.style.alignItems = Align.FlexStart;
+            _invPanel.pickingMode = PickingMode.Ignore;
+
+            var header = HudUi.Display("INVENTORY", 16, AetherCyan, TextAnchor.MiddleLeft);
+            header.style.marginBottom = 6;
+            _invPanel.Add(header);
+
+            _invList = new VisualElement();
+            _invList.pickingMode = PickingMode.Ignore;
+            _invPanel.Add(_invList);
+
+            var hint = HudUi.Text("I close   -   G deposit all at base", 11, MenuUi.SubCol, TextAnchor.MiddleLeft);
+            hint.style.marginTop = 8;
+            _invPanel.Add(hint);
+
+            _invPanel.style.display = DisplayStyle.None;
+            root.Add(_invPanel);
+        }
+
+        void AddInvRow(string name, Color tint, int count)
+        {
+            var row = new VisualElement();
+            row.style.flexDirection = FlexDirection.Row;
+            row.style.justifyContent = Justify.SpaceBetween;
+            row.style.minWidth = 196;
+            row.style.marginTop = 2;
+            row.pickingMode = PickingMode.Ignore;
+            row.Add(HudUi.Text(name, 13, tint, TextAnchor.MiddleLeft));
+            row.Add(HudUi.Display("x" + count, 13, Color.white, TextAnchor.MiddleRight));
+            _invList.Add(row);
+        }
+
+        static string ItemName(bool haveDb, ItemDatabase db, ushort id)
+        {
+            if (haveDb && db.Value.IsCreated)
+            {
+                ref var blob = ref db.Value.Value;
+                if (blob.TryGetItem(id, out var def)) return def.Name.ToString();
+            }
+            if (id == ResourceId.Aether) return "Aether";
+            if (id == ResourceId.Ore) return "Ore";
+            if (id == ResourceId.Biomass) return "Biomass";
+            return "Item " + id;
+        }
+
+        static Color ItemTint(ushort id)
+        {
+            if (id == ResourceId.Aether) return AetherCyan;
+            if (id == ResourceId.Ore) return OreAmber;
+            if (id == ResourceId.Biomass) return BioGreen;
+            return new Color(0.85f, 0.85f, 0.9f);
+        }
+
         static Color ResourceTint(byte resId)
             => resId == ResourceId.Aether ? AetherCyan : resId == ResourceId.Biomass ? BioGreen : OreAmber;