diff --git a/web/server/server.js b/web/server/server.js
index e9f3374..e395e20 100644
--- a/web/server/server.js
+++ b/web/server/server.js
@@ -285,11 +285,31 @@ function updateStateFromBridge(data) {
   if (data.cache) {
     // Normalize itemList: Lua sends { name, total }, frontend expects { name, count }
     const rawItems = data.cache.itemList || [];
-    const normalizedItems = rawItems.map(item => ({
-      name: item.name,
+    const normalizedItems = Array.isArray(rawItems) ? rawItems.map(item => ({
+      name: item.name || '',
       count: item.total !== undefined ? item.total : (item.count || 0),
-      displayName: item.displayName || item.name,
-    }));
+      displayName: item.displayName || item.name || '',
+    })) : [];
+
+    // Normalize furnaceStatus: Lua sends array of { name, type, input, fuel, output, active }
+    // Frontend expects object { furnaceName: { active, input, fuel, output } }
+    const rawFurnaces = data.cache.furnaceStatus || [];
+    let normalizedFurnaces = {};
+    if (Array.isArray(rawFurnaces)) {
+      rawFurnaces.forEach(f => {
+        if (f && f.name) {
+          normalizedFurnaces[f.name] = {
+            active: f.active || false,
+            type: f.type || 'minecraft:furnace',
+            input: f.input || null,
+            fuel: f.fuel || null,
+            output: f.output || null,
+          };
+        }
+      });
+    } else if (typeof rawFurnaces === 'object') {
+      normalizedFurnaces = rawFurnaces;
+    }
 
     inventoryState = {
       itemList: normalizedItems,
@@ -302,16 +322,49 @@ function updateStateFromBridge(data) {
       dropperOk: data.cache.dropperOk || false,
       barrelOk: data.cache.barrelOk || false,
       furnaceCount: data.cache.furnaceCount || 0,
-      furnaceStatus: data.cache.furnaceStatus || {},
+      furnaceStatus: normalizedFurnaces,
     };
   }
-  
-  if (data.activity !== undefined) activityState = data.activity;
-  if (data.alerts !== undefined) alertsState = data.alerts;
+
+  if (data.activity !== undefined) activityState = data.activity || {};
+
+  // Normalize alerts: Lua sends [{ label, current, min }] (only triggered ones)
+  // Frontend expects [{ item, triggered, current, threshold }]
+  if (data.alerts !== undefined) {
+    const rawAlerts = data.alerts || [];
+    alertsState = Array.isArray(rawAlerts) ? rawAlerts.map(a => ({
+      item: a.name || a.item || a.label || '',
+      triggered: true,
+      current: a.current || 0,
+      threshold: a.min || a.threshold || 0,
+    })) : [];
+  }
+
   if (data.smeltingPaused !== undefined) smeltingPaused = data.smeltingPaused;
-  if (data.disabledRecipes !== undefined) disabledRecipes = data.disabledRecipes;
-  if (data.smeltable !== undefined) smeltableRecipes = data.smeltable;
-  if (data.craftable !== undefined) craftableRecipes = data.craftable;
+  if (data.disabledRecipes !== undefined) disabledRecipes = data.disabledRecipes || {};
+  if (data.smeltable !== undefined) smeltableRecipes = data.smeltable || {};
+
+  // Normalize craftable: Lua sends { output, count, grid } (grid = flat array of 9)
+  // Frontend expects { output, count, slots } (slots = object { slotIdx: itemName })
+  if (data.craftable !== undefined) {
+    const rawCraftable = data.craftable || [];
+    craftableRecipes = Array.isArray(rawCraftable) ? rawCraftable.map(recipe => {
+      const slots = {};
+      if (recipe.grid && Array.isArray(recipe.grid)) {
+        recipe.grid.forEach((item, idx) => {
+          if (item) slots[idx + 1] = item;
+        });
+      } else if (recipe.slots) {
+        Object.assign(slots, recipe.slots);
+      }
+      return {
+        output: recipe.output || '',
+        count: recipe.count || 1,
+        slots,
+      };
+    }) : [];
+  }
+
   if (data.craftTurtleOk !== undefined) craftTurtleOk = data.craftTurtleOk;
   
   lastUpdate = Date.now();