Major UI overhaul: bigger icons, creative inventory tabs, grouped smelting, alerts popup, analytics, mod icons

- Inventory: Bigger item icons (48px) filling their slots, MC-style hover tooltips
- Creative inventory category tabs (All/Blocks/Tools/Combat/Food/Redstone/Materials/Misc)
- Smelting recipes grouped by output item with collapsible sections
- Alerts moved from full tab to popup overlay triggered from header bell icon
- New Analytics tab with SVG charts (storage over time, top items, item trend lookup)
- Mod icon support for ComputerCraft (CC:Tweaked) via GitHub CDN fallback
- Server: new /api/history-summary endpoint for aggregate storage history
- Store: fetchHistorySummary and fetchItemHistory for analytics data

web/server/db.js

@@ -124,6 +124,13 @@ const getItemHistory = db.prepare(`
   LIMIT ?
 `);
 
+const getHistorySummaryStmt = db.prepare(`
+  SELECT recorded_at as recordedAt, SUM(count) as total
+  FROM item_history
+  GROUP BY recorded_at
+  ORDER BY recorded_at ASC
+`);
+
 // Cleanup old history (keep last 7 days)
 const cleanupHistory = db.prepare(`
   DELETE FROM item_history WHERE recorded_at < ?
@@ -292,6 +299,13 @@ export function getHistory(itemName, limit = 100) {
   return getItemHistory.all(itemName, limit);
 }
 
+/**
+ * Get aggregate total item count over time
+ */
+export function getHistorySummary() {
+  return getHistorySummaryStmt.all();
+}
+
 /**
  * Load the full last-known inventory state from DB
  */