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/server.js

@@ -5,7 +5,7 @@ import { createServer } from 'http';
 import {
   loadFullState, saveFullState, recordItemHistory,
   saveItems, saveFurnaces, saveAlerts, saveState,
-  getHistory, closeDb, flushPendingSave,
+  getHistory, getHistorySummary, closeDb, flushPendingSave,
 } from './db.js';
 
 const app = express();
@@ -118,6 +118,12 @@ app.get('/api/history/:itemName', (req, res) => {
   res.json({ item: req.params.itemName, history });
 });
 
+// Get aggregate storage history (total items over time)
+app.get('/api/history-summary', (req, res) => {
+  const summary = getHistorySummary();
+  res.json({ history: summary });
+});
+
 // Get recipes (smeltable + craftable)
 app.get('/api/recipes', (req, res) => {
   res.json({