Fix blank page issue and implement working chart

## Fixed Issues:
- ✅ Resolved blank page caused by problematic chart component imports
- ✅ Removed broken chart components that had library compatibility issues
- ✅ Created SimpleChart component using HTML5 Canvas that works reliably
- ✅ Cleaned up test pages and unused components

## Working Features:
- ✅ Trading page loads correctly without blank screen
- ✅ Professional candlestick chart with grid lines and price labels
- ✅ Clean trading interface with all panels visible
- ✅ No more loading errors or component failures

## Technical Implementation:
- Used native HTML5 Canvas API for chart rendering
- Proper TypeScript types and error handling
- Responsive design that works in Docker environment
- No external library dependencies to cause conflicts

The trading dashboard is now stable and functional.

app/trading/page.js

@@ -4,7 +4,7 @@ import TradeExecutionPanel from '../../components/TradeExecutionPanel.js'
 import PositionsPanel from '../../components/PositionsPanel.js'
 import PendingOrdersPanel from '../../components/PendingOrdersPanel.js'
 import TradesHistoryPanel from '../../components/TradesHistoryPanel.js'
-import SimpleTradingChart from '../../components/SimpleTradingChart'
+import SimpleChart from '../../components/SimpleChart'
 
 export default function TradingPage() {
   return (
@@ -22,7 +22,7 @@ export default function TradingPage() {
             <span>1D</span>
           </div>
         </div>
-        <SimpleTradingChart symbol="SOL/USDC" positions={[]} />
+        <SimpleChart symbol="SOL/USDC" positions={[]} />
       </div>
 
       <div className="grid grid-cols-1 xl:grid-cols-2 gap-8">