feat: Add adaptive leverage controls to settings UI

Complete implementation of adaptive leverage configuration via web interface:

Frontend (app/settings/page.tsx):
- Added 4 fields to TradingSettings interface:
  * USE_ADAPTIVE_LEVERAGE: boolean
  * HIGH_QUALITY_LEVERAGE: number
  * LOW_QUALITY_LEVERAGE: number
  * QUALITY_LEVERAGE_THRESHOLD: number

- Added complete Adaptive Leverage section with:
  * Purple-themed informational box explaining quality-based leverage
  * Toggle switch for enabling/disabling (🎯 Enable Adaptive Leverage)
  * Number inputs for high leverage (1-20), low leverage (1-20), threshold (80-100)
  * Visual tier display showing leverage multipliers and position sizes
  * Dynamic calculation based on $560 free collateral

Backend (app/api/settings/route.ts):
- GET handler: Load 4 adaptive leverage fields from environment variables
- POST handler: Save 4 adaptive leverage fields to .env file
- Proper type conversion (boolean from 'true', numbers from parseInt/parseFloat)

Visual Tier Display Example:
 Below Threshold: Blocked (no trade)

Changes enable users to adjust leverage settings via web UI instead of
manually editing .env file and restarting container.

app/api/settings/route.ts

@@ -127,6 +127,12 @@ export async function GET() {
       MIN_SIGNAL_QUALITY_SCORE_SHORT: parseInt(env.MIN_SIGNAL_QUALITY_SCORE_SHORT || env.MIN_SIGNAL_QUALITY_SCORE || '60'),
       SLIPPAGE_TOLERANCE: parseFloat(env.SLIPPAGE_TOLERANCE || '1.0'),
       DRY_RUN: env.DRY_RUN === 'true',
+      
+      // Adaptive Leverage (Dec 1, 2025)
+      USE_ADAPTIVE_LEVERAGE: env.USE_ADAPTIVE_LEVERAGE === 'true',
+      HIGH_QUALITY_LEVERAGE: parseFloat(env.HIGH_QUALITY_LEVERAGE || '5'),
+      LOW_QUALITY_LEVERAGE: parseFloat(env.LOW_QUALITY_LEVERAGE || '1'),
+      QUALITY_LEVERAGE_THRESHOLD: parseInt(env.QUALITY_LEVERAGE_THRESHOLD || '95'),
     }
     
     return NextResponse.json(settings)
@@ -196,6 +202,12 @@ export async function POST(request: NextRequest) {
       MIN_SIGNAL_QUALITY_SCORE_SHORT: settings.MIN_SIGNAL_QUALITY_SCORE_SHORT.toString(),
       SLIPPAGE_TOLERANCE: settings.SLIPPAGE_TOLERANCE.toString(),
       DRY_RUN: settings.DRY_RUN.toString(),
+      
+      // Adaptive Leverage (Dec 1, 2025)
+      USE_ADAPTIVE_LEVERAGE: settings.USE_ADAPTIVE_LEVERAGE.toString(),
+      HIGH_QUALITY_LEVERAGE: settings.HIGH_QUALITY_LEVERAGE.toString(),
+      LOW_QUALITY_LEVERAGE: settings.LOW_QUALITY_LEVERAGE.toString(),
+      QUALITY_LEVERAGE_THRESHOLD: settings.QUALITY_LEVERAGE_THRESHOLD.toString(),
     }
     
     const success = updateEnvFile(updates)

app/settings/page.tsx

@@ -55,6 +55,12 @@ interface TradingSettings {
   MIN_ADX_INCREASE: number
   MAX_PRICE_POSITION_FOR_SCALE: number
   
+  // Adaptive Leverage (Quality-based)
+  USE_ADAPTIVE_LEVERAGE: boolean
+  HIGH_QUALITY_LEVERAGE: number
+  LOW_QUALITY_LEVERAGE: number
+  QUALITY_LEVERAGE_THRESHOLD: number
+  
   // Safety
   MAX_DAILY_DRAWDOWN: number
   MAX_TRADES_PER_HOUR: number
@@ -468,6 +474,79 @@ export default function SettingsPage() {
             />
           </Section>
 
+          {/* Adaptive Leverage */}
+          <Section title="⚡ Adaptive Leverage" description="Quality-based dynamic leverage adjustment">
+            <div className="mb-4 p-3 bg-purple-500/10 border border-purple-500/30 rounded-lg">
+              <p className="text-sm text-purple-400">
+                Automatically adjust leverage based on signal quality score. High-quality signals get more leverage for maximum profit, borderline signals use lower leverage for risk management.
+              </p>
+            </div>
+            <div className="flex items-center justify-between p-4 bg-slate-700/30 rounded-lg mb-4">
+              <div className="flex-1">
+                <div className="text-white font-medium mb-1">🎯 Enable Adaptive Leverage</div>
+                <div className="text-slate-400 text-sm">
+                  Dynamically adjust leverage based on signal quality
+                </div>
+              </div>
+              <button
+                onClick={() => updateSetting('USE_ADAPTIVE_LEVERAGE', !settings.USE_ADAPTIVE_LEVERAGE)}
+                className={`relative inline-flex h-8 w-14 items-center rounded-full transition-colors ${
+                  settings.USE_ADAPTIVE_LEVERAGE ? 'bg-green-500' : 'bg-slate-600'
+                }`}
+              >
+                <span
+                  className={`inline-block h-6 w-6 transform rounded-full bg-white transition-transform ${
+                    settings.USE_ADAPTIVE_LEVERAGE ? 'translate-x-7' : 'translate-x-1'
+                  }`}
+                />
+              </button>
+            </div>
+            <Setting
+              label="High Quality Leverage"
+              value={settings.HIGH_QUALITY_LEVERAGE}
+              onChange={(v) => updateSetting('HIGH_QUALITY_LEVERAGE', v)}
+              min={1}
+              max={20}
+              step={1}
+              description={`Leverage for exceptional signals (Quality ${settings.QUALITY_LEVERAGE_THRESHOLD}+ LONG, 90+ SHORT). Current: ${settings.HIGH_QUALITY_LEVERAGE}x leverage.`}
+            />
+            <Setting
+              label="Low Quality Leverage"
+              value={settings.LOW_QUALITY_LEVERAGE}
+              onChange={(v) => updateSetting('LOW_QUALITY_LEVERAGE', v)}
+              min={1}
+              max={20}
+              step={1}
+              description={`Leverage for borderline signals (Quality 90-${settings.QUALITY_LEVERAGE_THRESHOLD-1} LONG, 80-89 SHORT). Current: ${settings.LOW_QUALITY_LEVERAGE}x leverage.`}
+            />
+            <Setting
+              label="Quality Threshold"
+              value={settings.QUALITY_LEVERAGE_THRESHOLD}
+              onChange={(v) => updateSetting('QUALITY_LEVERAGE_THRESHOLD', v)}
+              min={80}
+              max={100}
+              step={1}
+              description="Minimum quality score for high-quality leverage tier (applies to LONG signals, SHORT uses 90+)."
+            />
+            <div className="p-4 bg-slate-700/50 rounded-lg">
+              <div className="text-sm text-slate-300 mb-2">Leverage Tiers (with $560 collateral)</div>
+              <div className="space-y-2 text-xs">
+                <div className="flex justify-between">
+                  <span className="text-slate-400">🔥 High Quality (Q{settings.QUALITY_LEVERAGE_THRESHOLD}+ LONG, Q90+ SHORT):</span>
+                  <span className="text-green-400 font-bold">{settings.HIGH_QUALITY_LEVERAGE}x = ${(560 * settings.HIGH_QUALITY_LEVERAGE).toFixed(0)} position</span>
+                </div>
+                <div className="flex justify-between">
+                  <span className="text-slate-400">📊 Low Quality (Q90-{settings.QUALITY_LEVERAGE_THRESHOLD-1} LONG, Q80-89 SHORT):</span>
+                  <span className="text-yellow-400 font-bold">{settings.LOW_QUALITY_LEVERAGE}x = ${(560 * settings.LOW_QUALITY_LEVERAGE).toFixed(0)} position</span>
+                </div>
+                <div className="flex justify-between">
+                  <span className="text-slate-400">❌ Below Threshold:</span>
+                  <span className="text-red-400 font-bold">Blocked (no trade)</span>
+                </div>
+              </div>
+            </div>
+          </Section>
+
           {/* Risk Management */}
           <Section title="🛡️ Risk Management" description="Stop loss and take profit levels">
             <Setting