feat: add total cost display to HUD

- Add show_total_cost config option (enabled by default)
- Add total cost row between P/L and cost metrics
- Add Total Cost checkbox to settings dialog
- Update window size calculation for total cost row
- Update _refresh_display to show total cost

ui/hud_overlay_clean.py

@@ -38,6 +38,7 @@ class HUDConfig:
     show_session_time: bool = True
     show_profit_loss: bool = True
     show_return_pct: bool = True
+    show_total_cost: bool = True  # NEW: Total cost display
     show_cost_breakdown: bool = False  # Weapon/Armor/Heal costs
     show_combat_stats: bool = False    # Kills, Globals, DPP
     show_damage_stats: bool = False    # Damage dealt/taken
@@ -52,6 +53,7 @@ class HUDConfig:
             'show_session_time': self.show_session_time,
             'show_profit_loss': self.show_profit_loss,
             'show_return_pct': self.show_return_pct,
+            'show_total_cost': self.show_total_cost,
             'show_cost_breakdown': self.show_cost_breakdown,
             'show_combat_stats': self.show_combat_stats,
             'show_damage_stats': self.show_damage_stats,
@@ -67,6 +69,7 @@ class HUDConfig:
             show_session_time=data.get('show_session_time', True),
             show_profit_loss=data.get('show_profit_loss', True),
             show_return_pct=data.get('show_return_pct', True),
+            show_total_cost=data.get('show_total_cost', True),
             show_cost_breakdown=data.get('show_cost_breakdown', False),
             show_combat_stats=data.get('show_combat_stats', False),
             show_damage_stats=data.get('show_damage_stats', False),
@@ -174,6 +177,10 @@ class HUDSettingsDialog(QDialog):
         self.cb_return.setChecked(self.config.show_return_pct)
         form.addRow(self.cb_return)
         
+        self.cb_total_cost = QCheckBox("Total Cost")
+        self.cb_total_cost.setChecked(self.config.show_total_cost)
+        form.addRow(self.cb_total_cost)
+        
         self.cb_cost_metrics = QCheckBox("Cost per Shot/Hit/Heal")
         self.cb_cost_metrics.setChecked(self.config.show_cost_metrics)
         form.addRow(self.cb_cost_metrics)
@@ -229,6 +236,7 @@ class HUDSettingsDialog(QDialog):
         self.config.show_session_time = self.cb_time.isChecked()
         self.config.show_profit_loss = self.cb_profit.isChecked()
         self.config.show_return_pct = self.cb_return.isChecked()
+        self.config.show_total_cost = self.cb_total_cost.isChecked()
         self.config.show_cost_metrics = self.cb_cost_metrics.isChecked()
         self.config.show_gear_info = self.cb_gear.isChecked()
         self.config.show_cost_breakdown = self.cb_cost_breakdown.isChecked()
@@ -399,6 +407,19 @@ class HUDOverlay(QWidget):
             
             layout.addWidget(core_frame)
         
+        # === TOTAL COST (if enabled) ===
+        if self.hud_config.show_total_cost:
+            total_cost_frame = QFrame()
+            total_cost_layout = QHBoxLayout(total_cost_frame)
+            total_cost_layout.setContentsMargins(0, 0, 0, 0)
+            
+            self.total_cost_label = QLabel("Cost: 0.00 PED")
+            self.total_cost_label.setStyleSheet("font-size: 14px; color: #FFAAAA;")
+            total_cost_layout.addWidget(self.total_cost_label)
+            total_cost_layout.addStretch()
+            
+            layout.addWidget(total_cost_frame)
+        
         # === COST METRICS (if enabled) ===
         if self.hud_config.show_cost_metrics:
             metrics_frame = QFrame()
@@ -495,6 +516,8 @@ class HUDOverlay(QWidget):
             height += 70
         if self.hud_config.show_profit_loss or self.hud_config.show_return_pct:
             height += 40
+        if self.hud_config.show_total_cost:
+            height += 25
         if self.hud_config.show_cost_metrics:
             height += 30
         if self.hud_config.show_cost_breakdown:
@@ -613,6 +636,10 @@ class HUDOverlay(QWidget):
             self.return_label.setText(f"{ret:.1f}%")
             self.return_label.setStyleSheet(f"font-size: 16px; font-weight: bold; color: {color};")
         
+        # Total Cost
+        if hasattr(self, 'total_cost_label'):
+            self.total_cost_label.setText(f"Cost: {self._stats.cost_total:.2f} PED")
+        
         # Cost metrics
         if hasattr(self, 'cps_label'):
             self.cps_label.setText(f"Shot: {self._stats.cost_per_shot:.4f}")