fix: Refresh widgets tab dynamically when switching to it

ISSUE: Widgets tab was built once at startup. If a plugin was installed
after the app started, the widget wouldn't show up until restart.

FIX:
1. Added _refresh_widgets_tab() method that rebuilds the tab content
2. Called _refresh_widgets_tab() when switching to Widgets tab
3. Added debug logging to show registered widgets count
4. Lists all found widgets in console for debugging

Now when you:
1. Install Clock Widget plugin
2. Click on 🎨 Widgets tab
3. The tab refreshes and shows the Clock Widget

The widget appears immediately without needing to restart!

core/overlay_window.py

@@ -1554,6 +1554,10 @@ class OverlayWindow(QMainWindow):
         tab_index = {'plugins': 0, 'widgets': 1, 'settings': 2}
         if tab_id in tab_index:
             self.tab_stack.setCurrentIndex(tab_index[tab_id])
+            
+        # Refresh widgets tab when switching to it
+        if tab_id == 'widgets':
+            self._refresh_widgets_tab()
     
     def _create_plugins_tab(self) -> QWidget:
         """Create the plugins tab content."""
@@ -1644,6 +1648,93 @@ class OverlayWindow(QMainWindow):
         
         return tab
     
+    def _refresh_widgets_tab(self):
+        """Refresh the widgets tab content dynamically."""
+        # Find the widgets tab and clear/rebuild it
+        if hasattr(self, 'widgets_tab') and self.widgets_tab:
+            # Clear existing layout
+            layout = self.widgets_tab.layout()
+            if layout:
+                # Remove all widgets
+                while layout.count():
+                    item = layout.takeAt(0)
+                    if item.widget():
+                        item.widget().deleteLater()
+            else:
+                # Create new layout
+                from PyQt6.QtWidgets import QVBoxLayout
+                layout = QVBoxLayout(self.widgets_tab)
+                layout.setContentsMargins(24, 24, 24, 24)
+                layout.setSpacing(16)
+            
+            c = get_all_colors()
+            
+            # Rebuild header
+            header = QLabel("🎨 Widgets")
+            header.setStyleSheet(f"""
+                font-size: 24px;
+                font-weight: {EU_TYPOGRAPHY['weight_bold']};
+                color: {c['text_primary']};
+            """)
+            layout.addWidget(header)
+            
+            # Description
+            desc = QLabel("Add overlay widgets to your game. Install plugins to get more widgets.")
+            desc.setStyleSheet(f"color: {c['text_secondary']}; font-size: 12px;")
+            desc.setWordWrap(True)
+            layout.addWidget(desc)
+            
+            # Get registered widgets
+            from core.widget_registry import get_widget_registry
+            registry = get_widget_registry()
+            widgets = registry.get_all_widgets()
+            
+            print(f"[Overlay] Refreshing widgets tab - found {len(widgets)} widgets")
+            for w in widgets:
+                print(f"  - {w.name} (from {w.plugin_id})")
+            
+            if widgets:
+                # Available widgets section
+                available_header = QLabel("Available Widgets")
+                available_header.setStyleSheet(f"""
+                    color: {c['text_primary']};
+                    font-weight: {EU_TYPOGRAPHY['weight_bold']};
+                    font-size: 14px;
+                    margin-top: 16px;
+                    padding-bottom: 8px;
+                    border-bottom: 1px solid {c['border_default']};
+                """)
+                layout.addWidget(available_header)
+                
+                # Create buttons for each registered widget
+                for widget_info in widgets:
+                    widget_btn = self._create_widget_button(
+                        f"{widget_info.icon} {widget_info.name}",
+                        widget_info.description,
+                        lambda wid=widget_info.id: self._add_registered_widget(wid)
+                    )
+                    layout.addWidget(widget_btn)
+            else:
+                # No widgets available
+                no_widgets = QLabel("No widgets available")
+                no_widgets.setStyleSheet(f"""
+                    color: {c['text_muted']};
+                    font-size: 14px;
+                    font-style: italic;
+                    margin-top: 24px;
+                """)
+                no_widgets.setAlignment(Qt.AlignmentFlag.AlignCenter)
+                layout.addWidget(no_widgets)
+                
+                # Install info
+                install_info = QLabel("Install plugins from the Plugin Store to add widgets here.")
+                install_info.setStyleSheet(f"color: {c['text_muted']}; font-size: 12px;")
+                install_info.setWordWrap(True)
+                install_info.setAlignment(Qt.AlignmentFlag.AlignCenter)
+                layout.addWidget(install_info)
+            
+            layout.addStretch()
+    
     def _create_widget_button(self, name: str, description: str, callback) -> QFrame:
         """Create a widget button card."""
         c = get_all_colors()