feat: Enhance drag interception with dynamic URL pattern matching configuration injection

src/webdrop_bridge/ui/main_window.py

@@ -408,6 +408,7 @@ class MainWindow(QMainWindow):
         before any page scripts that might interfere with drag events.
         
         Embeds qwebchannel.js inline to avoid CSP issues with qrc:// URLs.
+        Injects configuration that bridge script uses for dynamic URL pattern matching.
         """
         from PySide6.QtCore import QFile, QIODevice
         
@@ -427,6 +428,9 @@ class MainWindow(QMainWindow):
         else:
             logger.warning("Failed to load qwebchannel.js from resources")
         
+        # Generate configuration injection script
+        config_code = self._generate_config_injection_script()
+        
         # Load bridge script from file
         # Using intercept script - prevents browser drag, hands off to Qt
         script_path = Path(__file__).parent / "bridge_script_intercept.js"
@@ -444,11 +448,8 @@ class MainWindow(QMainWindow):
             except (OSError, IOError) as e:
                 logger.warning(f"Download interceptor not found: {e}")
             
-            # Combine qwebchannel.js + bridge script + download interceptor (inline to avoid CSP)
-            if qwebchannel_code:
-                combined_code = qwebchannel_code + "\n\n" + bridge_code
-            else:
-                combined_code = bridge_code
+            # Combine: qwebchannel.js + config + bridge script + download interceptor
+            combined_code = qwebchannel_code + "\n\n" + config_code + "\n\n" + bridge_code
             
             if download_interceptor_code:
                 combined_code += "\n\n" + download_interceptor_code
@@ -459,6 +460,41 @@ class MainWindow(QMainWindow):
         except (OSError, IOError) as e:
             logger.warning(f"Failed to load bridge script: {e}")
     
+    def _generate_config_injection_script(self) -> str:
+        """Generate JavaScript code that injects configuration.
+        
+        Creates a script that sets window.webdropConfig with the current
+        URL mappings, allowing the bridge script to dynamically check
+        against configured patterns instead of hardcoded values.
+        
+        Returns:
+            JavaScript code as string
+        """
+        # Convert URL mappings to format expected by bridge script
+        mappings = []
+        for mapping in self.config.url_mappings:
+            mappings.append({
+                "url_prefix": mapping.url_prefix,
+                "local_path": mapping.local_path
+            })
+        
+        # Generate JavaScript code
+        config_js = """
+(function() {
+    // WebDrop Bridge - Configuration Injection
+    window.webdropConfig = """ + json.dumps({
+            "urlMappings": mappings
+        }) + """;
+    console.log('[WebDrop Config] Injected configuration with', 
+                window.webdropConfig.urlMappings.length, 'URL mappings');
+    for (var i = 0; i < window.webdropConfig.urlMappings.length; i++) {
+        var m = window.webdropConfig.urlMappings[i];
+        console.log('[WebDrop Config] Mapping', (i+1) + ':', m.url_prefix, '→', m.local_path);
+    }
+})();
+"""
+        return config_js
+    
     def _inject_drag_bridge(self, html_content: str) -> str:
         """Return HTML content unmodified.