chore: match asset protocol handling in electron to tauris impl

Author: abose

src-electron/main.js

@@ -266,7 +266,11 @@ app.whenReady().then(async () => {
         try {
             const url = new URL(request.url);
             // Decode the path from URL encoding
-            const requestedPath = decodeURIComponent(url.pathname.substring(1)); // Remove leading /
+            let requestedPath = decodeURIComponent(url.pathname);
+            // On Windows, URL pathname has extra leading / before drive letter (e.g., /C:/...)
+            if (/^\/[A-Z]:/i.test(requestedPath)) {
+                requestedPath = requestedPath.substring(1);
+            }
             const normalizedRequested = path.normalize(requestedPath);
             const normalizedAssetsDir = path.normalize(assetsDir);
 

src-electron/preload.js

@@ -71,7 +71,9 @@ contextBridge.exposeInMainWorld('electronAPI', {
         if (!platformPath) return null;
         // Normalize path separators to forward slashes for URL
         const normalizedPath = platformPath.replace(/\\/g, '/');
-        return `asset://localhost/${encodeURIComponent(normalizedPath)}`;
+        // Encode each path segment individually to preserve URL path structure (like Tauri's convertFileSrc)
+        const encodedPath = normalizedPath.split('/').map(segment => encodeURIComponent(segment)).join('/');
+        return `asset://localhost${encodedPath}`;
     },
 
     // Set zoom factor on the webview (mirrors Tauri's zoom_window)