Fix: Standardize Electron bridge and implement robust caching

- Refactored all IPC methods and parameters to snake_case for consistency with SvelteKit.
- Implemented exhaustive background caching engine with download locking.
- Reverted to legacy-proven flat hash storage pattern (hash.file).
- Added axios for reliable stream-based binary downloads.
- Updated preload and main handlers to support recursive room data fetching.

dist/main/index.js

@@ -37,6 +37,8 @@ const electron_1 = require("electron");
 const path = __importStar(require("path"));
 const config_loader_1 = require("./config_loader");
 const api_client_1 = require("./api_client");
+const shell_handlers_1 = require("./shell_handlers");
+const file_handlers_1 = require("./file_handlers");
 let mainWindow = null;
 let cachedSeed = null;
 let cachedFullConfig = null;
@@ -57,13 +59,12 @@ async function createWindow() {
         },
     });
     // Determine target URL based on hydrated config
-    let targetUrl = 'http://demo.localhost:5173'; // Default Dev Fallback
+    let targetUrl = 'http://demo.localhost:5173';
     if (cachedFullConfig && cachedFullConfig.native_device) {
         const device = cachedFullConfig.native_device;
         const eventId = device.event_id_random || device.event_id;
         const locationId = device.event_location_id_random || device.event_location_id || '';
         const host = device.app_base_url || 'demo.localhost:5173';
-        // In development, we likely want to stick to localhost even if app_base_url is set
         const useHost = (host.includes('localhost')) ? host : 'demo.localhost:5173';
         targetUrl = `http://${useHost}/events/${eventId}/launcher/${locationId}`;
     }
@@ -76,6 +77,9 @@ async function createWindow() {
         mainWindow = null;
     });
 }
+// Register OS-level handlers
+(0, shell_handlers_1.registerShellHandlers)();
+(0, file_handlers_1.registerFileHandlers)();
 electron_1.app.on('ready', createWindow);
 electron_1.app.on('window-all-closed', () => {
     if (process.platform !== 'darwin') {