Fix URI malformed error from browser extensions

Fix the suppressURIErrorPlugin to properly handle malformed URIs from
browser extensions without throwing errors.

Changes:
- Move next() outside try block to only call for valid URLs
- Return 200 OK instead of 400 for malformed URIs
- Early return to prevent further processing of bad requests

Fixes errors appearing on every page load from browser extension requests.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/frontend/vite.config.js

@@ -13,13 +13,14 @@ function suppressURIErrorPlugin() {
 					if (req.url) {
 						decodeURI(req.url);
 					}
-					next();
 				} catch (e) {
-					// Silently handle malformed URIs
-					res.writeHead(400);
-					res.end('Bad Request');
+					// Silently ignore malformed URIs from browser extensions
+					// Don't call next(), just end the response
+					res.writeHead(200, { 'Content-Type': 'text/plain' });
+					res.end('OK');
 					return;
 				}
+				next();
 			});
 		}
 	};