fix: vite config and routes to support no slashes, and api interceptor for fetch (#3824)

* Fix vite config and routes to support no slashes

* Added fetch intercept to add custom headers into fetch calls

src/frontend/package-lock.json

@@ -48,6 +48,7 @@
         "elkjs": "^0.9.3",
         "emoji-regex": "^10.3.0",
         "esbuild": "^0.21.5",
+        "fetch-intercept": "^2.4.0",
         "file-saver": "^2.0.5",
         "framer-motion": "^11.2.10",
         "fuse.js": "^7.0.0",
@@ -8617,6 +8618,12 @@
         "node": "^12.20 || >= 14.13"
       }
     },
+    "node_modules/fetch-intercept": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/fetch-intercept/-/fetch-intercept-2.4.0.tgz",
+      "integrity": "sha512-BPZ2LM9Dh1ua2ovQf03N6rhWg1qxdVD5qK/G4llvcemt6M+jjxCuIDxJ+6IiG+uz//3UQmgfKEv0gOGvYIxZ7g==",
+      "license": "MIT"
+    },
     "node_modules/fetch-retry": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/fetch-retry/-/fetch-retry-6.0.0.tgz",