Fix typos

ui/store.ts

@@ -177,7 +177,7 @@ export async function xhrRequest(
       const err = new Error();
       err["message"] =
         xhr.status === 0
-          ? "Server is unrachable"
+          ? "Server is unreachable"
           : `Unexpected response status code ${xhr.status}`;
       err["code"] = xhr.status;
       err["response"] = xhr.responseText;
@@ -388,7 +388,7 @@ function _fulfill(
               extract: (xhr) => {
                 if (xhr.status === 403) throw new Error("Not authorized");
                 if (!xhr.status) {
-                  throw new Error("Server is unrachable");
+                  throw new Error("Server is unreachable");
                 } else if (xhr.status !== 200) {
                   throw new Error(
                     `Unexpected response status code ${xhr.status}`
@@ -608,6 +608,7 @@ export function postTasks(
     body: tasks,
     extract: (xhr) => {
       if (xhr.status === 403) throw new Error("Not authorized");
+      if (!xhr.status) throw new Error("Server is unreachable");
       if (xhr.status !== 200) throw new Error(xhr.response);
       const connectionRequestStatus = xhr.getResponseHeader(
         "Connection-Request"
@@ -679,7 +680,7 @@ export function resourceExists(resource: string, id: string): Promise<number> {
       }),
     extract: (xhr) => {
       if (xhr.status === 403) throw new Error("Not authorized");
-      if (!xhr.status) throw new Error("Server is unrachable");
+      if (!xhr.status) throw new Error("Server is unreachable");
       else if (xhr.status !== 200)
         throw new Error(`Unexpected response status code ${xhr.status}`);
       return +xhr.getResponseHeader("x-total-count");