Otherwise you will get an exception (Unable to contact Wallet Server) eventhough the wallet owner api is running.
Those have been implemented starting commit 88616fd341980d4ef408ecd7cc38a52b0a65db41:
http://localhost:13420/v1/wallet/owner/node_height
http://localhost:13420/v1/wallet/owner/issue_send_tx

Also for full install instruction of the web wallet, those will be required to be able to use angular/ng:
sudo apt install ng-common

npm install -g @angular/cli@latest
npm install --save-dev @angular-devkit/build-angular

You also need to run grin wallet info:
./grin wallet owner_api

On 3b9bd71 build fails, with the below error:

ng build

Date: 2018-07-24T16:10:10.277Z
Hash: 2bd0e938a2655b437886
Time: 4896ms
chunk {main} main.js, main.js.map (main) 626 bytes [initial] [rendered]
chunk {polyfills} polyfills.js, polyfills.js.map (polyfills) 681 bytes [initial] [rendered]
chunk {runtime} runtime.js, runtime.js.map (runtime) 5.22 kB [entry] [rendered]
chunk {styles} styles.js, styles.js.map (styles) 141 kB [initial] [rendered]

ERROR in src/app/app.module.ts(27,36): error TS2307: Cannot find module './tx-list-all/tx-list-all.component'.

I am running a local grin node and yet getting this error.

Motivation

As we get ready for main net, there's a need to finalise a baseline flow and design for the wallet user interface. These will be dictated by the core use cases that the wallet is expected to handle. We define the user stories to guide a future brief to designers.

User stories

after having installed npm and angular cli, running ng build on 3b9bd71 resulted in the following error:

$ ng build
Could not find module "@angular-devkit/build-angular" from "/Users/user/grin-web-wallet"

build-angular appears to be a newly introduced dependency in Angular 6.0, more info can be found in this StackOverflow question .

running the following command fixed it:

cpm install --save-dev @angular-devkit/build-angular

Hi, If you run
grin wallet web

Then you visit the page

And follow the instructions it gives you

When issuing an api call to the /issue_send_tx endpoint, things fail with the following output:

Failed to load http://localhost:13420/v1/wallet/owner/issue_send_tx: Request header field Content-Type is not allowed by Access-Control-Allow-Headers in preflight response.