feet: add seed command

lnbits/extensions/watchonly/static/js/index.js

@@ -907,6 +907,18 @@ new Vue({
         })
       }
     },
+    hwwShowSeed: async function () {
+      try {
+        await this.serial.writer.write(COMMAND_SEED + '\n')
+      } catch (error) {
+        this.$q.notify({
+          type: 'warning',
+          message: 'Failed to show seed!',
+          caption: `${error}`,
+          timeout: 10000
+        })
+      }
+    },
     //################### UTXOs ###################
     scanAllAddresses: async function () {
       await this.refreshAddresses()

lnbits/extensions/watchonly/static/js/utils.js

@@ -5,6 +5,7 @@ const COMMAND_SEND_PSBT = '/psbt'
 const COMMAND_SIGN_PSBT = '/sign'
 const COMMAND_HELP = '/help'
 const COMMAND_WIPE = '/wipe'
+const COMMAND_SEED = '/seed'
 
 const blockTimeToDate = blockTime =>
   blockTime ? moment(blockTime * 1000).format('LLL') : ''

lnbits/extensions/watchonly/templates/watchonly/index.html

@@ -1184,6 +1184,20 @@
                               >
                             </q-item-section>
                           </q-item>
+                          <q-item
+                            :disabled="!hww.authenticated"
+                            clickable
+                            v-close-popup
+                            @click="hwwShowSeed()"
+                          >
+                            <q-item-section>
+                              <q-item-label>Show Seed</q-item-label>
+                              <q-item-label caption
+                                >Show seed on the Hardware Wallet
+                                display.</q-item-label
+                              >
+                            </q-item-section>
+                          </q-item>
                           <q-item
                             @click="hwwShowWipeDialog()"
                             clickable