feat: add refresh button

resolves #82

src/i18n/de/index.ts

@@ -14,6 +14,7 @@ const de = {
   sync: {
     TITLE_READ: "Neueste Änderungen werden abgerufen",
     TITLE_WRITE: "Änderungen werden gespeichert",
+    RELOAD: "Neu laden",
   },
   backup: {
     TITLE: "Verlauf speichern",

src/i18n/en/index.ts

@@ -21,6 +21,7 @@ const en = {
   sync: {
     TITLE_READ: "Reading latest changes",
     TITLE_WRITE: "Saving changes to device",
+    RELOAD: "Reload",
   },
   modal: {
     CLOSE: "Close",

src/lib/serial/connection.ts

@@ -55,6 +55,12 @@ export async function initSerial(manual = false) {
   const device = get(serialPort) ?? new CharaDevice()
   await device.init(manual)
   serialPort.set(device)
+  sync()
+}
+
+export async function sync() {
+  const device = get(serialPort)
+  if (!device) return
   const chordCount = await device.getChordCount()
   syncStatus.set("downloading")
 

src/routes/SyncOverlay.svelte

@@ -1,21 +1,32 @@
 <script lang="ts">
-  import {syncProgress, syncStatus} from "$lib/serial/connection"
+  import {serialPort, syncProgress, syncStatus, sync} from "$lib/serial/connection"
   import LL from "../i18n/i18n-svelte"
-  import {fly} from "svelte/transition"
+  import {slide} from "svelte/transition"
 </script>
 
-{#if $syncStatus !== "done"}
-  <div transition:fly={{y: 40}}>
-    <progress max={$syncProgress?.max ?? 1} value={$syncProgress?.current ?? 1}></progress>
-    {#if $syncStatus === "downloading"}
-      <div>{$LL.sync.TITLE_READ()}</div>
-    {:else}
-      <div>{$LL.sync.TITLE_WRITE()}</div>
-    {/if}
-  </div>
-{/if}
+<div class="container">
+  {#if $syncStatus !== "done"}
+    <div transition:slide>
+      <progress max={$syncProgress?.max ?? 1} value={$syncProgress?.current ?? 1}></progress>
+      {#if $syncStatus === "downloading"}
+        <div>{$LL.sync.TITLE_READ()}</div>
+      {:else}
+        <div>{$LL.sync.TITLE_WRITE()}</div>
+      {/if}
+    </div>
+  {:else if $serialPort}
+    <button transition:slide on:click={sync}><span class="icon">refresh</span>{$LL.sync.RELOAD()}</button>
+  {/if}
+</div>
 
 <style lang="scss">
+  .container {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+  }
+
   div {
     font-size: 12px;
   }