feat: better update page

feat: hide manual update steps as "unsafe" if OTA is available

resolves #155

src/lib/components/AnimatedNumber.svelte

@@ -0,0 +1,51 @@
+<script lang="ts">
+  import { fade, slide } from "svelte/transition";
+
+  let { value }: { value: number } = $props();
+
+  let digits: number[] = $derived(value.toString().split("").map(Number));
+  const nums = Array.from({ length: 10 }, (_, i) => i);
+</script>
+
+<div class="digits" style:width="{digits.length}ch">
+  {#each digits as digit, i (digits.length - i)}
+    <div
+      class="digit-wrapper"
+      style:right="{digits.length - 1 - i}ch"
+      transition:fade
+    >
+      {#each nums as num (num)}
+        <div
+          class="digit"
+          style:transform="translateY({(digit - num) / 4}em)"
+          style:opacity={digit === num ? 1 : 0}
+        >
+          {num}
+        </div>
+      {/each}
+    </div>
+  {/each}
+</div>
+
+<style lang="scss">
+  .digits {
+    position: relative;
+    display: inline-block;
+    transition: width 500ms ease;
+  }
+
+  .digit-wrapper {
+    display: inline-grid;
+    height: 1em;
+    width: 1ch;
+  }
+
+  .digit {
+    display: inline-block;
+    grid-row: 1;
+    grid-column: 1;
+    transition:
+      transform 500ms ease,
+      opacity 500ms ease;
+  }
+</style>

src/lib/meta.ts

@@ -0,0 +1,41 @@
+export interface VersionMeta {
+  version: string;
+  target: string;
+  git_commit: string;
+  git_is_dirty: boolean;
+  git_date: string;
+  public_build: boolean;
+  development_mode: number;
+  update: {
+    ota: string | null;
+    uf2: string | null;
+    esptool: EspToolData | null;
+  };
+  files: string[];
+  spi_flash: SPIFlashInfo | null;
+}
+
+export interface SPIFlashInfo {
+  type: string;
+  size: string;
+  connection: SPIConnection;
+}
+
+export interface SPIConnection {
+  clk: number;
+  q: number;
+  d: number;
+  hd: number;
+  cs: number;
+}
+
+export interface EspToolData {
+  chip: string;
+  baud: string;
+  before: string;
+  after: string;
+  flash_mode: string;
+  flash_freq: string;
+  flash_size: string;
+  files: Record<string, string>;
+}