feat: 实现串口信息显示

- 以chat-bubble形式显示串口信息

src/lib/components/RecordPanel/RecordPanel.svelte

@@ -0,0 +1,92 @@
+<script lang="ts">
+  import { tick } from 'svelte';
+  import ChatBubble from './components/ChatBubble.svelte';
+
+  import {
+    records,
+    readingRecord,
+    pinBottom,
+    scrollToRecordIndex,
+  } from '$lib/stores/record/record';
+
+  let rootEl: HTMLDivElement | null = null;
+  let showFullDate = $state(false);
+
+  async function scrollToBottom() {
+    if (!rootEl) return;
+    rootEl.scrollTop = rootEl.scrollHeight + 2000;
+  }
+
+  let lastLength = 0;
+
+  $effect(() => {
+    const len = $records.length;
+    const pinned = $pinBottom;
+
+    if (pinned && len !== lastLength) {
+      lastLength = len;
+      (async () => {
+        await tick();
+
+        scrollToBottom();
+      })();
+    }
+  });
+
+  $effect(() => {
+    const index = $scrollToRecordIndex;
+
+    if (index >= 0 && rootEl) {
+      const els = rootEl.querySelectorAll('.chat');
+      const el = els[index];
+
+      if (el) {
+        el.scrollIntoView({
+          behavior: 'smooth',
+          block: 'center',
+        });
+      }
+
+      scrollToRecordIndex.set(-1);
+    }
+  });
+</script>
+
+<div
+  bind:this={rootEl}
+  class="record-panel relative w-full overflow-y-auto scroll-smooth p-2 pb-10"
+>
+  {#each $records as record (record.timestamp)}
+    <ChatBubble {record} bind:fullDate={showFullDate} />
+  {/each}
+
+  {#if $readingRecord}
+    <ChatBubble
+      bind:record={$readingRecord}
+      reading={true}
+      bind:fullDate={showFullDate}
+    />
+  {/if}
+</div>
+
+<style>
+  ::-webkit-scrollbar {
+    width: 4px;
+    height: 8px;
+  }
+
+  ::-webkit-scrollbar-thumb {
+    background: #ccc;
+    border-radius: 4px;
+  }
+
+  ::-webkit-scrollbar-track {
+    border-radius: 4px;
+    margin: 15px;
+  }
+
+  ::-webkit-scrollbar-button {
+    width: 0;
+    height: 0;
+  }
+</style>

src/lib/components/RecordPanel/components/ChatBubble.svelte

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+<script lang="ts">
+  import {
+    bufferToHexFormat,
+    bufferToDecString,
+    bufferToString,
+  } from '$lib/stores/datacode';
+  import {
+    Tooltip,
+    TooltipContent,
+    TooltipTrigger,
+  } from '$lib/components/ui/tooltip';
+  import { Button } from '$lib/components/ui/button';
+  import Copy from 'phosphor-svelte/lib/Copy';
+  import { formatTimestamp } from '$lib/stores/utils/time';
+  import type { RecordItem } from '$lib/stores/record/record';
+  import { POSITION_MAP } from './ChatBubble.variant';
+  import { copyRecordContent } from '$lib/stores/record/record';
+
+  type Props = {
+    record: RecordItem;
+    reading?: boolean;
+    fullDate?: boolean;
+  };
+
+  let {
+    record = $bindable(),
+    fullDate = $bindable(),
+    reading = false,
+  }: Props = $props();
+
+  type DisplayType = 'hex' | 'ascii';
+
+  const types = ['hex', 'ascii'] satisfies DisplayType[];
+
+  const positionClass = $derived(POSITION_MAP[record.type]);
+
+  let currentDisplay: DisplayType = $state('ascii');
+
+  function toggleDisplay() {
+    const idx = types.indexOf(currentDisplay);
+    const next = types[(idx + 1) % types.length];
+
+    currentDisplay = next;
+  }
+
+  function toggleTimeFormat() {
+    if (fullDate === undefined) return;
+    fullDate = !fullDate;
+  }
+
+  function formatTime(ts?: number) {
+    if (!ts) return '';
+    const full = formatTimestamp(ts);
+    return fullDate ? full : full.slice(11); // HH:mm:ss:SSS
+  }
+</script>
+
+<div class={`group chat ${positionClass}`}>
+  <div class="chat-header mx-2 flex">
+    <button
+      class="cursor-pointer text-sm opacity-70 hover:opacity-100"
+      onclick={toggleTimeFormat}
+    >
+      {formatTime(record.timestamp)}
+    </button>
+
+    <div class="w-4"></div>
+
+    {#if !reading}
+      <button
+        class="cursor-pointer text-sm font-medium opacity-70 hover:opacity-100"
+        onclick={toggleDisplay}
+      >
+        {currentDisplay.toUpperCase()}
+      </button>
+    {/if}
+  </div>
+
+  <div class="chat-bubble max-w-[50%] text-sm wrap-break-word">
+    {#if currentDisplay === 'hex'}
+      {bufferToHexFormat(record.data)}
+    {:else if currentDisplay === 'ascii'}
+      {bufferToString(record.data)}
+    {:else}
+      {bufferToDecString(record.data)}
+    {/if}
+  </div>
+  <div class="chat-footer mt-1 opacity-0 transition group-hover:opacity-100">
+    <Tooltip>
+      <TooltipTrigger>
+        <Button
+          circle
+          size="xs"
+          variant="ghost"
+          onclick={() => copyRecordContent(record)}
+        >
+          <Copy size={16} />
+        </Button>
+      </TooltipTrigger>
+      <TooltipContent>复制</TooltipContent>
+    </Tooltip>
+  </div>
+</div>

src/lib/components/RecordPanel/components/ChatBubble.variant.ts

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+export const POSITION_MAP = {
+  read: 'chat-start',
+  write: 'chat-end',
+  system: 'chat-start',
+};