feat: add SpeedSelector popup component

Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/components/SpeedSelector.svelte

@@ -0,0 +1,89 @@
+<script lang="ts">
+  const SPEED_OPTIONS = [0.5, 0.75, 1, 1.25, 1.5, 2] as const;
+
+  let {
+    currentRate,
+    onSelect,
+    onClose,
+  }: {
+    currentRate: number;
+    onSelect: (rate: number) => void;
+    onClose: () => void;
+  } = $props();
+
+  function handleSelect(rate: number) {
+    onSelect(rate);
+    onClose();
+  }
+
+  function handleWindowClick(e: MouseEvent) {
+    const target = e.target as HTMLElement;
+    if (!target.closest('.speed-selector')) {
+      onClose();
+    }
+  }
+</script>
+
+<svelte:window onclick={handleWindowClick} />
+
+<div class="speed-selector" role="menu">
+  {#each SPEED_OPTIONS as rate (rate)}
+    <button
+      class="speed-option"
+      class:active={Math.abs(currentRate - rate) < 0.01}
+      role="menuitem"
+      onclick={() => handleSelect(rate)}
+    >
+      <span class="check">{Math.abs(currentRate - rate) < 0.01 ? '✓' : ''}</span>
+      {rate}×
+    </button>
+  {/each}
+</div>
+
+<style>
+  .speed-selector {
+    position: absolute;
+    bottom: 100%;
+    right: 0;
+    margin-bottom: 8px;
+    background: rgba(0, 0, 0, 0.85);
+    backdrop-filter: blur(8px);
+    border-radius: 8px;
+    padding: 4px;
+    display: flex;
+    flex-direction: column;
+    min-width: 80px;
+    z-index: 50;
+    border: 1px solid rgba(255, 255, 255, 0.1);
+  }
+
+  .speed-option {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding: 6px 12px;
+    background: transparent;
+    border: none;
+    color: var(--text-primary, #cdd6f4);
+    font-size: 13px;
+    cursor: pointer;
+    border-radius: 4px;
+    white-space: nowrap;
+  }
+
+  .speed-option:hover {
+    background: rgba(255, 255, 255, 0.1);
+    color: var(--accent, #89b4fa);
+  }
+
+  .speed-option.active {
+    color: var(--accent, #89b4fa);
+    font-weight: 600;
+  }
+
+  .check {
+    width: 14px;
+    font-size: 11px;
+    text-align: center;
+  }
+</style>

tests/lib/components/SpeedSelector.test.ts

@@ -0,0 +1,35 @@
+import { describe, it, expect, vi } from 'vitest';
+import { render, fireEvent } from '@testing-library/svelte';
+import SpeedSelector from '$lib/components/SpeedSelector.svelte';
+
+describe('SpeedSelector', () => {
+  it('renders all speed options', () => {
+    const { getByText } = render(SpeedSelector, {
+      props: { currentRate: 1, onSelect: vi.fn(), onClose: vi.fn() },
+    });
+    expect(getByText('0.5×')).toBeTruthy();
+    expect(getByText('0.75×')).toBeTruthy();
+    expect(getByText('1×')).toBeTruthy();
+    expect(getByText('1.25×')).toBeTruthy();
+    expect(getByText('1.5×')).toBeTruthy();
+    expect(getByText('2×')).toBeTruthy();
+  });
+
+  it('highlights the current rate', () => {
+    const { container } = render(SpeedSelector, {
+      props: { currentRate: 1.5, onSelect: vi.fn(), onClose: vi.fn() },
+    });
+    const activeBtn = container.querySelector('.speed-option.active');
+    expect(activeBtn).toBeTruthy();
+    expect(activeBtn!.textContent).toContain('1.5×');
+  });
+
+  it('calls onSelect when an option is clicked', async () => {
+    const onSelect = vi.fn();
+    const { getByText } = render(SpeedSelector, {
+      props: { currentRate: 1, onSelect, onClose: vi.fn() },
+    });
+    await fireEvent.click(getByText('2×'));
+    expect(onSelect).toHaveBeenCalledWith(2);
+  });
+});

vite.config.ts

@@ -3,17 +3,19 @@ import process from 'node:process';
 import { fileURLToPath } from 'node:url';
 import { defineConfig } from 'vitest/config';
 import { svelte } from '@sveltejs/vite-plugin-svelte';
+import { svelteTesting } from '@testing-library/svelte/vite';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const host = process.env.TAURI_DEV_HOST;
 const libAlias = path.resolve(__dirname, 'src/lib');
 
 export default defineConfig({
-  plugins: [svelte()],
+  plugins: [svelte(), svelteTesting()],
   resolve: {
     alias: {
       $lib: libAlias,
     },
+    ...(process.env.VITEST ? { conditions: ['browser'] } : {}),
   },
   clearScreen: false,
   server: {