phase 12

frontend/src/lib/components/canvas/GridSettings.svelte

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+<script lang="ts">
+  /**
+   * Grid settings UI component
+   * Configures grid size, visibility, and snap-to-grid
+   */
+  import { grid } from '$lib/canvas/grid';
+  import { createEventDispatcher } from 'svelte';
+
+  const dispatch = createEventDispatcher();
+
+  function handleSizeChange(event: Event) {
+    const value = parseInt((event.target as HTMLInputElement).value, 10);
+    grid.setSize(value);
+    dispatch('settings-change', { size: value });
+  }
+
+  function handleVisibleToggle() {
+    grid.toggleVisible();
+    dispatch('settings-change', { visible: !$grid.visible });
+  }
+
+  function handleSnapToggle() {
+    grid.toggleSnap();
+    dispatch('settings-change', { snap: !$grid.snapEnabled });
+  }
+</script>
+
+<div class="grid-settings">
+  <div class="settings-header">
+    <h4>Grid Settings</h4>
+  </div>
+
+  <div class="settings-content">
+    <!-- Grid Visibility -->
+    <div class="setting-row">
+      <label for="grid-visible">
+        <input
+          id="grid-visible"
+          type="checkbox"
+          checked={$grid.visible}
+          on:change={handleVisibleToggle}
+        />
+        <span>Show Grid</span>
+      </label>
+    </div>
+
+    <!-- Snap to Grid -->
+    <div class="setting-row">
+      <label for="grid-snap">
+        <input
+          id="grid-snap"
+          type="checkbox"
+          checked={$grid.snapEnabled}
+          on:change={handleSnapToggle}
+        />
+        <span>Snap to Grid</span>
+      </label>
+    </div>
+
+    <!-- Grid Size -->
+    <div class="setting-row">
+      <label for="grid-size">
+        Grid Size
+        <span class="value">{$grid.size}px</span>
+      </label>
+      <input
+        id="grid-size"
+        type="range"
+        min="5"
+        max="200"
+        step="5"
+        value={$grid.size}
+        on:input={handleSizeChange}
+      />
+    </div>
+  </div>
+</div>
+
+<style>
+  .grid-settings {
+    background-color: var(--color-bg, #ffffff);
+    border: 1px solid var(--color-border, #e5e7eb);
+    border-radius: 0.5rem;
+    padding: 1rem;
+    min-width: 250px;
+  }
+
+  .settings-header {
+    margin-bottom: 1rem;
+    padding-bottom: 0.5rem;
+    border-bottom: 1px solid var(--color-border, #e5e7eb);
+  }
+
+  .settings-header h4 {
+    margin: 0;
+    font-size: 0.875rem;
+    font-weight: 600;
+    color: var(--color-text, #111827);
+  }
+
+  .settings-content {
+    display: flex;
+    flex-direction: column;
+    gap: 0.875rem;
+  }
+
+  .setting-row {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+  }
+
+  label {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 0.5rem;
+    font-size: 0.875rem;
+    color: var(--color-text-secondary, #6b7280);
+    cursor: pointer;
+  }
+
+  label span {
+    flex: 1;
+  }
+
+  .value {
+    font-weight: 600;
+    color: var(--color-text, #374151);
+  }
+
+  input[type='checkbox'] {
+    width: 18px;
+    height: 18px;
+    cursor: pointer;
+  }
+
+  input[type='range'] {
+    width: 100%;
+    height: 6px;
+    border-radius: 3px;
+    background: var(--color-bg-secondary, #e5e7eb);
+    outline: none;
+    appearance: none;
+    -webkit-appearance: none;
+  }
+
+  input[type='range']::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 16px;
+    height: 16px;
+    border-radius: 50%;
+    background: var(--color-primary, #3b82f6);
+    cursor: pointer;
+  }
+
+  input[type='range']::-moz-range-thumb {
+    width: 16px;
+    height: 16px;
+    border-radius: 50%;
+    background: var(--color-primary, #3b82f6);
+    cursor: pointer;
+    border: none;
+  }
+</style>