Fix Animation Consistency

src/app/components/dropdown/dropdown.scss

@@ -27,6 +27,11 @@ $dropdown_animation_duration: 0.2s;
   cursor: pointer;
 
   max-width: 100%;
+  --dropdown-duration: #{$dropdown_animation_duration};
+
+  &.reduce-motion {
+    --dropdown-duration: 0s;
+  }
 
   &:focus-visible {
     box-shadow: 0 0 0 1px $dropdown_border_color inset, 0 0 0 2px white, 0 0 0 4px $dropdown_accent;
@@ -60,7 +65,7 @@ $dropdown_animation_duration: 0.2s;
   .chevron {
     width: 24px; height: 24px;
     flex-shrink: 0;
-    transition: transform $dropdown_animation_duration $dropdown_animation_timing;
+    transition: transform var(--dropdown-duration) $dropdown_animation_timing;
     user-select: none;
 
     &.open {
@@ -83,7 +88,7 @@ $dropdown_animation_duration: 0.2s;
   max-height: 240px;
   overflow-y: auto;
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
-  animation: slideIn $dropdown_animation_duration $dropdown_animation_timing;
+  animation: slideIn var(--dropdown-duration) $dropdown_animation_timing;
 
   // 자식 요소의 배경색이 테두리를 침범하지 못하도록 하는 사용자님의 핵심 설계 복구
   &::after {

src/app/components/dropdown/dropdown.ts

@@ -14,21 +14,23 @@ export interface DropdownOption {
   templateUrl: './dropdown.html',
   styleUrl: './dropdown.scss',
   host: {
-    'role': 'combobox',
+    role: 'combobox',
     'aria-haspopup': 'listbox',
     '[attr.aria-expanded]': 'isOpen()',
     '[attr.aria-controls]': "isOpen() ? dropdownId + '-listbox' : null",
-    '[attr.aria-activedescendant]': "isOpen() && focusedIndex() >= 0 ? dropdownId + '-option-' + focusedIndex() : null",
+    '[attr.aria-activedescendant]':
+      "isOpen() && focusedIndex() >= 0 ? dropdownId + '-option-' + focusedIndex() : null",
     '[attr.aria-label]': 'ariaLabel()',
     '[class.open]': 'isOpen()',
-    'tabindex': '0',
+    '[class.reduce-motion]': 'reduceMotion()',
+    tabindex: '0',
     '(click)': 'toggle()',
     '(keydown.enter)': 'onEnter($event)',
     '(keydown.space)': 'onSpaceDown($event)',
     '(keydown.escape)': 'close()',
     '(keydown.arrowdown)': 'onArrowDown($event)',
-    '(keydown.arrowup)': 'onArrowUp($event)'
-  }
+    '(keydown.arrowup)': 'onArrowUp($event)',
+  },
 })
 export class Dropdown implements OnInit {
   options = input<Array<DropdownOption | string>>([]);
@@ -45,6 +47,12 @@ export class Dropdown implements OnInit {
   private static nextId = 0;
   dropdownId = `dropdown-${Dropdown.nextId++}`;
 
+  reduceMotion = input<boolean>(
+    typeof window !== 'undefined'
+      ? window.matchMedia('(prefers-reduced-motion: reduce)').matches
+      : false,
+  );
+
   constructor(private el: ElementRef) {}
 
   ngOnInit() {
@@ -58,7 +66,7 @@ export class Dropdown implements OnInit {
   }
 
   normalizedOptions = computed(() => {
-    return this.options().map(opt => {
+    return this.options().map((opt) => {
       if (typeof opt === 'string') {
         return { label: opt, value: opt };
       }
@@ -67,9 +75,9 @@ export class Dropdown implements OnInit {
   });
 
   toggle() {
-    this.isOpen.update(v => !v);
+    this.isOpen.update((v) => !v);
     if (this.isOpen()) {
-      this.focusedIndex.set(this.normalizedOptions().findIndex(o => o.value === this.value()));
+      this.focusedIndex.set(this.normalizedOptions().findIndex((o) => o.value === this.value()));
     }
   }
 
@@ -114,7 +122,7 @@ export class Dropdown implements OnInit {
       this.toggle();
       return;
     }
-    this.focusedIndex.update(i => {
+    this.focusedIndex.update((i) => {
       if (i === -1) return 0;
       return (i + 1) % this.normalizedOptions().length;
     });
@@ -126,7 +134,7 @@ export class Dropdown implements OnInit {
       this.toggle();
       return;
     }
-    this.focusedIndex.update(i => {
+    this.focusedIndex.update((i) => {
       if (i <= 0) return this.normalizedOptions().length - 1;
       return i - 1;
     });
@@ -140,7 +148,7 @@ export class Dropdown implements OnInit {
   }
 
   selectedLabel = computed(() => {
-    const selected = this.normalizedOptions().find(o => o.value === this.value());
+    const selected = this.normalizedOptions().find((o) => o.value === this.value());
     return selected ? selected.label : this.placeholder();
   });
 }

src/app/components/switch/switch.scss

@@ -12,7 +12,7 @@ $switch_border_radius: 15px;
 $switch_border_color: oklch(0 0 0 / 20%);
 
 $switch_animation_timing: cubic-bezier(0.4, 0, 0.2, 1);
-$switch_animation_duration: 0.3s;
+$switch_animation_duration: 0.2s;
 
 :host {
   display: inline-block;

src/app/components/switch/switch.ts

@@ -18,12 +18,13 @@ import { Component, input, model, output } from '@angular/core';
 })
 export class Switch {
   isActive = model<boolean>(false);
+  toggle = output<boolean>();
+
   reduceMotion = input<boolean>(
     typeof window !== 'undefined'
       ? window.matchMedia('(prefers-reduced-motion: reduce)').matches
       : false,
   );
-  toggle = output<boolean>();
 
   onClick(): void {
     this.isActive.update((value) => !value);

src/app/features/settings/popup.html

@@ -11,6 +11,7 @@
       <div class="settings-container">
         <dropdown [options]="languages"
                   placeholder="Choose Language"
+                  [defaultIndex]="0"
                   icon="language"></dropdown>
       </div>
 

src/app/pages/known-issues/known-issues.html

@@ -6,4 +6,10 @@
     <p>Dropdown Component를 테스트하기 위한 UI에서, 상위 컨테이너의 크기가 충분하지 않은 경우 드롭다운이 상위 컨테이너 바깥의 공간을 침범하는 문제가 발생했습니다.</p>
     <div class="status-tag resolved">Resolved</div>
   </section>
+
+  <section class="issue-item">
+    <h2>Issue #2: Dropdown Animation Control</h2>
+    <p>Dropdown Component의 애니메이션 효과가 운영체제의 애니메이션 설정에 영향을 받지 않는 문제가 발생했습니다.</p>
+    <div class="status-tag resolved">Resolved</div>
+  </section>
 </div>